383 



Last pair of legs much smaller than in female, with only 2 spines on the inner 

 expansion of the proximal joint, distal joint of a form similar to that in female 

 and exhibiting also the characteristic appendage inside the tip. 



Colour light yellowish grey. 



Length of adult female about 1 mm. 



Remarks. The above described form is unquestionably that recorded by 

 I. C. Thompson as Stenhelia denticulata. The characteristic spiniform expansion 

 of the 2nd joint of the anterior antenna? is alone sufficient for recognising the 

 present form from any of the other known species. 



Occurrence. I have only met with this elegant and comparatively large 

 species in a single locality, viz., at Kroshavn, south coast of Norway. It occurred 

 here not rarely on a coarse sandy bottom at a depth of about 20 fathoms. 



Distribution. British Isles (Thompson). 



AmphiaSCUS Normani, G. 0. Sars (new name). 



(Suppl. PI. 19, fig. 1). 



Stenlidia longirostris, Norman & Scott, Copepoda new to Science from Devon and Cornwall. 

 Ann. Mag. Nat. Hist. ser. 7. Vol. XV, p. 288 (not Amphiascus longirostris Glaus). 



Specific Characters. Female. Very like the preceding species, but of 

 smaller size and somewat less slender form of body. Anterior antenna? compar- 

 atively shorter and less attenuated, 2nd joint simple, without any trace of the 

 spiniform lappet found in A. dentieulatus, 4th joint only slightly longer than 3rd, 

 terminal part exceeding in length those joints combined. 1st pair of legs with 

 the outer ramus scarcely longer than the 1st joint of the inner, otherwise res- 

 embling in structure those in A. dentieulatus. Last pair of legs likewise very 

 similar in shape, the distal joint having outside the tip an appendage of the 

 same peculiar appearance as in that species. 



Colour not yet ascertained. 



Length of adult female 0.95 mm. 



Remarks. This form was at first briefly characterised by Messrs. Norman 

 and Scott in a preliminary paper published in the year 1905, and was subse- 

 quently more fully described and figured in "The Crustacea of Devon and Corn- 

 wall" by the same authors. The specific name longirostris proposed by those 

 authors cannot be accepted, since there is another species of the present genus 

 having this name given to it already by Glaus. I have therefore changed it in 

 honour to the one of the above-named authors. This species is very closely allied 

 to A. dentieulatus, so closely indeed, that I have been in some doubt about its 

 real specific difference. Having, however, found several specimens and in none 



