220 130PYRID.E. 



of the prawn to which it has been affixed ; hence, in our 

 right-hand figure, representing the dorsal view of the 

 female, the head is seen to the left of a straight line, the 

 lateral margins of the body to the right being distended, 

 whilst those of the opposite side are contracted in a 

 corresponding degree; the head itself does not project 

 beyond the general outline of the body, which is almost 

 continuous, and its anterior edge is rather sharp ; the 

 hind part is considerably contracted, and very deeply 

 immersed in the anterior segment of the body ; the eyes 

 are wanting in this sex. The antennas are very small, 

 the outer pair being composed of three short, broad 

 joints, gradually diminishing in size, the last terminating 

 in a minute point, which may possibly represent the 

 flagellum ; the inner pair appear to be only formed of 

 two distinct joints, of which the basal one is nearly 

 circular. 



The rudimental mouth is covered by a large pair of 

 foot-jaws (maxillae), flattened, with the inner margin 

 (where the two meet together) nearly straight, the inner 

 apical angle being provided with a small, nearly circular, 

 lobe or joint, clothed with small hairs, and the base of 

 this pair of foot-jaws is furnished with two or three 

 membranous, flattened, pointed ajDpendages. The an- 

 terior pair of the scales forming the incubatoi'y pouch 

 are transverse, and furnished with a large, flattened, 

 curved lobe, of which the extremity is obtuse and in- 

 curved. The other scales are affixed within the base of 

 the legs, the hinder extremity of each overlapping the 

 succeeding scale. 



The seven pairs of legs are of equal size and similar 

 in form, being short and thick, having a broad, oval 

 hand, terminated by a small finger. They are generally 

 folded back and concealed beneath the lateral margins of 



