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CARL BOVALLIUS, THE OXYCEPHALIDS. 



The first Oxycephalidean species described, which belongs to 

 this new genus, is Oxgcephalus scleroticus, TH. STREETS, from the year 

 1878, the second is 0. typhoides, described by GLAUS in 1879, and the 

 last is the new species recorded below under the name Stebbingella 

 Theeli. 



A. The lower hind corner of the pleoual segments is pro- 

 duced backwards, and sharp-pointed. 



a 1. The last ural segment is as long as the telson. The 

 rostrum is longer than the rest of the head (tf). 

 The seventh pair of peneopoda are shorter than 

 the femur of the sixth pair. 



a 2. The last ural segment is more than twice as long 

 as the telson. The rostrum is much shorter than 

 the rest of the head (<$). The seventh pair of perseo- 

 poda are much longer than the femur of the 

 sixth pair. 



1. S. sclerotica. 



2. S, typhoides. 



The lower hind corner of the pleonal segments is squar- 

 ed, not produced, nor sharp-pointed. The last ural seg- 

 ment is about a fourth part longer than the telson. 

 The rostrum is nearly as long as the rest of the head (cJ). 

 The seventh pair of peraeopoda are longer than the 

 femur of the sixth pair. 



3. S. Theeli. 



1. Stebbingella sclerotica, TH. STREETS, 1878. 



PI. IV, fig. 13-16. 



Diagn. The body is dorsally carinated, with a broad, rounded ridge, 

 and a row of nodules along the sides above the epimerals. 

 The fifth epimeral has a prominent spine directed backwards; 

 the whole surface of the body is finely granulated. 



The head is as long as the first five personal segments to- 

 gether; the rostrum is considerably longer than the rest of 

 the head, and is wedge-shaped. 



The first four joints of the second pair of antennce are 

 subequal in length and straight; they reach, when folded, 

 nearly to the the apex of the rostrum. 



