CRYPTOT1IIRIA PYGMJEA. 



ISOPODA. 



NORMAL1A. 



261 

 EOPYRIDJR. 



CRYPTOTH1RIA PYGJNLEA.* 



Specific character. Supposed Male. -- Elongate-ovate, posteriorly at- 

 tenuated, convex above, concave beneath. Cephalon rather longer than the 

 following segment. Anterior pair of pereiopoda strongest ; posterior pair of 

 pereiopoda long and slender. Sixth or terminal segment of the tail forming 

 a minute plate, covering the base of the hind pleopoda. 



Female with the body divided into two portions, the anterior composed of 

 the head and three following segments, connected by means of a constriction 



' The woodcut at the head of this article represents the male of C. 

 pyymcea, and the extremity of its body highly magnified, from specimens 

 furnished by the Rev. A. M. Norman. The female C. pyymcea, (copied 

 from LiUjeborg) is the upper left-hand figure ; Rathke's figure of the young 

 C. pyymcea (which, if the form of the antennae be correct, is undoubtedly a 

 male of mature form) is copied in the upper right-hand figure ; whilst the 

 lower right-hand figure is copied from Lilljeborg's figure representing the side 

 view of the young of L. pygmcea. 



