248 "TERRA NOVA" EXPEDITION. 



spinules covering the anterior part of the body generally ; (4) the more scanty clothing 

 of setae on the body. The two speciniQns I have referred to this species bear out 

 Vanhoffen's description. They were very easily picked out from the dozen or so 

 G. antarctica which accompanied them. 



54. Gnathia calva, Vanhoffen. PI. XI, figs. 1-3. 

 G. calva, Vanhoffen, 1914, p. 449, text-fig. 26. 



Occurrence. — Station 314, 5 miles N. of Inaccessible Island, McMurdo Sound, 

 222-241 fathoms, Jan. 23, 1911, one female. 



Station 331, off Cape Bird Peninsula, entrance to McMurdo Sound, 250 fathoms, 

 Jan. 14, 1912, five males. 



Remarks. — Five males of this species were detected among the Gnathia antarctica 

 and G. luxlgsoni collected at Station 331. They measured from 5"5mm.-6'5 mm., 

 and are thus slightly larger than Vanhoffen's types. I have given a new figure (pi. XI, 

 fig. 1) of one of these specimens for comparison with Vanhoffen's figure, since the 

 spinulation of the body seems scarcely so pronounced and rather finer than Vanhoffen 

 shows it to be. Otherwise the specimens are in complete agreement with Vanhoffen's 

 description. The species may be distinguished from the other Antarctic species of 

 Gnathia by the absence of hairs on the body generally, by the absence of pre-ocular 

 processes, by the shape of the anterior margin of the head, by the relatively longer 

 peduncles of the antennae and antennules, and by the form of the mandibles (pi. XI, 

 fig. 2). 



From Station 314 1 obtained a single female Gnathia, which I regard as the female 

 of this species. It measures 5 mm. in length and is devoid of hairs on the body. It 

 may be distinguished at once from the females of G. antarctica by the form of the 

 frontal process, which is very much longer and more prominent, with parallel sides and 

 emarginate apex. A comparison of the figure here given (pi. XI, fig. 3) of the 

 front part of the present female specimen with Vanhoffen's figure (1914), p. 487, text- 

 fig. 246, will bring out this distinction. 



It is a matter of interest that all the three species of Gnathia in this collection 

 were collected together at the same station. 



PRANIZA LARVAE. 



Praniza larvae were collected at the following Stations, but have not been identified 

 with any known species. 



Station 317, hole in ice between Cape Evans and Inaccessible Island, 74 fathoms, 

 June 7, 1911, from Trematomus sp., one. 



Station 338, 77° 13' S., 164° 18' E., 207 fathoms, Jan. 23, 1912, one. 



Station 339, 77° 5' S., 164° 17' K, 140 fathoms, Jan. 24, 1912, one. 



