CRUSTACEA MALACOSTRACA. II. 



45 



claw less than half as long as sixth joint Sixth and seventh pairs (fig. 40) much shorter than the 

 anterior pairs; second joint about three and a half times as long as broad; fourth and fifth joints very 

 moderately thickened towards their end, sixth joint somewhat long and slender, twice as long as 

 seventh joint with claw. 



Abdomen proportionately long, in the contracted specimen (fig. 4 a) even slightly shorter than 

 the three posterior thoracic segments combined. Uropods (figs. 4 a and 4d) long; endopod two- 

 jointed, with first joint somewhat longer than second; exopod slightly shorter than the endopod, two- 

 jointed, with the proximal joint about half as long as the distal. 



Length of the largest specimen 1.50""", of the contracted specimen (fig. 4 a) 1.19 mm . 



Immature Male. A single specimen, only i.o mm long, is at hand, and its most important 

 parts are rendered in figs. 46 4g. Some of the differences between this specimen and the two above- 

 described females are due to sex, other differences probably to age. The antennulse are considerably 

 thicker than in the female; first joint, which is as long as the two other joints combined, is only 

 three times as long as deep and tapers slightly towards the end; second joint is conspicuously less 

 than twice as long as deep, third joint more than twice as long as the second. - - Antennae with fourth 

 joint distinctly less than twice as long as the penultimate joint. - - The chela is slightly thicker than 

 in the female with the hand conspicuously less elongate in proportion to the length of the movable 

 finger. - The anterior pairs of legs are a little thicker in proportion to length than in the larger 

 female. Uropods with the rami equal in length. 



Remarks. T. eximius is easily distinguished from all other species by its very slender chel- 

 ipeds with the very elongate chelae and the hand very long in proportion to the fingers. In all other 

 features it is allied to T. penicillatus G. O. S., differing only in various minor particulars, among which 

 the most conspicuous is the fact, that in T. penicillatus the exopod of the uropods (fig. 5c) reaches 

 scarcely or slightly beyond the middle of the second joint of the endopod. 



Occurrence. Taken by the "Ingolf" at a single station. 



South-West of Iceland: 81.78: L,at. 60 37' N., Long. 27 52' W., 799 frn., temp. 4.5; 3 spec. 



27. Typhlotanais penicillatus G. O. Sars. 



(PL IV, figs. 5 a-5d-) 



1881. Typhlotanais penicillatus G. O. Sars, Arch, for Math, og Naturv. B. 7, p. 39. 

 ! 1896. Account Crust. Norway, Vol. II, p. 25, PI. XI, fig. 3. 



The -'Ingolf specimens agree well with Sars' description and figures of this species excepting 

 that the setae on the chelipeds are considerably longer, but that may be due to an accident or a slight 

 error. Furthermore Sars stated that the exopod of the uropods is one-jointed, while it is two-jointed 

 in my specimens, but the articulation between the two joints is not always really distinct. 



T. penicillatus is closely allied to T. eximius 11. sp., but differs especially in having the cheli- 

 peds shorter and much thicker and in having the exopod of the uropods (fig. 5c) conspicuously 

 shorter than the endopod; furthermore the antennulae, antennae and anterior thoracic legs (fig. 5 a) are 

 in my largest specimens conspicuously shorter and thicker than in T. eximius; third pair of legs with 



