CRUSTACEA MALACOSTRACA. II. 



"3 



text shows that the animal cannot be C. Voringii. One small error may be noted, viz. that the English 

 authors stated the exopod of the uropods to be unjointed, while it certainly is two-jointed. 



Occurrence. C.arctophylax has been taken by the "Ingolf at two deep-water stations in 

 the warm area. 



Davis Strait: St. 24: Lat. 63°o6' N., Long. 56° 00' W., iigQfm., temp. 2.4°; i subadult male, i young 



female and i juvenile specimen. 

 — — St. 36: Lat. 6i°5o' N., Long. 56° 21' W., 1435 fm., temp. 1.5°; i adult male and i mut- 



ilated juvenile specimen. 

 Distribution. The only specimen mentioned in the literature is the type, which has been 

 dredged by the "Porcupine" at Lat. se'' 24' N., Long. 11° 49' W., "midway between Ireland and Rockall", 

 1380 fathoms. — C. arctophylax has only been found in the warm area, while C. Vorhigii is confined 

 to the cold area. 



Tanaella Norm. & Stebb. 



This genus was established on a single specimen of a new species, T. unguicillata Norm. & 

 Stebb., and I possess a specimen of this species and a specimen of a hitherto unknown form; all three 

 specimens hitherto known are females without marsupium. The genus is related to Leptognathia 

 but differs in some particulars. A brief description of the genus may be given here. 



Body somewhat robust. The antennulae have the second joint longer than third and fourth 

 joints combined, and the third joint is very short. Chelipeds unusually robust. Anterior pairs of 

 thoracic legs have the rather long .sixth joint longer than the seventh with claw; while on the post- 

 erior pairs sixth joint is considerably shorter than seventh with claw. Five anterior abdominal seg- 

 ments very short and peculiarly shaped so that they, seen from the side, are somewhat augularh- 

 bent at the median lateral line; sixth segment long, at least as long as the four preceding segments 

 combined. Pleopods either small without setse or wanting. Uropods robust, with a styliform, unjointed 

 endopod and no exopod. (Mouth-parts, marsupium and male unknown). 



Remarks. Tmiaella is related to Strongyliira in having the sixth abdominal segment very 

 long in proportion to the five anterior segments, but the whole abdomen in Tanaella is shorter in 

 proportion to the thorax than in Strongylura. In the diagnosis of Tanaella Norman & Stebbing 

 stated that no pleopods are found, but this feature cannot be maintained as a generic character, 

 because my new species T. ochracea is closely allied to T. unguicillata excepting in the single feature, 

 that it possesses small pleopods. The structure of the uropods seems to be a good character; besides the 

 antennulje and the elongate terminal part of the posterior pairs of legs seem to afford generic characters. 



71. Tanaella ochracea n. sp. 

 (PI. XI, figs.3a-3f.) 



Female (without marsupium). Moderately robust (fig. 3a), a little more than six times as long 

 as broad, subcylindrical, tapering slightly in breadth from the carapace to sixth abdominal segment, 

 which is conspicuously broader than the preceding abdominal segments. — Carapace somewhat longer 



The Ingolf-Expedition. III. 5. 15 



