36 



The 9 from Stat. 40 is very small (distance between ext. orbital angles 15.5 mm.); 

 nevertheless, it is bearing eggs. 



According to Stimpson j ) O. laevis Dana should be distinguished from this species by 

 the more prominent orbital angles and by the smoothness of the edges of the hand. 



O. cordimana seems to be more terrestrial in its habits than any other species of the 

 genus; according to Henderson 2 ) it lives on sandy bottom, far from the shore. De Man 3 ) 

 records a specimen from fresh water. 



2. Ocypoda ceratopJühalma Pallas. 



Literature: Ortmann, 1. c. p. 364 and Alcock, Journ. As. Soc. Bengal, v. 69, prt 2, 1900, p. 345. 



Stat. 40. Pulu Kawassang, Paternoster Islands. 1 <ƒ. 



Stat. 50. Labuan Badjo, west coast of Flores. 1 <ƒ , 1 9- 



Stat. 61. Lamakera, Solor Island, reef. 2 cT, 1 9- 



Stat. 71. Makassar. 6 c? ( aet - div.). 



Stat. 89. Pulu Kaniungan, east of Borneo. 3 (f (juv.). 



Stat. 93. Sanguisiapo, Sulu Archip. 1 <ƒ. 



Stat. 131. Karakelang, Talaut Islands. 2 (f, 1 5. 



Stat. 133. Lirung, Talaut Islands. 2 (juv.). 



Stat. 179. Kawa Bay, west coast of Ceram. 2 (juv.). 



Stat. 263. Great Kei Island. 3 (ƒ. 



There is a considerable variation in the number of ridges, composing the stridulating 

 organ. From the dorsal part of the hand downwards there are firstly some tubercles, foliowed 

 by a series of thicker ridges, that are again succeeded by a series of narrower ridges, with 

 much narrower interspaces between them. De Man 4 ) describes a specimen, in which these latter 

 ridges are not so closely crowded as usually; besides, the number of these two kinds of ridges 

 is not at all constant. I also found a specimen, in which the narrow ridges were rather widely 

 separated from each other, and the thicker ridges were obsolete and scarcely indicated. 



As is well known, the horny prolongation of the eye-stalks is likewise subject to much 

 variation, even between individuals of the same size and sex. And thirdly, the epibranchial 

 angles may reach sideways beyond the external orbital angles or not. 



3. Ocypoda kithli de Haan. 



Synonymy and literature: Ortmann, Zool. Jahrb., Syst., Bd 10, 1897, p. 364. 



Stat. 51. Bay of Madura. 1 cT- 



Stat. 61. Lamakera, Solor Island, reef. 1 cf. 



This widely-distributed, but apparently not very common species, is distinguished by 

 the stridulating organ being eomposed of transverse tubercles or short ridges, usually few in 



1) Smithson. Inst., Miscell. Coll., v. 49, 1907, p. III. 



2) Transact. Linn. Soc. London, (2) v. 5, 1893, p. 328. 



3) Abhandl. Senckenb. Gesellsch., Bd 25, Heft 3, 1902, p. 483. 



4) Abhandl. Senckenb. Gesellsch., Bd 25, Heft 3, 1902, p. 478, pi. 19, f. 



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