's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 135 



means of the tubercles on the movable finger. Indeed, among the very 
specimens of Ses. bidens, long before examined and determined by de 
Man, I found a large © of Ses. livida. De Man himself has been‘ in 
doubt, whether the two forms A (= Ses. livida) and B (= Ses. bidens 
subsp. indica) should be regarded as two varieties or as distinct species. 
16a. Sesarma (Chiromantes) bidens indica de Man. 
1902. Sesarma (Perisesarma) bidens var. indica de Man. Abhandl. Senc- 
kenb.. Gesellsch., Bd. 25 Heft 3 p. 541 — Amboina and Ternate. 
Specimens in the Museum: 
5 o', 2 9 (2 Co’, 1 QP juv.), Amboina, Ludeking coll. 1863. 
1 o& juv., New Guinea. 
1 © juv., Tjilatjap, south coast of Java, Buitendijk coll. 1905. 
This subspecies, as has been remarked before, is distinguished by a 
somewhat different shape of the external orbital angle and especially by 
the narrower abdomen of the ©. Perhaps this subspecies represents the 
typical Japanese form all throughout the Hast-Indian Archipelago, but 
before more material is available, this cannot be relied upon. 
17. Sesarma (Sesarma s.s.) bidentata Benedict. 
1892. Sesarma bidentata Benedict. John Hopkin’s Univ. Cire., v. 11 p. 
77 — Jamaica. 
1897. Sesarma bidentata Rathbun. Ann. Inst. Jamaica, v. 1 p. 33 — 
Jamaica. 
18. Sesarma (Holometopus) biolleyi Rathbun. 
1906. Sesarma (Holometopus) biolleyi Rathbun. Proc. Biol. Soc. Was- 
hington, v. 19 p. 100 — Costa Rica. 
19. Sesarma (Sesarma s.s.) bocourtt A. Milne-Edwards. 
1869. Sesarma bocourti A. Milne-Edwards. Nouy. Arch. Mus. Paris, t. 5 
Bull. p. 28 — Bangkok (Siam). 
1877. Sesarma cheirogona Targioni-Tozzetti. Zool. viaggio 
141, pl. 9 f. 2 — Yokohama. 
1880. Sesarma bocourti de Man. Notes Leyden Museum, vy. 2 p, 28 — 
Borneo. 
1880. Sesarma bocourti Miers. Ann. Mag. Nat. Hist., (5) v. 5 p. 3138 — 
Borneo. 
1887. Sesarma bocourtt de Man. Zool. Jahrb. Syst., Bd. 2 p. 650 — no 
new locality. 
1894. Sesarma bocourti Zehntner. Rey. suisse Zool., t. 2 p. 182 — Sarawak. 
Oo rs ” 
»Magenta”’ p. 
10 
" (283—V—1917). 
