REPORT ON THE CRUSTACEA MACRURA. 821 



Nematocarcinus hiatus, n. sp. (PL CXXXII. fig. 12). 



There is only a fragment of this species. The carina on the gastric region of the 

 carapace is feeble ; the frontal crest is adorned with six spinules, and after a short hiatus 

 there are twenty-three or twenty-four teeth continuous as far as the broken extremity of 

 the rostrum ; on the lower margin there are six teeth, of which the anterior corresponds 

 with the fracture. 



The ophthalmopoda are short. 



The first pair of antennas has the peduncle reaching to about half the length of the 

 rostrum. 



The second pair of antennas has a scaphocerite reaching as far as the fractured 

 extremity of the rostrum, and it therefore falls short of the apex in a perfect 

 specimen. 



The first pair of gnathopoda is preserved, but there is nothing to enable us to 

 determine the character of the fragment beyond the form of the rostrum. In the number 

 of the teeth on the rostrum this species approximates to Nematocarcinus longirostris, 

 but the free length of the unarmed portion in Nematocarcinus longirostris, and the 

 appearance and position of the teeth on the lower margin, at once show that the two are 

 distinct. 



Length of carapace, ..... 18 mm. (0'7 in.). 



,, of rostrum (broken), . . . . 12 ,, 



Habitat— Station 169, July 10, 1874; lat. 37° 34' S., long. 179° 22' E.; off New 

 Zealand ; depth, 700 fathoms ; bottom, blue mud ; bottom temperature, 40°. A fragment 

 only. Trawled. 



Nematocarcinus intermedins, n. sp. (PI. CXXXII. fig. 13). 



Rostrum two-thirds the length of the carapace, armed on the upper surface with very 

 small spinules, twelve or thirteen of which are closely planted together on the dorsal 

 crest, and eleven or twelve more widely separated from each other and continuous to the 

 apex. 



Ophthalmopoda tolerably large. 



First pair of antennas having the peduncle about half the length of the rostrum. 



Second pair of antennas having the scaphocerite reaching to a level with the apex of 

 the rostrum. 



Second pair of gnathopoda not reaching as far as the extremity of the scaphocerite. 



Posterior three pairs of pereiopoda having the carpos as long as the ischium and 

 meros combined ; that of the preceding pairs is shorter. 



