Species of Maioid Crustacea. 27 



traction of the carapace behind the orbits. Moreover the 

 carinre on the merus and ischium joints of the ambulatory 

 legs are not armed with spines as in C. contracta. 



Cryptopodia spatulifrons, var. loevimana. 



There are in the British Museum two smaller specimens 

 (males) which probably belong to the same species as the one 

 described above. The carapace is tuberculated only upon the 

 elevated parts of the branchial and cardiac regions, and on the 

 posterior and postero-lateral expansions; elsewhere it is smooth, 

 scarcely even punctured. The upper surface of the arm and 

 hand is smooth ; the lower is also smooth, except for a longi- 

 tudinal median ridge of granules. Of this variety one speci- 

 men was obtained on the coast of Borneo, the other is without 

 indication of locality. As the specimens are of smaller size, 

 they probably represent the younger condition of the species. 



Ceratocarcinus spinosus, sp. n. (PI. V. fig. 11.) 



By this name I propose to designate a specimen of very 

 snail size, which may be immature, yet differs more remark- 

 ably from the type species of the genus (C. longimanus^ Ad. 

 & White) than do the other described species, C. speciosus 7 

 Dana, and C. di/atatus, A. M. -Edwards. The spines of the 

 rostrum, lateral margins, and gastric region are far longer than 

 in either of the species above mentioned ; and there is in addi- 

 tion a smaller spine upon each of the branchial regions, two 

 spines upon the wrist, and one at the distal end of the upper 

 margin of the hand and of the merus joint of each of the am- 

 bulatory legs. Length only 1-| line. 



Hob. Eastern seas [H.M.8. 'Herald'). 



The specimen appears to be a female ; as in the other species 

 of the genus, the antennas are completely excluded from the 

 inner orbital hiatus. 



EXPLANATION OF THE PLATES. 



Plate IV. 



Fig. 1. Achaopsis Giintheri, female individual : nat. size. 1 a. Lateral 

 view of carapace of the same, showing- the very prominent 

 dorsal spine : nat. size. 



Fig. 2. Trigonofhir obtusirostris, male individual : X H diam. 2 a. Ros- 

 trum of the same, viewed from the side : further enlarged. 



Fig. 3. Huenia paeifica, male individual : X 1 1 diam. 3 a. Lateral view 

 of rostrum of the same : X 2 diam. 



