19 



east coast of America is Lept. carinata Ortm., which is distributed from off the mouth of the 

 Tocantins, Brazil, to the Bahamas. 



The species of this genus are found in rather shallow water, the greatest depth recorded 

 bemg 150 fathoms, at which a female with eggs of Lept. robusta Stimps. was dredged by the 

 Siboga expedition, the same species was, however, also obtained on the reef and at inter- 

 mediate depths. 



I. Leptochcla robusta Stimps. PL III and IV, Fig. 7 — 7.1-. 



Leptochela robusta W. Stimpson, in: Proc. Acad. Nat. Sciences Philadelphia, i86o, p. 43. 

 Leptochcla robusta J. G. de Man, in: Abhandl. Senckenb. Naturf. Gesells. Bd. XXV, 1902, p. 902. 

 Leptochela robusta M. J. Rathbun, in: U.S. Fish Commission Bull, for 1903, Part III, Wash. 



1906, p. 929. 

 Leptochela robusta H. Balss, Die Decapoden des Roten Meeres. I. Macruren. VVien 191 5, p. 17. 

 Leptochela robusta J. G. de Man, in : Zoologische Mededeelingen, uitgegeven vanwege 's Rijks 



Museum van Natuurlijke Historic te Leiden, Dl. II, Afl. 3 en 4, 1916, p. 148. 



Stat. ij. March 3031. Sailus Ketjil, Paternoster-island.s. Plankton, surface. [3 very young 



specimens. 

 Stat. 41. April 3. 7°25'S., ii7°5o'.5E. Plankton, surface to a depth of 10 m. 7 young 



specimens. 

 Stat. 47. April 8/12. Bay of Bima, near south fort. 55 m. Bottom mud with patches of fine 



coral sand, i young male. 

 Stat. 105. July 4. 6°8'N., 121° 19' E. 275 m. Coralbottom. i female with eggs. 

 Stat. 109. July 56. Anchorage off Pulu Tongkil, Sulu-archipelago. 13 m. Lithothamnion- 



bottom. I young specimen. 

 Stat. 114. Julys. o°58'.5N., i22°55'E. Kwandang-bay-entrance. 75 m. Bottom hard sand, very 



fine. I young female with eggs. 

 Stat. 133. July 25,27. Anchorage off Lirung, Salibabu-island. Up to 36 m. Bottom mud and 



hard sand, i young male. 

 Stat. 141. August 5. i°o'.4S., I27°25'.3E. Bottom very fine, hard sand, i male. 

 Stat. 142. August 5 7. Anchorage off Laiwui, coast of Obi major. Plankton. At night, i very 



young specimen. 

 Stat. 153. August 14. o°3'.8N., 130° 24.3 E. North of Waigeu-island. 141 m. Bottom fine 



and coarse sand with dead shells. 61 specimens, 22 males and 39 females, that 



are all ova-bearing. 

 Stat. 166. August 22. 2°28'.sS., i3i°3.3E. 118 m. Bottom hard, coarse sand, i young male. 

 Stat. 181. Sept. 511. Ambon. 54 m. Bottom mud, sand and coral. I young male. 

 Stat. 204. Sept. 20. 4°2o'S., I22°58'E. Between islands of Wowoni and Buton, northern 



entrance of Buton-strait. From 75 — 94 m. Bottom sand with dead shells, i young 



specimen. 

 Stat. 285. January 18, 1900. 8°39'.iS., I27°4'.4E. Anchorage south coast of Timor. 34 m. 



Bottom on the limit between mud and coral. Lithothamnion. i young male. 

 Stat. 296. January 2426, 1900. io°i4'S., I24°5'.5K. Anchorage off Noimini, south coast of 



Timor. Reef, i young male. 

 Stat. 313. Febr. 14 16, 1900. Anchorage East of Uangar Besar, Saleh Bay. Up to 36 m. 



Bottom sand, coral and mud. 4 young males. 



Like in Lept. carinata Ortm. (M. J. Rathbun, U.S. Fish Commission Bulletin for igoo, 

 \'ol. 2, Wash. 1901, p. 127), the carapace of the female is tricarinate dorsally, while that of 

 the male is rounded. The ova-bearing females from Stat. 153 are all nearly of the same size, 



