10 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



The first segment of the alxlonien has two suture lines on either 

 side, indicatino- other coalesced segments. The terminal segment has a 

 xery deep median notch, the lateral angles l)eing rather acute. Within 

 the cmargination, and completely filling it, is a large triangular median 

 tooth, broad at the base and ending in a very sharp spine. Thi.s median 

 tooth extends considei'al^ly bej'ond the lateral angles. 

 At the base of the segment is a series of four tubercles 

 situated in a transverse line. Below thi.s row and out- 

 side of it are two prominent tubercles, one on either 

 side. Below this transverse row of two tubercles is 

 another row of two tubercles, one on either side of 

 Fig. 13.— cymodoci; the median line, and situated closer together than the 

 MERiDioNALis. ^^yy preceding tubercles. At the base of the median 



Abdomenand , .,.', ., ,. 



LAST THORACIC tootfi withiu the terminal notch is a small median 

 SEGMENT OF MALE, tubcrclc. Both brauchcs of the uropoda extend be- 



X 4~. 



yontl the abdomen. The inner branch is twice as long 

 as wide, with sides nearly parallel and posteriorly obliquely truncate, 

 with a spine at the outer and inner post-lateral angles. The outer 

 branch is leafed-shaped and longer than the inner branch, and termi- 

 nates in a spine. There is also another spine on the outer margin 

 near the extremity. 



The type and only specimen, a male, comes from off Cape St. Roque, 

 Brazil. It was taken by the U. S. Bureau of Fisheries steamer Alha- 

 tross at a depth of 20 fathoms, among ))roken shells, and is in the U. S. 

 National Museum, Cat. No. 32245. 



CYMODOCE BRASILIENSIS, new species. 



Body ovate, more or less contractile, 4 mm. : 8 mm. 



Head wider than long, w4th the front produced in a small median 

 point. Eyes small, composite, and situated in the post-lateral angles. 

 The first pair of antennae have the first article oblong, al)out twice as 

 long as wide; the second article is short and small and is one-third as 

 long as the first article; the third article is narrow and elongate and 

 about twice as long as the second article. The flagellum is composed 

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

 thoracic segment. The second pair of antenna, with a fiagellum of 

 eighteen articles, extends to the posterior margin of the fourth thoracic 

 segment. 



The first segment of the thorax is longer than any of those follow- 

 ing. The epimera are not distinctly separated on any of the segments. 

 The post-lateral angles of the first segments arc produced backward. 

 The lateral parts of the following segments are posteriorly produced 

 in narrow processes. 



The abdomen is wider than the thorax, but this increase in width 

 is not apparent in a dorsal view. Tlie first segment has suture lines 

 indicating other partly coalesced segments. It is produced at either 



