458 Rev. Canon A. M. Norman on British Schizopoda 



Rostrum triangular, shorter than first joint of antennules ; 

 a spine on each side of the carapace in front of the 

 middle ; no spine over the base of the teLson ; telson 

 subequal to or rather shorter than uropods B. Raschii. 



Genus Thysanoessa. 



No spiue on side of carapace. Antennal scale elongated 

 and nnrrow, the extremity bhmtly but narrowly 

 rounded. First joint of antennules shorter than 

 combined length of the two following joints. A 

 spine over the base of the telson T, neglecta. 



No spine on side of carapace. Antennal scale elongated 

 and very naiTow, inner margin gradually sloping to 

 meet the outer, with which it unites at a terminal 

 point. First joint of antennules longer than com- 

 bined length of two following joints. No spine 

 over the base of the telson T. lonf/icaiuJata. 



Genus Nematoscelis. 



No spine on sides of carapace. Eyes very large, con- 

 stricted across the middle. First legs longer than 

 the body in adult N. megalops. 



A species has been found on the Norwegian coast — 

 Euphausia pellucida^ Dana { = E. bidentata, G. 0. Sars) — 

 which will probably be also met with in our own seas. It 

 may at once be distinguished from all the foregoing by these 

 characters : — 



Tico spines on each side of the carapace, one about the 

 middle and the other behind it. Antennal scale broad and 

 widely truncated at the extremity. First joint of antennules 

 furnished with a leaf-like la))pct (smaller than in Xi/cfij)hanes) 

 which is cut into two or many digital processes. The ventral 

 preanal spine is trifid. 



In the following list the words Mus. Nor. (Museum 

 Normanianum) indicate that specimens from all the localities 

 and collectors cited in the sentence preceding are in my 

 collection. For instance, examples of LopJwgaster typicus 

 arc in my possession from all the localities given except 

 " South of Cape of Good Hope." 



