190 



seem to be fairly constant, the most conspicuous of them -being the structure of 

 the caudal setse and the form of the ovisacs. 



Occurrence, I have found this form not unfrequently off the south coast 

 of Norway, at Risor and Lillesand, at moderate depths among algse. 



Distribution. Scottish coast (Scott). 



126. Stenhelia longieaudata, Boeck. 



(PL CXXV, fig. 1). 



Stenhelia longieaudata, Boeck, Nye Slsegt^r og Arter af Saltvandscopepoder. Chr. Vid. Selsk. 



Forh. 1872, p. 49. 



Syn: Delavalia reflexa, Brady (part). 

 minutissima, Scott. 



Specific Characters. Female. Body rather short, and robust resembling 

 somewhat that of 8. reflexa. Rostrum rather prominent and attenuated distally, 

 apical part very minute and transversely truncated at the end. Genital segment 

 conspicuously dilated in its proximal half, remaining part of urosome only slightly 

 attenuated, anal segment about the length of the preceding one. Caudal rami 

 very narrow and elongated, exceeding in length the 2 preceding segments com- 

 bined, and widely apart, apical setae of moderate length and normal appearance. 

 Anterior antennas of the usual structure. Posterior antennae with the outer ramus 

 shorter than the last joint of the inner. Oral parts of quite normal structure. 

 1st pair of legs with the outer ramus considerably longer than the inner, middle 

 joint provided inside with a short seta, last joint rather shorter and armed with 

 2 slender spines and 2 setaa; inner ramus biarticulate, distal joint quite short, 

 scarcely half as long as the proximal one, and provided inside with a small seta, 

 tip carrying 3 setaa, the middle one being much the largest and remarkably 

 thickened at the base, terminating in a very delicate and finely ciliated lash. 

 Natatory legs of the usual structure. Last pair of legs with the distal joint pro- 

 nouncedly spatulate in form, and provided with* 6 setaa, 2 of which issue from 

 the outer edge, innermost seta very slender and elongated; inner expansion of 

 proximal joint very slight and exhibiting near the insertion of the distal joint a 

 small, but rather conspicuous incision, marginal setse slender and 4 in number, 

 the outermost issuing close to the next, and being smaller than the others. Ovisacs 

 of moderate size and rather divergent. 



Male with the inner ramus of 2nd pair of legs rather peculiar in shape, 

 the proximal joint being strongly dilated and without any seta inside, distal joint 



