340 MR. E. J. MiERS ON [Mar. 21, 



2 are placed on the cardiac region, of which the posterior is very 

 large, 3 (very large) on the intestinal region, 2 on each hepatic 

 region, and about 7 on each branchial region, besides the marginal 

 spines, of which there are 5 ; 3 are placed on each pterygostomian 

 region, the anterior of which is situated at the antero-lateral angle of 

 the buccal cavity ; there is also a distinct but not very large prse- 

 ocular spine. The orbits are rather small, with a lateral aspect, and 

 with two fissures above and a large hiatus below. The spines of the 

 rostrum are subcylindrical and very long (in the male as long as the 

 carapace), straight, and very slightly divergent distally ; they bear 

 an accessory spine on their upper surface at some distance from the 

 distal end, which is acute. The basal antennal joint is longer than 

 broad, and bears a strong spine, directed obliquely downward, at its 

 antero-external angle ; the nest joint is slender and very much elon- 

 gated, the third also slender ; these joints and the flagelhim are 

 scarcely visible in a dorsal view. The epistoma is large, but broader 

 than long ; the ischium joint of the outer maxillipedes is longer than 

 broad; the nierus joint truncated at its distal end, and with only a 

 very small notch at its antero-internal angle above the place of articu- 

 lation with the next joint. The chelipedes in both sexes are slender ; 

 in the male, however, somewhat more robust than in the female : the 

 merus joint is cylindrical, elongated, with a strong spine above at its 

 distal end. Carpus short, armed on its upper and outer surface with 

 two or three small spines or tubercles ; palm smooth, subcylindrical 

 (in the male about 3j| times as long as broad) ; fingers slender, more 

 than half as long as the palm, somewhat incurved, having between 

 them when closed (in the male) a small hiatus at base; both fingers 

 in their distal halves nre denticulated and meet along their inner 

 edges ; the mobile finger has in the male a tubercle on its inner margin 

 near the base. The ambulatory legs are slender and much elon- 

 gated, the first pair very much longer than the following ; there is a 

 spine at the distal end of the upper surface of the merus joints in all 

 the ambulatory legs. The dactyli, although shorter than the pre- 

 ceding joints, are yet elongated and shghtly curved, and terminate 

 in a small corneous claw. The segments of the postabdomen are all 

 of them distinct in both sexes ; in the male all, except the last, have 

 a small median spine, on each side of which, on the second and 

 third segments, is a lateral spine ; in the female the first four are 

 armed with a small median spine or tubercle. The animal is covered 

 with a short dense yellowish-brown pubescence, which, however, is 

 absent from the palms and fingers of the chelipedes, and partially so 

 from the penultimate and terminal joints of the ambulatory legs, the 

 ground-colour of the integument being, in these places, in the two 

 dried specimens 1 have examined, purplish-red. Length of the 

 carapace to the base of rostral spines in an adult male about 2| 

 inches (6S mm.), which is also the length of the spines themselves; 

 of a chelipede about 4| inches (113 mm.), of the first ambulatory 

 legs nearly 9^ inches (242 mm.). 



Two specimens, a male and a female, were collected. In the 

 female the carapace is somewhat more pyriform and convex, the 



