NO. 1479. NEW ISOPOD CRUSTACEAXS—RICHARDSON. 11 



side in a small point, overlapping the terminal segment. The terminal 



abdominal segment has two large elevations or prominences on the 



convex basal part, one on either of the median line, the two being 



separated by a furrow. The terminal part of the 



segment has a median notch, which is conipletel}" 



filled )>y a large, triangular lobe, rounded at the 



apex and slightly exceeding in length the lateral 



angles, which are truncate posteriorly. The uro- 



pods do not extend beyond the lateral angles of the 



terminal segment of the abdomen. The branches p^^ ^^ — cymodoce bra- 



are about equal in length, the outer, movable siliexsis. abdomex 



1 V,!' 11 1'J}1T 1 iU' AND LAST THOBACICSEG- 



branch t)euig capable ot toldmg under the inner meni- offemale. x eh 

 branch. The inner branch is truncate at the ex- 

 tremity, with a slight excavation about the center. The inner post- 

 lateral angle of the outer liraiich is rounded, the outer post-lateral 

 angle being acute. 



The specimen descril)ed is a female. 



Four perfect specimens and one imperfect specimen come from off 

 Cape St. Roque, Brazil. They were collected by the U. S. Bureau of 

 Fisheries steamer Alhatross^ at a depth of 20 fathoms, among broken 

 shells. 



The types are in the U. S. National Museum, Cat. No. 32246. 



CYMODOCE AFFINIS, new species. 



Body ovate, a little more than twice as long as wide, 8 mm. : ITi mm. 

 Head transverse, twice as wide as long, 3i nun.: 7 mm., with the 

 front margiuate and produced in a small median point. The eyes 

 are large, composite, and posteriorly situated. The first pair of 

 antenna? have the first article elongate, about twice as long as 

 wide; the second article is small and less than half the length of the 

 first; the third is narrow, about one-fourth the width of the first 

 article, and elongate, being about two and a half times as long as wide. 

 The llagellum is composed of about sixteen articles and does not extend 

 to the post-lateral angle of the first thoracic segment, but to the pos- 

 terior margin of that segment. The second pair of antcnucV, with a 

 flagellum of nineteen articles, extend to the post-lateral angle of the 

 first thoracic segment. 



The segments of the thorax are subequal, with the exception of the 

 first, which is about twice as long as those following. The post-lateral 

 angles of the first segment extend backward. The epimera of the six 

 following segments are not distinct from the segments, but faint lines 

 indicate the place of union. Tlie lateral parts of these segments are 

 drawn out in narrow triangular processes. 



The abdomen is composed of two segments, the first of which has 

 three suture lines on either side indicating partly coalesced segments. 



