130 DTf. U. Jj nANSEN 01?" THE maOJjVlY.JAAVJE, 



thev are absent (pi. 8G) ; furthermore, the lobe has com- 

 pletely disappeared iu Anamixis Hanseni^ Stebbiug; (op. cifc. 

 p. 36, pi. 11). That the eyes have altogether disappeared 

 in J. abyssi is not surprising, but it is very curious that they 

 are also entirely wanting in /. UttoraMs, procured at a depth 

 of only 1 fathom on the coast of an island surrounded by 

 shallow water. So far as I know, no blind Amphipod living on 

 the shore has been described. The antennulse and antennae of 

 Inqolfiella are rather short and with very few bairs ; tliey differ 

 much from the same appendages in Corophiidse and Dulichiidge. 

 The five posterior pairs of thoracic legs differ in general aspect 

 by being slender and sbort, but the third and f ourbb pairs differ 

 more materially in that the seventh joint and the claw do not 

 resemble a " claw " as in the Coropdaiidse, Dulichiida^, and 

 probably all other Gammarina. 



III. Diagnosis of the Family. 



That Ingolfiella must form the type of a new family, the 

 Ingolfiellidse, is, iu my opinion, proved by the statements in 

 the preceding section. The diagnosis of the family may be as 

 follows : — 



Body filiform, with the basal joint of the thoracic legs small, 

 not developed as " epimeral " plates. Separate eye-lobes 

 (without eyes) developed from the antero -lateral margin of the 

 head. The antennulse with accessory flagellum. The mandible 

 with elongate styliiorm acute molar pi-ocess. The first joint 

 of the well-developed palp of the maxillulse longer than the 

 second. The maxillipeds only with the major part of their first 

 joints coalesced with each other; the third joint without lobe. 

 The first segment of the thorax more closely connected with, the 

 head than with the second segment. The two anterior pairs 

 of thoracic legs with a well-developed hand formed of the fifth 

 segment, while the rest of these legs is claw-shaped ; the pre- 

 hensile hand of the first pair larger than the following pair. 

 The third and fourth pairs of thoracic legs with a thin claw 

 inserted on a much broader seventh joint. The abdomen long, 

 with all the segmeiits well separated from each other ; the 

 terminal joint of the sympod of the pleopods developed as a 

 triangular plate without vestige of rami, hairs, or coupling-hooks. 



