igii.] S, Kemp: Notes on Decapoda, II. 7 



The rostrum is extremely broad and, in dorsal view (fig. 11), 

 is constricted behind the squarely truncate apex ; its distal breadth 

 is about one- third the total length of the carapace. The lateral 

 margins are greatly elevated and form a sort of hood covering the 

 bases of the eye-stalks. 



The carapace (figs. 11, 12) is sharply carinate in the median line, 

 the carina terminating in a spine a little behind the rostral base. On 

 either side there are three lateral carinae, all of which aie well- 

 defined and are continued as far as the posterior margin. The first 

 of these commences a short distance behind the orbital notch and 

 runs downwards and backwards; it bears no ^pines^ but is abruptly 

 notched near its middle point. The second lateral carina is more 

 or less ])arallel with the first, and is continuous anteriorly with the 

 acute orbital angle ; it bears a sharp spine, a trifle in advance of 

 that in the median line, and further back, near the middle of the 

 carapace, a notch similar to, but well in front of, that on the first 

 lateral carina. The third consists of two distinct carinae, of which 

 the upper is sharp and runs from the apex of the branchiostegal 

 spine to the middle of the carapace, while the lower, which is less 

 prominent, starts beneath the posterior termination of the upper one 

 and reaches to the hinder margin. The branchiostegal spine is very 

 prominent, and extends a little beyond the apex of the rostrum. 



In the female the sternal plates of the last three thoracic 

 somites are ver}^ broad and form the roof of a chamber, continuous 

 with that between the pleopods, which is used for the accommo- 

 dation of eggs. From the anterior margin of the third thoracic 

 sternum a sharp spine extends forwards as far as the base of the 

 outer maxillipedes. 



The e^'es are well pigmented. The lateral process from the 

 basal joint of the antennular peduncle is rounded anteriorly. 

 The antennal scale (fig, 14^ is broad, little more than one and a half 

 times as long as wide, and its convex outer margin terminates in a 

 minute spine, which does not exceed the apex of the lamella. The 

 third maxillipedes extend beyond the distal end of the scale by the 

 ultimate joint and about one-half of the antepenultimate. 



The first pair of peraeopods reaches about as far forwards as 

 the third maxillipedes. The merus is very broad, and does not 

 possess the small spine at the distal end of its upper margin, which 

 occurs in most of the allied species. The second pair is compara- 

 tively stout, and reaches be3'ond the carpus of the first pair ; the 

 ischium is unusually short, and the fingers of the chelae, which 

 are not curved and meet throughout their length when the claw is 

 closed, are twice the length of the palm. 



There are six gills on either side, as in the Atlantic species. 



The abdomen, as will be seen from figs. 11 and 12, is rather 

 elaborately sculptured ; the third, fourth and fifth somites are 

 carinate, the sixth bicarinate. 



The endopod of the last four pairs of pleopods (fig. 13) does 

 not possess an appendix interna; it is, however, remarkable for 

 its length, being only a trifle shorter than the exopod. The telson 



