214 BULLETIN OF THE 



Haliporus doris, sp. nov. 



A larger and more robust species than H. nereus, with, a stronger upward 

 curve to the rostrum. The tubercular processes of the third pair of legs, to- 

 gether with the sternal tubercles immediately behind them, are very like the 

 corresponding structures in H. nereus. But here the likeness between the 

 sexual parts of the females of the two species ends. Betwixt the legs of 

 the fourth pair there is a transverse diaphragm consisting of a median tongue, 

 concave on its front face, its lower edge entire, supported on each side by a 

 strong blunt triangular process, of equal height with the median tongue-like 

 plate. Between the bases of the fifth pair of legs, in place of the low longi- 

 tudinal ridge seen in H. nereus, there is, in this species, a large setiferous tri- 

 gonal tooth, acute at the tip, equalling in height the transverse partition on 

 the sternum of the antecedent segment. The posterior median angle of this 

 tooth abuts against the low transverse ridge that forms the posterior limit of 

 the last thoracic sternum. 



Length, 104 mm.; rostrum, 10 mm.; whole carapace, 42 mm. 



Station 3414. 2232 fathoms. 4 females. 

 " 3415. 1879 " 1 female. 



Haliporus thetis, sp. nov. 



Integument membranaceous. Rostrum rather less than one third as long as 

 the '■est of the carapace, curved strongly upward, upper margin convex, armed 

 with five teeth. A distinct carina, bearing three teeth, runs the length of the 

 median line of the gastric area, from the base of the rostrum to the cervical 

 groove. Back of the cervical groove this carina continues on as a low blunt 

 ridge to the posterior border of the carapace. Posteriorly, this ridge gives off 

 two pairs of lateral branches, which course diagonally backward to the poste- 

 rior margin of the carapace, marking off two triangular fields on the cardiac 

 region, one enclosed within the other. The spinous armature of the carapace 

 consists of an antennal, a very small branchiostegal, an hepatic, and a lateral 

 spine on the posterior edge of the cervical groove. The spine which lies a 

 little way behind the branchiostegian spine in H. nereus and H. doris is lack- 

 ing in this species. Antennal and orbital regions well defined. All the seg- 

 ments of the abdomen are carinate along their median dorsal line. The pleurae 

 are shallow and rounded. A longitudinal furrow on each side of the abdom- 

 inal segments. Eyestalks one half the length of the rostrum; eyes large, 

 black, broader than their stalks. 



Length, 94 mm. ; rostrum, 9 mm. ; carapace, including rostrum, 33 mm. 



Station 3413. 1360 fathoms. 1 female. 



