4? 



hensile and only composed of 2 unequal joints; rami of the succeeding 3 pairs 

 normal. Last pair of legs comparatively large, foliaceous, resembling in structure 

 those in the genus Pseudobradya. 



Remarks. This genus has been recently established by Dr. A. Brian, 

 to include a small Ectinosomid found by him among marine littoral algae 

 growing near the zoological laboratory of "Quarto dei Mille", Ligurian coast. 

 As observed by that author, the most essential distinguishing character of this 

 genus is derived from the structure of the 1st pair of legs, the inner ramus 

 of which is peculiarly transformed and very unlike that found in any other 

 form of the Ectinosomidae, being only composed of 2 joints and apparently 

 prehensile in character. Otherwise the genus seems to approach that of 

 Pseudobradya. A well-marked Norwegian species of this interesting genus 

 will be described below. 



37. Halophytophilus spinicornis, G. O. Sars, n. sp. 



(PI. XXIX). 



Specific Characters. Female. Body rather slender, broadest in front 

 and gradually attenuated behind, with no sharp demarcation between the 

 anterior and posterior divisions. Cephalic segment not fully attaining the length 

 of the exposed part of the trunk and, seen from above, obtusely rounded in 

 front; rostrum very coarse, acuminate, and curved downwards. The 3 suc- 

 ceeding segments each with a transverse row of small spinules across the 

 middle of the back, epimeral plates well developed and obtusangular behind. 

 Last trunkal segment only slightly smaller than the preceding one.. Urosome 

 somewhat exceeding in length 2 /a of the anterior division, and rapidly tapered 

 behind; genital segment rather large, though not fully attaining the length of 

 the 2 succeeding segments combined; anal segment very small and only slightly 

 incised behind in the middle. Caudal rami about the length of the anal seg- 

 ment and not at all divergent, each with a well-marked keel along the dorsal 

 face; apical setae very slender. Anterior antennae of moderate size and com- 

 posed of 6 well defined joints rapidly diminishing in width distally and clothed 

 with strong curved setae; 2nd joint armed, in addition to the setae, at the end 

 with a very strong thickish spine ; last joint very narrow and about the length 

 of the 2 preceding joints combined. Posterior antennae very strongly built, 

 with the terminal part (inner ramus) scarcely longer than the basal part, its 

 distal joint armed along the anterior edge with 4 coarse thickish spines, apical 

 setae 5 in number; outer ramus small, biarticulate with 2 slender setae at the 



