CinTTOTlllRlA PYGM.EA. 



ISOPODA. 

 NORM A LI A. 



261 



BOPYRIDJI. 



CRYPTOTHIRIA PYGM.EA.* 



Specific cJiaracter. — 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 bind 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, 

 pi/f/mcea, and the extremity of its body highly magnified, from specimens 

 furnished by the Rev. A. M. Norman. The female C. py^jwfea (copied 

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

 C. fyrjmcea (which, if the form of the antennse 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. pygnuea. 



