222 



142. Parameira parva (Boeck). 



(PL CXLVI). 



Ameira parva, Boeck, Nye Slsegter og Arter af Saltvandscopepoder. Chr. Vid. Selsk. Forhandl. 



f. 1872, p. 49. 



Syn: Ameira longiremis, var. intermedia, Scott. 



Specific Characters. Female. Body short and stout, with the anterior 

 division scarcely longer and but very little broader than the posterior. Cephalic 

 segment shorter than the 3 succeeding ones combined, and somewkat narrowed 

 in front. Last segment of urosome shorter than the preceding one, anal opercle 

 greatly prominent, semilunar. Caudal rami very small, scarcely longer than they 

 are broad and somewhat obliquely truncated at the tip, apical setse not much 

 prolonged. Anterior antennae scarcely more than half as long as the cephalic 

 segment, some of the setse of the anterior edge distinctly ciliated. Posterior an- 

 tennae with the outer ramus very small and uninrticulate, carrying only 2 setae 

 at the tip. 1st pair of legs comparatively small, 2nd basal joint produced at the 

 inner corner to a conical process tipped with a strong denticulated spine, inner 

 ramus only slightly exceeding in length the outer, 1st joint rather thick, oval in 

 form, last joint about same length, but much narrower, linear, and, like the 2 

 preceding joints, fringed outside with coarse spinules, each of the joints carrying 

 inside a well-developed plumose seta. Natatory legs with the rami comparatively 

 narrow, and in the 2 anterior pairs, only little different in length. Last pair of 

 legs with the distal joint conical in form, being narrowly exserted at the tip, 

 marginal setse 5 in number and rather unequal, the 2 apical ones much smaller 

 than the others; inner expansion of proximal joint narrow triangular in shape, 

 and extending nearly to the middle of the distal joint, marginal setae 4 in number, 

 2 of them issuing from the inner edge. 



Colour whitish grey. 



Length of adult female 0.63 mm. 



Remarks. This form was first briefly described by Boeck as a species 

 of his genus Ameira. The form recorded by Th. Scott as Ameira longiremis, 

 var. intermedia, seems to be identical with Boeck's species, which may be regarded 

 as the type of the present genus. 



Occurrence. 1 have met with this form occasionally in several places of 

 both the south and west coasts of Norway, as also in the Trondhjem Fjord. It 

 is generally found in depths ranging from 20 to 50 fathoms, muddy bottom. 

 Not the slightest trace of eye could be detected in the living animal. 



Distribution. Scottish coast (Scott). 





