NO. 1350. NATVRAL HISTORY OF THE ISOPODA— RICHARDSON. 



43 



either side of the median line. TJiese segfrnents are not separated from 

 tlio teriiiiiiiil sooincMit, Imt urc coulescod with it. The terminal seg- 

 ment is rounded posteriori}-. Bordering the lateral margins is a row 

 of seven or eight spines on either side of the median line. The dorsal 

 surface is irreguhirly covered with numerous long and short spines. 

 At the posterior extremity of the terminal segment are two very long 

 spines — the longest on the body — directed backward. Between them 

 and a little back of them are two smaller spines, also directed backward. 



The valves of the operculum are covered with numerous small 

 spines. 



Both the anterior and the posterior pairs of legs are armed with 

 many long and short spines. The anterior pairs are also fringed with 

 hairs. 



Three specimens of this species were collected by the U. S. Fish 

 Commission steamer Albaf/'oss at Rat Islands, the Aleutian Chain, at a 

 depth of 270 fathoms. 



Ti/pe.— Cat. No. 29082, U.S.N.M. 



EPICARIDEA or BOPYROIDEA. 



Family BOPYRID^. 



PARAPEN^^ON, new genus. 

 PARAPENiEON CONSOLIDATA, new species. 



Body somewhat oval, about one and a half times longer than broad. 

 Color uniformly yellow, without any markings. 



Head with frontal ])order produced in a large quadrangular process, 

 directed upward; poste- 

 rior portion triangulate 

 in shape. Eyes alxsent. 

 The lirst pair of antenna* 

 are composed of three 

 joints, the terminal joint 

 ))eing minute. The sec- 

 ond pail" of antenna' con- 

 sist of four joints. 



The lirst two segments 

 of the thorax have the 

 anterior portion of the 

 pleural plates ("lames 

 pleurales") very large 

 and conspicuous, and, although developed from the anterior part of 

 the segment, they extend some little distance in front of the seg- 

 ments. The posterior parts of these segments have each a small lobe 

 constricted off, which may be regard(>d as the posterior })ortion of the 



Fig. 17. — 1'ar.\pkn.k<>n con.soi.id.xta, nfw spec!E.s. «, 1)()K.s.\l 

 view (ii'' female t), ventkai. view (ik same. x .h. 



