33° DISCOVERY REPORTS 



for some distance beyond the rostrum : these antero-lateral portions are separated from 

 the rest of the head by a transverse ridge which runs from just behind the rostrum to 

 the lateral margin on either side. This character distinguishes the species from all other 

 deep-sea forms. The central portion of the head between the eyes is strongly convex 

 and is divided into three areas — "two round convexities which lie to the inner side of 

 and behind each eye, and a median T-shaped elevation, at the upper end of which, on 

 a level with the anterior portion of the eyes, are four tubercles arranged in a semicircle 

 with the concavity directed forwards ; at the hinder extremity is another short tubercle " 

 (Beddard, 1884 /!>, p. 54). The eyes are whitish yellow in colour. 



The posterior border of each of the third to seventh thoracic somites is produced into 

 a minute median dorsal spiniform process; the third, fourth and fifth somites are 

 separated by sutures from their coxal plates. The coxal plates are long and sickle-shaped 

 and increase in length from before backwards; those of the seventh thoracic somite 

 extend for a considerable distance behind the termination of the terminal segment and 

 are longer in the male than in the female. In the male the pleural plates of the second 

 abdominal segments extend beyond, whilst those of the third extend as far as the tip of 

 the terminal segment ; in the female those of the third segment hardly reach as far as 

 the extremity of the terminal segment. The terminal segment is broader than long, 

 somewhat pentagonal in outline, with the posterior extremity notched and slightly 

 turned up ; on its dorsal surface is a median longitudinal keel, and also, on either side, 

 a short flat spine, placed near the lateral margin on a level with the attachment of the 

 uropod. 



Remarks. There are two points in which my observations on this species difl^er from 

 those of Beddard. In the first place, he states in his description of the maxilliped, that 

 " the stipes and lamina are not separated by a complete suture ", or, in other words, that 

 the basipodite and lamella are not completely separated. In his figure (pi. iv, fig. 8), 

 however, he shows these two lobes as separated by a suture, but the coxal joint fused 

 with the epipodite. Actually the basipodite is separated by a suture from the lamella and 

 the coxa by a suture from the epipod. The second point is that Beddard describes the 

 third thoracic appendage of the male (p. 56) but calls it the second appendage, whilst 

 actually he omits any description of the second. The second appendage is of the usual 

 type and bears on its propodus alternating rows of two varieties of modified spines very 

 similar in appearance to those found in S. beddardi, Caiman (Fig. 3 b). 



Occurrence. Off" the east coast of New Zealand, in 1 100 and 700 fathoms, and close 

 to the Antarctic Ice-Barrier in 1975 fathoms. 



23. Serolis neaera, Beddard. 



5. neaera, Beddard, 1884 «, pt. iii, p. 331; Beddard, 18846, p. 57, pi. v, figs. i-ii. 



Occurrence. St. WS 212: 49° 22' S, 60° 10' W, 242-249 m.; 8 immature. 



St. WS 213: 49° 22' S, 60° 10' W, 249-239 m.; I $ (b.), i immature. 

 St. WS 236: 46° 55' S, 60° 40' W, 272-300 m.; 2 ?? (b.), 2 SS, i immature. 

 St. WS 244: 52° 00' S, 62° 40' W, 253-247 m.; 2 (?(?, 2 ?? (b.), 6 immature. 

 St. WS 773: 47° 28' S, 60° 51' W, 291-296 m.; 1 ? (b.), 3 immature. 



