80 



very dissimilar in these two families, only the anterior lip exhibiting some approach 

 to the structure characteristic of the Campylaspidce. The genus Spenccbatea of 

 Norman may perhaps be referable to the present family ; but this genus is as 

 yet very imperfectly known, only a solitary male specimen having been procured. 

 The genus Diops of Paulson, I regard as identical with Sp. Bate's genus Nanna- 

 stacus. In the Norwegian Fauna, only one of the two genera is represented. 



Gen. Climella, G. 0. Sars, 1864. 



Generic Characters. Body of rather different appearance in the two sexes. 

 Carapace in female somewhat compressed, and provided with a dentated crest 

 along the middle, in male quite smooth throughout; pseudorostral projection more 

 or less produced. Tail in both sexes very slender and mobile, with the last 

 segment angularly produced behind. Integuments rather thin, and exhibiting a 

 distinctly squamous structure. Eyes confluent to a single organ occupying its 

 usual place at the end of the frontal lobe, and much more fully developed in male 

 than in female. Superior antenme rather slender, with the inner flagellum biarticulate 

 or uniarticulate. Inferior antenna in female biarticulate, with 2 plumose setse inside, 

 terminal joint extremely small and tipped with a simple bristle; those in male with 

 the penultimate joint of the peduncle well defined, and clothed with unusually long 

 sensory filaments. Anterior lip produced in front to a conical prominence. Man- 

 dibles rather slender, with the cutting part narrowly exserted, and provided with 

 only a limited number of spines inside, molar expansion short and thick. Maxillse 

 of quite normal structure. First pair of maxillipeds with the terminal joint 

 lamelliform, epipodal part of branchial apparatus in female quite simple, in male 

 provided with a limited number of digitiform gill-elements. Second pair of maxilli- 

 peds with the basal joint much shorter than the remaining part, and carrying 

 inside 2 unusually strong plumous setae; 3rd pair with the basal and meral joints 

 produced at the outer corner, the former carrying 2, the latter 1 strong ciliated 

 seta. First pair of legs with the basal joint comparatively short and thick, ter- 

 minal part slender; 2nd pair normal; the 3 posterior pairs successively diminishing 

 in length. Uropoda moderately slender, with the rami shorter than the stem, the 

 inner one the larger and spinulous inside. 



Remarks. This genus, established by the present author in the year 1864, 

 is at once distinguished from Nannastacus of Sp. Bate by the eyes being confluent 



