10 Mr. E. J. Miers on the 



length of a chelipede 8| lines (18 milliin.), of first ambulatory 

 leg nearly 10 lines (21 millim.). 



Hob. Port Denison, 5 fathoms (Has well), Torres Straits 

 (Prince-of- Wales Channel and Thursday Island, 3-9 fathoms) 

 (H.M.8. 'Alert'). 



I have examined a small specimen of this species in a col- 

 lection from Singapore, made by Surgeon -Major S. Archer. 



Micippa thalia. 



Cancer thalia, Herbst, Naturg. Krabben u. Krebse, iii. (3) p. 50, 

 pi. lviii. fig. 3 (1803). 



(1872); Miers, Crustacea in Zuolog. Coll. Il.M.S. 'Alert,' p. 198 



(1884). 

 Micippa inenuis, Haswell, Proe. Linn. Soc. N. S. Wales, iv. p. 445, 



pi. xxvi. fig. 3 (1880) ; Cat. Australian Crustacea, p. 24 (1882). 

 Micippa pusilla, Bianconi, Mem. Accad. Bologna (serie seconda), ix. 



p. 205, pi. i. fig. 1 (1809). 

 Micippa thalia, var. caledonica, Kossmann, Malacostraca in Zool. Ergebn. 



einer Reise in die Kustengeb. dns R. Meeres, p. 8, pi. iii. tig. 4 (1877). 

 Micippa thalia, var. indica, Kossmann, /. c. p. 8 (1877). 



The carapace is moderately convex or depressed, suboblong 

 or broader at the branchial regions ; its dorsal surface is tomen- 

 tose and closely granulated, and usually armed with spines 

 upon the dorsal surface, which, when present, are disposed as 

 follows : — A strong supraocular orbital spine, two median 

 spines on the gastric region of the carapace placed one behind 

 the other, and one on each branchial region, and sometimes 

 two on the posterior margin ; the upper margin of the orbit 

 also has three spines behind the supraocular spine, and the 

 lateral margins of the carapace are armed with from six to nine 

 spines or spinules. The rostrum is nearly vertically deflexed, 

 deeply emarginate, and terminates in two strong acute lobes or 

 spines, the apices of which usually curve somewhat outwardly. 

 The basal antennal joint is granulated and considerably dilated, 

 but less so than in some species of the genus, and bears a 

 spine at its antero- external angle (the infraocular orbital 

 spine) ; behind this the orbit is incomplete. The chelipedes 

 (in the adult male) are rather small ; merus sometimes granu- 

 lated, carpus and palm nearly smooth, the merus not carinated 

 above ; the palm slender and not enlarged ; the fingers nearly 

 straight, and without any or with but a very small intermar- 

 ginal hiatus. The ambulatory legs are very tomentose, the 

 merus and carpus joints are sometimes thickened, and the 

 merus may have a small distal spinule, but the joints are 

 otherwise nearly smooth, not spinuliferous. 



