760 MB. W. F. LANCHESTER ON CRUSTACEANS [Julie 19, 



the latter with ova : two of the males, however, only represented 

 by exuvia. 



The tubercle on the inner margin of the thumb is, in these, 

 rather more flattened than in the type (v. de Man, t. c), leaving a 

 larger interspace between itself and the finger. 



Dim. S 17x9-5. S 17x9-25. S 15-25x9. 6 12-5x7-5. 

 $ 14-5x8-5. $ 15x8-5. $ 12x6-5. 



90. Macrophthalmus podophthalmus Eydoux & Souleyet. 



MacropJithalmus podophthalmus, Eyd. & Souleyet, Voy. 'Bonite, 

 Zool. Crust, vol. i. pi. iii. f. 6 (1841) ; M.-Edw. Ann. Sci. Nat. 

 ser. 3, Zool. t xviii. p. 155 (1852); Hasw. Cat. Austr. Crust, p. 88 

 (1882) ; Miers, ' Challenger' Brachyura, p. 249 (1886). 



Hab. Singapore ; littoral. A male. 



In this specimen the eye-peduucles do not project by much more 

 than a quarter of their length. 



Dim. 14 x 8*5. Length of eyes 8*25. Length of projecting 

 portion of eyes 2*5. 



91. Macrophthalmus japonicus de Haan. 



Ocypode {Macrophthalmus) japonica, de Haan, Crust. Japon. 

 p. 54, pi. vii. f. 1, & pi. xv. f. 2 (1839). 



Macrophthalmus japonicus, Ad. & AVIiite, ' Samarang ' Crust. 

 p. 51 (1848); M.-Edw. Ann. Sci. Nat. ser. 3, Zool. t. xviii. p. 158 

 (1852). 



Hab. Singapore ; littoral. A female with ova. 



Dim. 10-5x8. 



LII. Genus Scopimera de Haan. 



92. Scopimera myctiroides M.-Edw. (Plate XLVII. fig. 14.) 



Doto myctiroides, M.-Edw. Ann. Sci. Nat. ser. 3, Zool. t. xviii. 

 p. 152, pi. iv. f. 24 (1852). 



Dotilla myctiroides, Walker, Journ. Linn. Soc, Zool. vol. xx. 

 p. Ill (1887). 



Scopimera myctiroides, Henderson, Trans. Linn. Soc, Zool. vol. v. 

 p. 390 (1893). 



Hab. Singapore In great numbers on the sand between tide- 

 marks, burrowing in holes. 



Out of 81 specimens, I find 7 females, one bearing ova. I think 

 .it has hitherto escaped notice that the shape of the female abdomen 

 is almost exactly similar to that of the male. Prof. Henderson 

 (torn, cit.) states that out of a very large series he had ouly met 

 with males. But on examining a bottle in the Museum collection, 

 . labelled " Sc. myctiroides, Bameswaram, J. B. Henderson, 92.7.15," 

 I find, out of about 30 examples, at least as many females as males. 

 The female abdomen, however, may still be distinguished externally 

 from that of the male by a generally broader aspect. Taking 

 measurements from the base of the 5th segment to the tip of the 



