i6 



Campylaspis. 



Cainpylaspis sp. 



A solitary and very young male specimen belonging to this genus was obtairfed at 

 Station 142. It resembles very closely C. sulcata Sars, from which it differs in no conspicuous 

 character except size. Its length is about 1,2 mm. while specimens of C. sulcata at approximately 

 the same stao-e of development measure 1,9 mm. On account of its immaturity however I 

 hesitate to identify the specimen with C. sulcata which is at present only known from the 

 North Atlantic und Mediterranean. 



Family Diastylid.e. 

 Pseudodiastylis nov. gen. 



Carapace inflated, with long pseudorostrum. Telson with three terminal spines. Outer 

 ramus of antennules very long and stout, of five segments, inner vestigial, of three segments. 

 Third maxillipeds closely resembling first pair of legs. Third and fourth pairs of legs with 

 vestigial exopods in female. 



I. Pseudodiastylis fer ox n. sp. Plate II, figs. 15 — 25. 



Description of Female with ver^- small oostegites. Total length 14 mm. 



The carapace, including the long pseudorostrum, is two-fifths of the total length. It is 

 somewhat inflated, oval in outline as seen from above, the greatest width at a little behind the 

 middle being about three-sevenths of its length and a little greater than its height. Seen from the 

 side the dorsal oudine is strongly arched. The pseudorostrum is very long, directed obliquely 

 upwards, with a slight downward curvature, and pointed at the tip. There is no eye and the 

 ocular lobe is represented b)- a v&xy small vestige in front of which the pseudorostral plates 

 meet for about one-third of the total length of the carapace. The antennal notch is hardly 

 indicated and the slightly produced antero-lateral corner is tipped with several spines (PI. II, 

 ficr. 17). Anteriorly the lower margin bears a few spines. The whole surface of the carapace 

 is spinose, most of the larger spines being compound and of a peculiar form. Each consists 

 (PI. II, fio-. 18) of a rather stout cylindrical pedicel of varying length from the truncated top 

 of which a number of secondary spines radiate nearly at right angles to its axis. In the centre 

 of the top of the pedicel is implanted a single seta. On the dorsal surface of the carapace 

 anteriorly these compound spines are most fully developed (PI. II, fig. i8«), the pedicels being 

 lono-, about five times as long as thick, beset with scattered granulations and carrying from 

 five to eio-ht radiating spines which, though mostly broken oft" in the specimen examined, are 

 sometimes very long and slender. Towards the posterior part of the dorsal surface and towards 

 the lower edge the spines rapidly decrease in size and complexity (PI. II, fig. i8(5 and c). The 



