112 



Remarks. This form was at first recorded by Messrs. Brady and Robertson 

 under the name of Solenostoma scutatum. The generic name being however 

 preoccupied, it was redescribed and figured by the former author in his 

 monograph under the above name. It is a very distinct and easily recognizable 

 form, especially distinguished by the unusually short anterior antennae and the 

 extraordinary development of the siphon. 



Occurrence. I have met with this form in 2 different localities on the 

 west coast of Norway, viz., at Kalvaag and Aalesund. In the latter place it 

 occurred not unfrequently at a depth of about 10 fathoms among alga? and 

 other marine growths. 



Distribution. British Isles (Brady), coast of France (Canu), Mediter- 

 ranean (Glaus, Giesbrecht). 



Fam. 6. Myzopontiidae. 



Characters. General form of body resembling that in some of the Asco- 

 myzontidos, being comparatively slender, with the anterior division moderately 

 broad, and the cephalic segment scarcely projecting at the postero-lateral cor- 

 ners. Tail rather produced and of quite normal appearance, being composed in 

 female of 4, in male of 5 segments. Anterior antennae slender, with the number 

 of joints somewhat reduced; terminal part not defined, the usual eesthetask 

 issuing from the last joint, near the tip. Posterior antennae comparatively small, 

 but with the terminal joint more developed than in the Ascomyzontidce, outer 

 rarnus rudimentary. Oral cone more or less produced. Mandibles without 

 any palp. Maxillae and maxillipeds on the whole normal. Natatory legs 

 resembling in structure those in the Ascomysontidoe. Last pair of legs with 

 the proximal joint imperfectly defined from the segment, distal joint very small 

 or of moderate size. 



Remarks. This is another family, which I have found it necessary to 

 establish in order to include the 2 genera Myzopontius and Neopontiu8 : the 

 systematic position of which has appeared rather doubtful. Giesbrecht refers both 

 these genera to his sub-fomily Dyspontiince, apparently on account of the somewhat 

 similar structure of the anterior antennae; but in other respects they differ very 

 conspicuously from the true Dyspontimai, both as regards the outward appearance of 

 the body and the structural details, while on the other hand they exhibit, several 



