DOXOMYSIS PELAGICA. 205 



DOXOMYSIS, gon. nov. 



Description (based on a nuitilated adult female). — Body moderately 

 slender. — Carapace anteriorly produced into a rather short, triangular, frontal 

 plate terminating in a rostrum, posteriori}' not covering the entire cephalothorax. 



Eyes large, with short stalks. — Antennal squama (Plate 3, fig. 3a) scarcely 

 elongate, setose along both margins and with the end very obtuse. — Labrum 

 obtuse in front, without process. — Left mandible (figs. 3b and 3c) with the 

 incisive part, movable lobe, setae, and molar process well developed; the palp 

 about as in the genera allied to Mysis. — The maxillae (fig. 3d) shaped nearly as 

 in Michtheimysis Norm., with the terminal joint of the palp very large, much 

 expanded and broader than long, but the exopod with only a few short setae. 

 Maxillipeds (fig. 3e) with second joint long and terminating in a broad, well- 

 developed, setose lobe; thirtl and fourth joints very broad with broad, setose 

 lobes; fifth and sixth joints broad; seventh joint triangular with its claw shaped 

 as a thick seta. 



(Gnathopods wanting). — The endopod of a single thoracic leg was pre- 

 served; it is very slender, its fifth joint somewhat longer than the fourth and a 

 little shorter than the sixth; sixth joint divided into three subjoints by two 

 transverse articulations, the first a little before, the second a little beyond the 

 middle. 



Uropods slender, both rami-shaped and setose as in the Mysini; the endo- 

 pod below near the inner margin with a number of spiniform processes directed 

 'n wards and downwards. — Telson (figs. 3f and 3g) about half as long as the 

 uropods, distally deeply cleft with minute spines along the margins of the tri- 

 angular incision; the terminal lobes have the end broad and furnished with 

 some spines. 



Remarks. — The shape of the maxillipeds and of the terminal joint of the 

 maxillae seems to prove that the genus belongs to the tribe Mysini, while the 

 telson differs somewhat from that in genera hitherto known. 



23. Doxomysis pelagica, sp. nov. 



r 



Plate 3, figs. 3a-3g. 

 Sta. 4640. Nov. 6, 1904. Lat. 0° 39.4' S., long. SS° 11' W. Surface. 1 mutilated adult female. 



Description. — Frontal plate a little more than twice as broad as long, 

 terminating in a slender rostrum unfortunately broken off at some distance from 

 its origin. — Ej'es large, but in very damaged condition. — Antennal squama 



