200 "TERRA NOVA" EXPEDITION. 



Genus JANIRA, Leach. . 



4. Janira longkauda, Chilton. PL I, fig. 6. 



J. longkauda, Chilton, 1884, p. 250, pi. XVIII, figs. 2a-6 ; Thomson and Chilton, 1886, 

 p. 1.57 ; latTirippa longicauda, Bovallius, 1886, p. 31-33; Hutton, 1904, p. 264. 



Occurrence. — Station 96, 7 miles E. of North Cape, New Zealand, 70 fathoms, 

 bottom fauna, one ovigerous female, 4 • 5 mm. 



Remarks. — The uropods and second antennae are broken off in this specimen, but I 

 have little doubt that it should be referred to Chilton's species. It is readily recognised 

 by the well-marked rostrum, by the non-serrated margins of the terminal somite of 

 the pleon, and by the clothing of scattered hairs on the dorsal surface of the body, 

 especially laterally. Chilton does not mention this character in his description. In 

 1886, Bovallius instituted the genus lathrijypa for this species, separating it from 

 Janira on the grounds that the uropods are laminar whereas in Janira they are 

 styliform. I cannot judge of the validity of this distinction, because in my specimen 

 the uropods are missing. But the specimen otherwise seems to be a typical Janira in 

 the restricted sense, and I here refer it to that genus. 



Genus IANTHOPSIS, Beddard. 



5. lanthojosis sp. PL I, figs. 7-10. 



Occurrence. — Station 331, off Cape Bird Peninsula, entrance to McMurdo Sound, 

 250 fathoms, bottom fauna, one male, 5*5 mm. 



Remarks. — In the absence of the uropods and second antennae it is not possible 

 to identify this species with certainty. It is, however, a true lanthoi^sis as defined 

 by Beddard, and is very closely allied to, if not identical with, /. hovallii, Studer, the 

 type species of the genus. Studer, however, only figures a median series of tubercles 

 on the body, but Beddard says there is a double row in specimens which he referred 

 to this species. In my specimen there are three rows of tubercles, rather obscure 

 and difficult to make out, and there is, in addition, an obscure tubercle on the lateral 

 parts of the second to the seventh thoracic somites. Studer, moreover, figures a 

 sharply pointed process on the front margin of the head, between the rostrum and 

 the lateral process. This is not present in my specimen, though the anterior margin 

 of the head is slightly produced at the place where this process is present in Studer's 

 specimen. The latter, too, is almost twice as large as the present one. I give figures 

 of the second thoracic limb and the male operculum of my specimen. The median 

 lamella of the abdominal operculum of the male agrees closely with Beddard's figure 

 of the same appendage in /. bovallii. The thoracic limbs are all bi-unguiculate and 

 slender, and the flagellum of the first antennae is quite short and consists of only 

 five joints. 



Of the five species of this genus recorded by Vanhoffen from the Antarctic, the 



