194 _  ZOOLOGISCHE MEDEDEELINGEN — DEEL LEDE 
1899. Sesarma (Episesarma) rotundata var. papuo-malesiaca Nobili. Ann. 
mus. clv. stor. nat. Genova, (2) t. 20 p. 268 — New Guinea. 
1899. Sesarma (Sesarma) rotundata var. papuo-malesiaca Nobili. Ann. mus. 
civ. stor. nat. Genova, (2) t. 20 p. 510 — Nias. 
1900. Sesarma gardineri Borradaile. Proc. Zool. Soc. London, 1900, p. 
993, pl. 42 f. 8 — Funafuti and Rotuma. 
1900. Sesarma oceanicum Alcock. Journ. As. Soc. Bengal, v. 69 prt 2 
p. 423 — Nicobars. 
1905. Sesarma (Sesarma) gardineri Nobili. Ann. Mus. Hung., t. 3 p. el 
— Berlinhafen (German New Guinea). . 
1906. Sarmatium faxoni Rathbun. Bull. U. 5. Fish Comm. for 1903, 
v. 23 prt 3, p. 841 pl. 7 f. 1 — Oahu and Marshall Islands. 
1907. Sesarma (Sesarma) rotundatum Rathbun. Mem. Mus. comp. Zool. 
Harvard Coll., v. 35 n°. 2 p. 33 — Marshall Islands. 
Specimens in the Museum: 
1 G' (juv.), Tjibodas (Java), Dr. Boerlage coll. 1888 
(Ses. oceanica, examined by de Man 1891). 
1  (juv.), Nias, B. E. W. Schröder coll. 1908. 
Milne-Edwards founded his Ses. dentifrons on a Q, Hess his Ses. 
rotundata on a Œœ. De Man (1896) examined the typical specimens of 
both these species and came to the conclusion, that they probably be- 
longed to one and the same species; the following difference, however, 
were observed: 
1°. The carapace is in Ses. rotundata slightly more narrowed anteriorly 
than in Ses. dentifrons, as the distance between the external orbital 
angles, compared with the length of the carapace, is somewhat greater 
in the latter form. 
2°. The posterior margin of the carapace is somewhat broader in Ses. 
dentifrons. 
8°. The height of the front is 3 times the breadth in Ses. rotundata, 
somewhat less in Ses. dentifrons. 
4°. The tubercles at upper surface of wrist of chelipeds are better pro- 
nounced in Ses. dentifrons, especially at anterior and outer border. 
5°. The tubercles at outer sanne of palm are more acute, cone-shaped 
in Ses. dentifrons. 
6°. The hairy covering at the posterior margin of propodites and of dac- 
tyli of the ambulatory legs is much better developed in Ses. rotundata ; 
in Ses. dentifrons these hairs are reduced to isolated brushes of short 
hairs. 
