NO. 1479. NEW ISOPOD CRUSTACEANS'— RICHARDSON. 9 



The' first segment has suture lines andicating other partly coalesced 



se, nents. On the posterior margin are two prominent tubercles, one 



either side of the median line, directed backward as two points. 



le second or terminal segment terminates in three teeth, the median 

 tooth completely tilling the notch, of which the other teeth form the 

 outer angles. The median tooth is not longer than the lateral teeth 

 and is acute at the apex. At the base of the segment are two small 

 tubercles in a transverse series just below the large tubercles of the 

 preceding segment and situated a little outside of them. There are 

 two other small tul)ercles just below this series in an- 

 other transverse row and situated a little within the 

 two upper tubercles. A transverse row of four large 

 tubercles is phiced ])elow this second series. Just 

 above the median tootli of the posterior margin and 

 below the last series of four tubercles is a small median 

 tubercle. fig. 12.— cymodoce 



The inner immovable branch of the uropods reaches australis. ab- 



^ . |- . DOMEN AND LAST 



but little beyond the lateral teeth of the posterior thoracic seg- 

 margin of the terminal abdominal segment. It is ^^J'^^ °'' '"^''^• 

 posteriorly transversely truncate and has the sides par- 

 allel. The outer branch is nearly twice as long as the inner branch, 

 is pointed at the extremity, and is leaf-shaped. 



The entire surface of the abdomen is thickly tuberculate. The 

 posterior margin of the terminal segment and the ])ranches of the 

 uropods are beset with hairs. 



The specimen described is a male and is the type and only specimen. 

 It was taken by the V. S. Bureau of Fisheries steamer Alhatnm off 

 Cape St. Roque, Brazil, at a depth of 20 fathoms, among broken shells, 

 and is preserved in the U. 8. National Museum, Cat. No. 3224-1:. 



CYMODOCE MERIDIONALIS, new species. 



Body with the sides almost parallel, -ii mm. : 10 mm. 



Head wider than long, and produced in a small median point. Eyes 

 large, composite, and situated in the post-lateral angles. The first 

 pair of antenna^ have the first article oblong, nearly twice as long as 

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

 the first; the third article is as long as the second, but narrower, and 

 is twice as long as wide. The flagellum is composed of seventeen 

 articles, and extends to the post-lateral angle of the first thoracic seg- 

 ment. The second pair of antennae, with a flagellum of twenty-two 

 articles, extends to the post-lateral angle of the thiixl thoracic seg- 

 ment. 



The first segment of the thorax is longer than any of the others. 

 The epimera are not distinct from the segments. They are laterally 

 produced in narrow processes. The first segment has the post-lateral 

 angles also produced. 



