CRUSTACEA MALACOSTRACA. II. 



with each other and differ from all other species known by two very peculiar characters: the lower 

 side of second and third joints of the antennae is furnished with strong, hook-shaped processes, and 

 the third joint of the three anterior pairs of thoracic legs bears an extremely long seta. But before 

 mentioning the differences between T. trispinosus and T. tenuicornis I may write some remarks on 

 Sars' description and figures of the last-named species. I have studied some co-types presented to our 

 Museum by Sars, and have drawn three analytical figures (PI. V, figs. 3 a 3c) for comparison with 

 my figures of T. trispinosus. 



Sars described and figured the antennae of T. tenuicornis as having two strong hooks on third 

 joint and none on second joint, but in his co-types I find two strong hooks on each of these joints 

 (fig. 3 a). Sars' figure of the second leg is not quite correct; I have found (fig. 3b) the very long seta 

 on the posterior angle of fourth joint, but no seta on the posterior angle of fifth joint; it does not 

 seem probable that the last-named seta exists though it has been drawn by Sars, but we have both 

 figured a moderately short and thin and a rather long, strong seta on the anterior angle of that 

 joint; finally, the seta on the anterior margin of sixth joint is very strong, nearly spiniform, and, as 

 also drawn by Sars, more than half as long as the joint, and seventh joint with claw is only as long 

 as fifth joint, being too long in Sars' figure. Third pair of legs (fig. 3c) nearly as drawn by Sars, 

 excepting that fifth joint has a minute denticle -- as in T. trispinosus and no seta at the posterior 

 distal angle, furthermore fourth joint has only a moderately long seta on the posterior angle. The 

 three posterior pairs of legs have their fourth and fifth joints adorned with rows of very fine spines 

 in the main as in T. trispisosus. 



T. trispinosus differs from T. tenuicornis especially in the armature of second and third antennal 

 joints and in the feebler development of setae on fourth to sixth joints of second pair of legs. The 

 difference in the armature of the antennal joints is easily seen from my descriptions and figures of 

 these parts of both species. A comparison of my fig. 3b with fig. 4c shows that the two long setae 

 found on the posterior angle of fourth joint and the anterior angle of fifth joint of second legs in 

 T. tenuicornis are wanting in T. trispinosus, furthermore that the stiff seta on sixth joint is propor- 

 tionately twice as long in the former as in the latter species. Finally it may be pointed out that an- 

 tennulae, antennae, chelipeds and thoracic legs are thicker in proportion to length in T. trispinosus 

 than in T. tenuicornis. The last-named species is known only from the west coast of Norway, from 

 depths ranging between 60 and 120 fathoms, and from Skager Rak, N. N. E. of the lighthouse of the 

 Skaw, 125 fm. (H. J. Hansen). 



Occurrence. T. trispinosus has been taken by the "Ingolf" at a single station. 



Davis Strait: 81.36: L,at. 61 50' N., Long. 56 21' W., 1435 fm., temp. 1.5; 17 spec. 



31. Typhlotanais profundus n. sp. 

 (PI. V, figs, sa-se.) 



Female (without marsupium). Body moderately robust, not fully six times as long as broad 

 (fig. 5 a). - - Carapace a little longer than the two following segments combined and about as long 

 as broad; the lateral margins conspicuously convex and the anterior end slightly more than half as 

 broad as the carapace somewhat before the posterior margin; the frontal process moderately large. 



7* 



