V 

 Willemoesia Group of Crustacea. 279 



armed with five strong teeth, median with two, and posterior 

 with eight or nine strong teeth that are continuous to the pos- 

 terior margin; frontal margin having a single sharp tooth 

 on the inner side of the orbital angle, and two central rostral 

 teeth, posterior to which are two single and two double 

 teeth on the central dorsal ridge of the anterior portion of 

 the carapace ; two teeth closelj set are situated on the 

 anterior and posterior extremities of the central ridge. The 

 pleon is carinated, each somite being formed into two unequal 

 teeth, the anterior being the longer and most anteriorly pro- 

 jecting. 



Taken in lat. 47° 48' S., long. 74° 48' W., on the west 

 coast of Patagonia, 120 fathoms, in mud. 



PentacTieles gracilis^ n sp. 



Carapace long, ovate ; lateral margins evenly denticulated 

 from the anterior to the posterior extremities ; anterior division 

 armed with nine teeth, the median with three, and the posterior 

 with fifteen; the frontal margin has two rostriform teeth, and 

 one still more prominent at the inner canthus of each orbit. 

 The median longitudinal dorsal ridge armed through the entire 

 length with a siugle row of sharp teeth, of which the anterior 

 are the more prominent. Pleon carinated, but only the three 

 anterior somites are armed with sliarp cusjds. Anterior pair of 

 pereiopoda having several small spines on the inner margin 

 of the meros ; posterior pair unequally chelate. 



Taken in lat. 19° 10' S., long. 179° 10' E., off" the Fiji 

 Islands, at a depth of from 210 to 610 fathoms, on a bottom 

 of Glohigerina-ooT^Qj with a temperature of the sea-bottom of 



a°-7 c. 



Pentaclieles ohscurus, n. sp. 



Carapace with the lateral margins parallel and unevenly 

 denticulated ; frontal margin with two central rostriform teeth ; 

 divisions of the carapace not well-defined, anterior with three 

 or four small teeth separated from each other, median with 

 three similar teeth, and the posterior with five or six. Anterior 

 pair of pereiopoda with the meros short and smooth; posterior 

 pair unequally chelate. Pleon carinated, tuberculous in the 

 median line. 



Taken in lat. 2° 33' S., long. 144° 4' E., north of New 

 Guinea, at a depth of 1070 fathoms, at a temperature of 2°"1 C, 

 on a bottom of Globigertna- oozg. 



The only specimen of this species was in a very imperfect 



