CRUSTACEA MALACOSTRACA. III. 



37 



Thoracic segments and coxae are most frequently scantily haired, but sometimes clothed with 

 numerous hairs. The coxae of second to fourth pairs of legs with a subcorneal or rounded protuberance 

 at the middle of their outer margin, but in the small, hairy specimens from Stat. 78 these tubercles 

 could not be discovered; the coxa; of the three posterior pairs of legs each with a single spine (fig. 

 3 b) or sometimes with two spines. 



Abdomen (the free basal segment not included) is oblong-ovate (fig. 3 b), broadest much before 

 the middle, not much varying as to breadth and generally about half as long again as broad. On the 

 sides a single pair of spines are found, and in adult specimens the upper surface and the posterior 

 half of the sides have in all about four pairs of long or very long spines, and the posterior margin 

 has a pair of very long, thin spines; some or most of these spines are frequently broken off, and at 

 least sometimes they are partly or entirely wanting in not full-grown specimens. — Uropods about as 

 in J/. Boeckii. 



The median lamella of the male operculum (figs. 3 g— 3 h) has no ventral spines, and is some- 

 what less than three times as long as broad, broadest somewhat from the base, then tapering to the 

 end of the second third of the length, and then very feebly diverging to the end; the hind margin of 

 each pleopod has at the outer margin a minute tooth directed backwards, and is slightly sinuate and 

 oblique so that the margin of the whole lamella is feebly emarginate, especially at the middle; in 

 the specimen from Stat. 81 the lamella is a little more widened towards the end, and its distal part 

 is shaped as in M. Boeckii. 



Length of a large female with marsupium 3 mm., of a male 2-9 mm. 



Remarks. M. Hanseni is allied to M. Boeckii in most characters, but is instantly distinguished 

 by the reduced eyes; the armature with spines on the abdomen of adult and many not-adult specimens 

 is also characteristic. 



Occurrence. Taken by the "Ingolf" at four stations. 



South-West of Iceland: Stat. 78: Lat. 6o°37' N., Long. 27°52' W., 799 fath., temp. 4-5°; 9 small spec. 



Stat. 81: Lat. 6i°44' N., Long. 27°oo' W., 485 fath., temp. 6-i°; 1 spec. 



North of Iceland: Stat. 126: Lat. 6y°i()' N., Long. i5°32 W., 293 fath., temp. -^-0-5°; 3 spec. 



West of the Faeroes: Stat. 44: Lat. 6i°42' N., Long. 9°36' W., 545 fath., temp. 4-8°; 14 spec. 



Distribution. Only known from a place at the south coast of Novaya Zemlva, Lat. jo°2o' N., 

 Long. 56°35' E., 48 fath. (Stappers). 



20. Munna Kroyeri Goodsir. 

 (PL III, figs. 4 a— 4 b). 

 1842. Munna Kroyeri Goodsir, Edinb. New Phil. Journ. Vol. XXXIII, p. 365; PI. VI, fig. 6 (teste Sars). 

 ! 1897. G. O. Sars, Account, II, p. 109; PI. 46, fig. 1. 



This stout, short-legged species has been well figured and described by Sars; I have examined 

 6 co-types presented by him. -- Median lamella of the male operculum (figs. 4 a— 4 b) without ventral 

 spines, somewhat more than twice as long as broad, broadest somew-hat from the base and tapering 

 considerably somewhat from the end, where it widens rather rapidly to the end; the outer distal angle 



