CBtrsTACEA. 651 



A single female, in •wMcli the chelipedes are deficient, was obtained 

 at Providence Island, 19 fms. (No. 217). 



A specimen also of this variety is in the British-Museum collec- 

 tion from the Indian Ocean, and others from the collection of 

 H.M.S. ' Samarang ' without special locality. Of the typical C gallus, 

 there are specimens in the collection from the Mauritius ; Ceylon 

 {E. W. H. Holdsworih), and others without special locality ; also 

 specimens from the West Indies ; and Grardeu Key, Tortugas 

 {SmiiJisonian Institution, designated G. galloides). Specimens from 

 the Philippines ( Cuming) and Eastern Seas {H.M.S. ' Samarang '), 

 which possibly belong to this species, have the tubercles of the 

 carapace larger, smoother, and more rounded than in the typical 

 C. gallus. 



A. Milne-Edwards has recently described a species, G. angusta*, 

 from the West Indies, which is too briefly characterized to be iden- 

 fied with certainty, but with which G. gallus var. bicornis may 

 possibly be identical. The lateral margins of the carapace are, 

 however, described as finely granulated, whereas in var. bicornis 

 they are distinctly dentated, as usual in the genus Calappa. 



74. Cymopolia wMtei. (Plate XLIX. fig. C.) 



The carapace is shaped nearly as in C. jukesii. White, which this 

 species much resembles j it is subquadrate, transverse, with the 

 posterior margin slightly rounded ; the cervical and other suld of 

 the carapace are distinct and smooth, the dorsal surface between 

 them is everywhere granulated, but is without spines. The front 

 is moderately prominent, and is divided by a median fissure into 

 two median lobes ; outside of which the frontal margin is sinuated, 

 but not distinctly lobate ; the upper orbital margin is divided by two 

 deep fissures, the median lobe truncated, the outer orbital angle promi- 

 nent and acute ; behind it on the lateral margin of the carapace are two 

 smaller teeth. The fourth to sixth segments of the postabdomen are 

 partially coalescent ; its sides are subparallel to about the middle of the 

 penultimate segment, whence they converge rapidly to the distal end 

 of the terminal segment, which lies just between the bases of the 

 outer maxillipedes, as in G. dentaia, A. M.-Edwards. The cristi- 

 f orm lobe on the anterior margin of . the eye-peduncles has its 

 anterior margin regularly arcuated. The inner suborbital lobe is 

 subacute and but little prominent ; there is a prominent subquadrate 

 lobe on the outer side of the peduncles of the antennse, whose 

 flagella are about 14-jointed. The merus-joint of the outer max- 

 illipedes has an incurved tooth or lobe at its extero-distal angle 

 as in G. jukesii. The chelipedes (in the small males I have ex- 

 amined) are rather small, slender, and of nearly equal size ; morus 

 and carpus unarmed ; palm about twice as long as the wrist, 

 and smooth or very obscurely granulated ; fingers about half as 

 long as palm, acute, and somewhat deflexed, with their inner edges 



* Bull. MuB. Comp. Zool. Tii. p. 18 (1880). 



