On the myriapods collected during the 'Skeat expedition' to the Malay peninsula, 1899-1900 / by F.G. Sinclair (formerly F.G. Heathcote).

  • Sinclair, F. G. (Frederick Granville), 1858-
Date:
1901
Catalogue details

Licence: In copyright

Credit: On the myriapods collected during the 'Skeat expedition' to the Malay peninsula, 1899-1900 / by F.G. Sinclair (formerly F.G. Heathcote). Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    8/38 (page 510)
    latter formiug one curve with sides of tergite. Anterior border nearly straight, sides of tergite rounded ; anterior edge raised into a ridge along which a row of tubercles is arranged, the ridge is carried round the side of the tergites ; posterior margin with eight tubercles arranged in a row; at the lateral margin thi're are more tubercles, but flattened and irregular. The surface of the tergite is covered with smaller tubercles arranged irregularly, and there is an irregular transverse row of some larger tubercles. 2nd tergite is narrow and curved forward and downward, the edge of the keel being rounded. 3rc? tergite does not project so much downward and forward ; the anterior and lateral margins meet so as to form a fairly acute point, the posterior margin rounding-off into the lateral. Aili tergite. Anterior margin nearly straight; forms a subacute angle with the lateral, the posterior forming an obtuse angle with the latter. On this tergite one can see the first beginning of the basal shoulder. bih to lOtli tergites: the angle formed by the anterior and lateral margins becomes gradually more of a right angle. 11^7i tergite. From the 11th tergite the posterior angle begins to project, and at the 15th it has the form of a spine. V2lli tergite. From the 12th the lateral edge of the keel shows signs of being lobed. 16i^7i tergite. At this somite the lateral edge of the keel shows five lobes, which are distinct on the 17th. The last three tergites show three rows of tubercles ; on the 15th the third row becomes con- fused with the smaller tubercles which cover the surface, but the two posterior rows may be traced more or less easily up to the first. The stigmata repugnatoria are placed nearly in the middle of the keel at a distance of about 2 diameters from the edge. The anal plate is rounded posteriorly, and shows six raised longi- tudinal ridges differing in length and arranged symmetrically. The sub-anal plate is triangular, and is armed near the apex with two long papillsD, each of which bears a long seta. The edges of the anal valves are not very strongly marked, and have two pairs of setiferous tubercles near the margins. Outside of the valve are two more setiferous tubercles, arranged symmetrically with the internal ones. Sterna are coriaceous, and without spines or furrows. At the base of each leg there is one tubercle on the internal side and two on the external side. In the anterior region of the body these tubercles (the external ones) show an irregularity of arrangement; the two posterior ones are arranged in a straight line from the base of the leg to the under surface of the keel; the anterior two are arranged parallel to a line connecting the bases of the legs. The legs and antennae are hairy. Another specimen is 82^ mm. long and 12| mm. broad. [6]