_416 



edge armed with a single rather strong spine, outer with a much smaller spine 

 in addition to the marginal bristles. 



t'ohmr not'yet ascertained. 



I . ii-th HI' adult female <>.S4 mm. 



/,' , '//,>. This form was also at first Described by Th. Scott as a species 

 ,,f ti,,. yenus Tetragoniceps, though the specific name proposed would seem to 

 indicate tin- doubt he had felt in referring it to that genus. In its external 

 appearance tin- present form mure resembles the type species of T<'trii<>u'ic< i>* 

 than do tin- other 2 forms treated of in the preceding pages. 



it urrence. Only very few specimens of this form have as yet come 

 under my notice. One of these, a fully developed male, was found in a sample 

 kindly sent to me by Mr. Nordgaard, who procured it from the Trold Fjord, 

 inside tin- Loiotni islands. The other specimens were derived from samples taken 

 last summer at Korshavn from depths of from 30 to 50 fathoms. 



/;,>/,,///, -Scottish coast (Scott). 



Gen. Leptastaeus, Scott, 



Generic <'hin-<n-t<'r. Body very narrow, but with rather hard integu- 

 ments. Rostrum small, hut well defined. Caudal rami more or less produced. 

 Anterior antennae slender, unarmed. Posterior antenna; with the proximal 

 joint not subdivided, outer ramus very small, uniartieulate. Anterior lip very 

 promiiiejit. Mandibles with the masticatory part securiformly dilated and coarsely 

 dentate, palp small, simple. Maxillae with the palp unusually prolonged and 

 without any traces of exopodal and epipodal lobes. Anterior maxillipeds more 

 dernier than usual, and having the apical part well defined. Posterior maxillipeds 

 powerfully developed, \\ith the basal joint short and unarmed, propodos exceed- 

 ingly larL'e and tumid, daclylus thin and accompanied at the base outside by a 

 slender bristle. M pair of legs very small and imperfectly prehensile, inner 

 shorter than usual, and Inarticulate. The 3 succeeding pairs of legs very 

 nder. with the inner ramus of moderate si/e and Inarticulate; outer ramus of 

 Hh pair much more elongated than in the other pairs. Natatoi\ setae in all 

 pairs much reduced in number. Last pair of legs comparatively small and 

 acuteh produced inside, distal joint very small or ipiite wanting. 



This -eniis established by Th. Scott is especially distinguished 



by the powerful and peculiar development of the posterior maxiliipecls. It also 

 conspicuously in the structure of the other oral parts and in that of the 



