3° 



CRUSTACEA MALACOSTRACA. II. 



The abdomen somewhat longer than tlie two posterior thoracic segments combined. Pleojaods 

 well developed, with long setse. — Uropods (fig. id) with very long terminal setae; endopod somewhat 

 robust with the proximal joint slightl\- longer than the distal; exopod only a little shorter than the 

 endopod but considerably thinner, with the proximal joint slightly shorter than the distal. 



Length of a female with the marsupial lamellae less than half developed 1.9™"'. 



Remarks. P. oculatus differs from P. forcipatus and P. Lilljcborgii \>y possessing well devel- 

 oped pleopods, the exopod of the uropods much longer than the proximal joint of the endopod, etc.; 

 it differs from P. ahyssi in the chelae, shorter and proportionately thicker legs, longer exopod of the 

 uropods, etc., from P. affhiis b\' features in nearly all appendages. It is on the whole more allied to 

 P. incditcrrancits G. O. S. than to anj' species described in the present paper, but differs from it in 

 having the claw of second pair of legs shorter and in various minor features in the antennae and 

 thoracic legs. And above all it differs from P. nicdifcrraneiis and all species described from Norway 

 or in the present paper in possessing real eyes with several well developed corneae. 



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



Davis Strait: St. 34: Lat. 65° 17' N., Long. 54° 17' W., 55 fm.; i .spec. 



Besides it has been captured at West and East Greenland by three other collectors. 



West Greenland: Upernivik, Lat. 72°48' N., July 21, 1887; i spec. Ryder. 



Davis Strait: Lat. 65° 27' N., Long. 54° 45' W., 67 fm., temp. 1.1°; i spec. Wandel. 



East Greenland: Angmagsalik, ab. Lat. 65°3o'N. Aug. 7, 1902; x spec. Mag. sc. Kruuse. 



18. Pseudotanais affinis H. J. Hansen. 

 (PL III, figs. 2a — 20, and? figs. 3a — 3b.) 



1886. Pseudotanais affinis H. J. Hansen, Dijmphna-Togtets zool.-bot. Udbytte, p. 207; Tab. XXI, 



Fig. 2 (Female). 

 — — crassicornis H. J. Hansen, 1. c. p. 208; Tab. XXI, Fig. 3, 3a (Subadult Male). 



Female. The body about five times as long as broad. — Front margin of the head only 

 about one- third as long as the breadth of the carapace (fig. 2 a), somewhat sinuate, being conspicuously 

 convex at the middle, a little emarginate behind each antennula and with the lateral angles distinctly 

 produced. No eyes. 



The antennulae are moderately long, somewhat more than half as long again as the carapace 

 (fig. 2a). First joint, seen from the side (figs. 2b and 2d), with the basal fourth considerably expanded 

 below, four and a half to five times as long as deep, at the base broader than deep and seen from 

 above (fig. 2 a) abruptly narrowed slightly beyond the middle. Second joint about three times as long 

 as deep; third joint slender, from a little longer to one-third as long again as the second. — Antennae 

 moderately slender; second and third joints (fig. 2d) on the distal upper angle with a .spiniform, strong 

 process; fourth joint nearly two and a half times as long as the penultimate. 



Chelipeds rather slender. Chela (fig. 2e) more slender than in the preceding species, from a 

 little more than three times to more than three and a half times as long as broad, with the posterior 

 margin considerably concave at the middle; the fixed finger moderately slender and tapering from 



