312 



culocles and named longicornis probably on account of the unusual length of 

 the superior antennae in proportion to the inferior ones. It is easily recog- 

 nized from any of the other (Ediceridae both by its outward appearance 

 and by several anatomical characteristics, especially the structure of the 

 posterior gnathopoda. 



Occurrence. — The only place on the Norwegian coast, where I have 

 met with this form, is at Vadse. It occurred here rather sparingly in a depth 

 of 10 — 20 fathoms, sandy bottom. Mr. Schneider has also found it in the 

 neighbourhood of Tromso, and Boeck states its occurrence as far south as 

 Haugesund, west coast of Norway. 



Bistribntion. — Off Jan Mayen (Norw. North Atl. Exped.). 



Gen. 5. Perioculodes, G. 0. Sars, n 

 Sjni.: Mouoeulodes Boeck (part.). 



Body comparatively short and stout, with moderately deep coxal 

 plates. Cephalon forming in front a very short deflexed rostral projection. 

 Eyes confluent above, and extending down the sides of the cephalon until 

 the lateral corners, thus forming a continuous coating, surrounding the 

 anterior part of the cephalon, visual elements few in number and highly 

 refractive, though of rather fragile consistency. Superior antennae in female 

 longer than the inferior, with the last joint of the peduncle very much elongated 

 and narrow; those in male having the outer joints of the peduncle shorter 

 and thicker, and the flagellum more strongly developed. Inferior antennae in 

 male with the flagellum elongated, filiform. Anterior lip rather broad, and 

 transversely truncated at the tip; posterior lip with the inner lobes coalesced. 

 Mandibles not very strong, molar expansion i)oorly developed, and tipped with 

 3 small spinules, but without the usiial fluted triturating surface, palp in 

 female rather small, with the last joint short; in male considerably larger. 

 Maxillae about as in Monoculodes. Maxillipeds with the masticatory lobes 

 rather large, nearly extending to the end of the antepenultimate joint of the 

 palp, and armed on the inner edge with distant slender spines. Gnathopoda 

 nearly equal in structure, thovigh the posterior ones are .somewhat more slender 

 than the anterior, propodos in both pairs very narrow, sublinear, carpus pro- 

 duced at the end inferiorly to a very long and slender styliform process 



