CRl'STACKA MALACOSTRACA. III. , 



Paramunnopsis oceanica Tattersall. 

 (PI. XIII, fig*, n a ii i; PI. XIV, figs, i a-i b). 



! 1905. Afunnofisis otranica Tattersall, Isopoda, p. 23 and 72; PI. V, figs. 1-7. 

 '9 11 - Tattersall, Die nordischen Isopoden, in Nordisches Plankton, VI, p. 187, with 



figures. 



'9'4- Vanhoffen, Deutsche Sudpolar-Exp. 19011903. Vol. XV, Zool. VII, p. 581, 



figs. 1 1 a b (? and 1 1 c d). 



Description. Body of a female with marsnpinni abont three times, of the males (fig. i a) 

 three and half times as long as broad, without processes or teeth on the dorsal surface or on the lateral 

 margins of thorax and abdomen. -- Antennal peduncles nearly twice as long as the body. Molar 

 process on left mandible (figs, uc and ue) slender, tapering from the base to the acute end, with 

 five or six oblong acute teeth on the distal half of the posterior margin. Maxillipeds (fig. n f) with 

 fourth and fifth joints conspicuously broader than second joint, which tapers towards the base; sixth 

 joint produced in a lobe, which is much longer than broad and much longer than the joint; distal 

 part of the epipod somewhat produced, but the narrow end obtuse. 



Fifth joint of the natatory legs (Tattersall: Isopoda, fig. 6) twice or a little less than twice as 

 long as broad. -- Abdomen large, about as long as the sum of the three posterior thoracic segments, 

 oblong-ovate. The median lamella of the male operculum (fig. 1 1 g) about three times as long as broad ; 

 the inner pair of terminal lobes (fig. n h) much longer but much narrower than the outer pair. Se- 

 cond pair of pleopods described in the diagnosis of the genus. -- Female operculum (PI. XIV, fig. i b) 

 conspicuously broader than long, much shorter than the abdomen, somewhat convex but not carinate, 

 and posteriorly emarginate at the middle. Uropods in the female as long as, in the male somewhat 

 shorter than, the abdomen (fig. i a), and second joint nearly two and a half times as long as the first 



Length of a male 6 mm. (Tattersall recorded 7 mm.), of a female with marsupitim 5 mm., of a 

 female without marsupium 6 mm. 



Remarks.' In this description the differences between P.ocranica and the two other less well- 

 known species are indirectly taken into account The first thoracic leg was figured by Tattersall. 



Occurrence. Taken by the "Ingolf 1 at a station in the warm area. 



Davis Strait: Stat 36: Lat 6iso' N, Long. 562i' W., 1435 fath i t"P- ''5; * Pc. (mutilated j\ 



Besides, it has been taken by the "Thor" in young-fish trawl far south of Iceland, at Lat 6i3o* 

 N, Long. ^"offW., 1800 m. wire out, 3 spec. 



Distribution. Tattersall recorded it as taken twice west of Ireland, respectively in townet 

 from 730 to o fath. and in young-fish trawl, 1150 fath. Vanhoffen recorded it from the South Atlantic, 

 kat 35io / S^ Long. 233' E., vertical net from 3000 m. to surface. A badly preserved specimen from 

 the Sub-Antarctic Ocean: Lat 6i$9 S., Long. 95 i' E., vertical net from 2000 m. to surface, referred by 

 Vanhoffen to this species seems to me a little less certain, as he described and figured the molar 

 process of its mandibles as l>eing somewhat different from the usual shape. 



