38 



Carl Bovallius, The Oxycephalids. 



scelidœ^ and the Eiityphidœ^ but is also a feature of the Isopoda. In the 

 Oxy cephalidae the telson is more or less broad, varying from the 

 broadest form in vSimorhynchotus (fig. 76) and Tu lib erg el la (fig. 74) 

 to the narrowly elongated form in Leptocotis and Dorycephalus (fig. 



iJ^ \1)IF 



Fiy. 71. Glossocephahts Milne Edwardsi. 



Vii/. 73 Cronocephahis Goësi. 



73). It is usually sharp-pointed at the apex, but in Cranocephalus 

 and Glossocephalus the apex is broadly rounded (fig 71 and 72). 

 In the Xiphocephalidœ on the other hand the telson is free from, 



Fig. 73. Doryceplmlus Lindstroemi. 



Fig. 74. Tullhergella cuspidata. 



and articulating with, the last ural segment; but the new species X. bre- 

 vicaudatus, described in 1888 by Stebbing (I. c. p. 1612) shows a very 

 remarkable exception to this rule. The case he reports of the telson 

 being coalesced with the last ural segment may possibly be an indi- 



