‘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 of, 2 2 (2 d', 1 © juv.), Amboina, Ludeking coll. 1863. 
1 g' 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 East-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.) bocourti A. Milne-Edwards. 
1869. Sesarma bocourti A. Milne-Edwards. Nouv. Arch. Mus. Paris: t..5 
Bull. p. 28 — Bangkok (Siam). 
1877. Sesarma cheirogona Targioni-Tozzetti. Zool. es Magenta” p. 
141, pl. 9 f. 2 — Yokohama. 
1880. Sesarma bocourti de Man. Notes Leyden Museum, v. 2 # 28 — 
Borneo. 
1880. Sesarma bocourti Miers. Ann. ae, Nat. Hist., (5) v. 5 p. 313 — 
Borneo. 
1887. Sesarma bocourti de Man. Zool. Jahrb. Syst., Bd. 2 p. 650 — no 
new locality. 
1894. Sesarma bocourti Zehntner. Rev. suisse Zool., t. 2 p. 182 — Sarawak. 
10 
 (23—V—1917). 
