DOXOMYSIS PELAGICA. 205 
DOXOMYSIS, gen. noy. 
Description (based on a mutilated adult female).— Body moderately 
slender.— Carapace anteriorly produced into a rather short, triangular, frontal 
plate terminating in a rostrum, posteriorly 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 manxillae (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; third 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. cee 
(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 
inwards 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. 
Plate 3, figs. 3a-8g. 
Sta. 4640. Novy. 6, 1904. Lat. 0° 39.4’S., long. 88° 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.— Eyes large, but in very damaged condition.— Antennal squama 
