55 



manner and crossing the neighbouring seta at some distance from its base. 

 Anterior antennae composed of 5 joints, the first 2 of which are much the 

 largest, outer part of the antenna, as in the type species, abruptly recurved 

 and densely clothed with strong curved setae. Posterior antennae and oral 

 parts built on the same type as in S. divaricata. Natatory legs likewise rather 

 similar in structure, the inner ramus being in all of them only composed of 

 2 joints. Last pair of legs resembling in shape those in the type species, 

 though having the inner expansion more distinctly defined and the marginal 

 setae considerably longer. Ovisacs small, each containing only a single ovum. 



Colour whitish. 



Length of adult female 0.63 mm. 



Remarks. The present form is closely allied to the type species, 

 vS 1 . divaricata G. O. Sars, but of somewhat larger size, differing moreover in 

 the comparatively less slender caudal rami, as also somewhat in the structure 

 of the anterior antennae and the last pair of legs. 



Occurrence. Some specimens of this form, all of the female sex, were 

 found at Riser in depths ranging from 30 to 50 fathoms, muddy bottom. 



Fam. Canthocamptidae. 



Gen. Attheyella, Brady. 

 45. Attheyella Schmeili, (Mrazek). 



(PI. XXXV). 



Canthocamplus Schmeilii, Mrazek, Beitrag zur Kenntniss der Harpacticidenfauna des Siisswassers. 

 Zool. Jahrb. Vol. 7, p. 116, PI. 7, figs. 107117. 



Specific Characters. Female. Body comparatively slender and only 

 slightly tapered behind, with all the segments distinctly denticulated along the 

 hind edge dorsally. Cephalic segment about the length of the 3 succeeding 

 segments combined, and broadly rounded in front, without any distinctly defined 

 rostral projection. Urosome almost as long as the anterior division; genital 

 segment somewhat shorter than the 2 succeeding segments combined; last 

 segment well developed and of about same size as the preceding segment; 

 anal opercle only slightly prominent, and obtusely truncated at the end, with 

 the edge very finely denticulated. Caudal rami comparatively large, exceeding 



