1 8 CRUSTACEA MALACOSTRACA. IV. 



fig. 10 in the paper from 1873. In female specimens from 10 and 6 fathoms the pseudorostrum is a little shorter 

 and more obtuse than in specimens from deeper water, but the endopod of the uropods is normal ; it may be 

 added that in some of those specimens this endopod is scarcely as short in proportion to the exopod as in 

 typical specimens. 



Occurrence. - - Taken by the "Ingolf" at 4 stations. 



Davis Strait: Stat. 32: Lat. 6635' N., Long. 5638' W., 318 fath., temp. 3.9; ab. 44 specimens, 



some among them males. 

 Stat. 25: Lat. 633o' N., Long. 5425' W., 582 fath., temp. 3.3; 5 specimens. 



West of Iceland: Stat. 8: Lat. 6356' N., Long. 244o' W., 136 fath., temp. 6.0; i specimen. 



Near Jan Mayen: Stat. 115: Lat. 7O5o' N., Long. 829' W., 86 fath., temp. 0.1; i specimen. 



Furthermore it has been gathered by "Beskytteren" in two places at North Iceland, viz. in Skjal- 

 fandi, 10 fath., 2 specimens, and in Thorshofn, 6 fath., 2 specimens; at East Iceland it has been secured 

 by the "Thor" in Hjerads Floi, 28 47 fath., 2 specimens, and by Dr. A. C. Johansen in Breiddals Vik, 10 

 fath., sand, i specimen. 



Distribution. L. pallidus is known from two localities in Skager Rak, 125 and 350 fath., (H. J. 

 Hansen). At Norway it has been taken in Christiania Fjord, 50 to 230 fath., and in Hardanger Fjord, 150 to 

 400 fath. (Sars) ; in Throndhjem Fjord, 40 to 300 fath. (Norman), and at Lofoten, 300 fath. ; the "Thor" cap- 

 tured it south-west of Norway at Lat. 5832' N., Long. 4i8' E., 149 fath. Furthermore it has been taken 

 south of Spitzbergen at Lat. 76$' N., Long. I35' E., 1400 fath., and at Lat. 76i9' N., Long. i8V E., 146 

 fath. (G. O. Sars). Stappers recorded many specimens as taken south of Novaya Zemlya, in 48 fath., -together 

 with L. nasicoides, L. Nathorstii, L. Hdvus and L. acutirostris , and 2 specimens from the western part of the 

 Kara Sea, at Lat. 7i26' N., Long. 5629' E., captured in a vertical haul from the bottom, 200 met. to 150 

 met. -- Caiman recorded (1905) with a query a few immature and damaged specimens gathered west of 

 Ireland in 382 fath. ; his observation, that they possessed "on either side of the cephalic lobe, just above the 

 end of the lateral fissure, a small, inconspicuous denticle, sometimes two", makes the determination rather 

 uncertain. 



15. Leucon serratus Norman. 

 (PI. I, figs. 6a 6e). 



1876. Leucon serratus Norman, Proc. Royal Soc. Vol. XXV, p. 212 (nomen nudum). 

 1879. Norman, Ann. Mag. Nat. Hist. Ser. 5, Vol. Ill, p. 70. 



1913. Stebbing, Das Tierreich, 39. Lief. p. 72. 



Female (and immature Male). In general aspect intermediate between L. julvus and L. acuti- 

 rostris. In the ovigerous female the length of the carapace without pseudorostrum is in proportion to the free 

 segments combined as 62:54; the length of the carapace in proportion to the depth is as 49:36. The dorsal 

 edge serrated excepting on a short part considerably before the posterior end (in Norman's type the serration 

 is not interrupted). Frontal lobe without any lateral spine. Pseudorostrum feebly upturned, of very moderate 

 length, with its terminal portion somewhat deep, as its terminal margin is rather long, subvertical or somewhat 



