228 "TERRA NOVA" EXPEDITION. 



Occurrence. — Cumberland Bay, S. Georgia, December, 1913, collected by P. 

 Stammwitz, two females. 



Eemarhs. — The two specimens respectively measure 12 mm. long by 9' 5 mm. 

 broad, and 1 1 mm. long by 8 " 5 mm. broad. There is nothing to add to PfefFer's 

 detailed and careful description, or to the more recent account of this species 

 given by Collinge. One point only requires remark. CoUinge describes and figures 

 only one kind of sensory spine on the inner margin of the propodus of the second 

 thoracic limb. Pfeffer, however [loc. cit., pi. Ill, figs. 13-15), gives detailed figures 

 showing both kinds of sensory spines. My own observations agree absolutely with 

 those of Pfeffer, whose account of this species has evidently been overlooked by 

 Collinge. 



36. Serolis glacialis, n. sp. PI. W-l, figs. 1-5. 



Occurrence.— ^tSiXiion 194, ofi" Gates Land, 69° 43' S., 163° 24' E., 180-200 

 fathoms, bottom fauna, one male, 17 mm. long, 14 '5 mm. broad. 



Description. — Body (pi. VII, fig. l) broadly oval, slightly longer than broad, the 

 breadth being about -f- of the length, rather fiattened and semi-translucent, especially 

 laterally. 



Head (pi. VII, fig. 1) very nearly twice as wide as long, shield-shape in outline, 

 convex, with a small but well-marked pointed rostral process between the bases of the 

 antennules ; behind the rostrum there is a well-marked transverse keel or ridge, which 

 runs laterally to the sides of the cephalosome ; behind this again, between and in a 

 line with the anterior end of the eyes, there is a short transverse well-marked ridge, 

 immediately posterior to which is a deep groove ; the portion of the head between the 

 eyes is very convex, and divided into three more or less equal oval prominences, the 

 posterior margins of which are much more sharply defined than the anterior, where 

 the prominences merge in the general surface of the body ; this portion of the 

 cephalosome is roughened by irregular anastomosing ridges. 



Eyes large, about half as long as the head, reniform, pigment black. 



As in all Serolidae, the second thoracic somite united with the head, the lateral 

 portion with two transverse ridges on each side, the anterior one commencing at the 

 point at which the anterior ridge of the head meets the lateral margin of the head, 

 the second one commencing some little way behind this point, and both running 

 at first transversely and finally outward and backward, fading away into the lateral 

 margins ; third to seventh somites with well-developed coxal plates, those of the 

 third to fifth somites marked off by distinct sutures ; in the median dorsal line each 

 of the third to the seventh thoracic somites is produced into a short but distinct 

 median dorsal spiniform process ; the coxal plates of the seventh thoracic somite 

 are much more produced than those of any of the other thoracic somites, and extend 

 about to the level of the basal joint of the uropods. 



