17 



than in female, and carrying inside 7 ciliated bristles, inner ramus armed inside 

 with a dense row of small, ciliated spinules. Colour pure white. Length of female 

 reaching to 8 mm., of male 7 mm. 



It<'irkx. This is an easily recognizable form, highly remarkable for the 

 exceedingly tumid, almost globose carapace, and the slender and elongated tail. 

 From the other known species it is at once distinguished by the perfectly smooth 

 and boldly vaulted carapace, the distinctly projecting pseudorostral prominence, 

 and the total absence of eye. Moreover, in the structure of the several appen- 

 dages several well-marked differences are to be found. 



Occurrence. I first detected this interesting form off the Lofoten Islands, 

 and have subsequently met with it occasionally in several other places on the 

 Norwegian coast, for instance in the Trondhjem and Hardanger Fjords, at Aale- 

 sund and Christiansund. It is a true deep-water form, being only found in 

 depths of more than 100 fathoms. Of the adult male, only a solitary specimen, 

 that here figured, has come under my notice. Young males are, however, almost 

 as frequent as females. 



Distribution. Off the Spanish coast (Porcupine Exp.) and in the North 

 Atlantic (Valorous Exp.), in both places, according to the Rev. A. M. Norman, 

 in very considerable depths, down to 1450 fathoms; Gulf of Gascogne (Bonnier) 

 in 960 metres. 



Fam. 2. Lampropidae. 



Characters. Body more or less slender, somewhat resembling in form 

 that of the Cumidce. Integuments, as a rule, thin, distinctly squamous. Cara- 

 pace, as a rule, rather small, with no sinus below the pseudorostral projection; 

 the latter generally very small. 1st pedigerous segment well defined. Last 

 caudal segment truncated behind, and carrying a well-developed telson. Eye 

 present or wanting. Superior antennae with both flagella distinctly devel- 

 oped and not very unequal in length. Inferior antenme in female less rudi- 

 mentary than usual, being nearly as large as the superior, and divided into 

 4 or 5 successive joints. Oral parts on the whole normal. Palp of anterior 

 maxilla- short, bisetose, in some cases wholly wanting. Branchial apparatus 



3 Crustacea. 



