648 MB. W. r. LANCHESTEB ON THE [DeC. 3, 



than the others ; this, however, appears to be a sexual difference, 

 asWood-Masoii, in giving dimensions of a male and female respec- 

 tively, adds " the greater difference between the length and breadth 

 in the niale specimen is only apparent, being entirely due to the 

 greater mesial excavation of the front." I may add, however, that 

 in this male the front is hardly, if at all, more excavate than in 

 the females. 



Dim. c? 14-75x12. $ 31-5 x 23-5. $30-25x23. 2$$29-5x 

 22-5. 2 28-5x22-25. 



Breadth taken is greatest breadth. 



XXI. Genus Ocypode Fabr. 



80. OOYPODE CEBATOPHTHALMA Pallas. 



Cancer ceratoj>Jit7iahnus, Pal. Spicil. Zool. ix. p. 83, pi. v. fig. 17 

 (1772). 



Ocypoda ceratophthahna, Miers, Ann. Mag. Nat. Hist. (5) x. 

 p. 379, pi. xvii. fig. 1 (1882). 



Loc. Trengganu ; Kelantan. 



Eight males and four females. 



In two males of dimensions 27*5 x 23 the ocular styles are from 

 3-4 mm. in length ; but in a female of 27 x 20-5 they are barely 

 1 mm. 



Dim. c? 44 X 37-25. J 43-5 x 39. c? 43 x 39. J 42-5 x 38. 

 t? 40-5x36-5. d 35x30. 2Jj27-5x23. $40x35. $35x 

 30-5. $27x20-5. $20-5x16. 



37. OcYPOBE coBDiMANA Latr. 



Ocypoda cordimana (Latr.), M.-Edvv. Hist. Kat. Crust, ii. p. 45 

 (1837); de Man, Notes Leyd. Mus. iii. p. 248 (1881); Miers, Ann. 

 Mag. Nat. Hist. (5) x. p. 387, pi. xvii. fig. 9 (1882). 



Loc. Trengganu ; Kelantan. 



Three females. 



Dim. $ 20x16. $ 18x15. $ 15x12. 



38. OcTPODE CONVEXA Quoy et Gaimard. 



Ocypoda convexa, Quoy et Gaim. Voy. ' Uranie,' Zool. p. 525, 

 pi. xvii. fig. 2 (1824); Nobili, Ann. Mus. Civ. Stor. Nat. Genova, (2) 

 XX. p. 518 (1900). 



Loc. Trengganu. 



Tour males and four feinales. 



Dr. Nobili has recently (7. c.) amplified the original description 

 of this species; and in order to assure myself of the identity of tie 

 present form with that species, I sent examples to Dr. Nobili, 

 who very kindly compared them for me with the specimens he had 

 described from Sarawak, and informs me that they are identical. 

 " The only difference," he adds, " is that the greater hand is a little 

 moi-e sv^ollen, and the finger a little shorter, in the specimen {S) 

 from Sarawak, which is somewhat smaller." 



One of the females varies in that both the hands are of the same 



