HERMAPHRODITE. 265 



(Herm.) Capitulam with 13 valves : three pair of latera ; 

 upper latera much elongated : peduncle without calcareous 

 scales. 



Mandibles with 10 or 11 unequal teeth : maxillae witli 

 the edge nearly straight, bearing numerous spines. 



Complemental Male, attached externally, between the 

 scuta and below the adductor muscle; pedunculated; ca- 

 pitulum formed of six valves, with the carina descending 

 far beneath the basal angle of the terga ; mouth and cirri 

 prehensile. 



Swan River, Australia, attached to a coralline ; Mus. Cuming. Port 

 "Western, Bass's Straits, as stated in the Voyage of the Astrolabe. Mus. Brit. 



HERMAPHRODITE. 



Capitulam formed of 13 valves; namely, two scuta, 

 two terga, a carina and sub-carina, a rostrum, a pair of 

 upper latera, and two pair of lower latera ; these latter 

 valves, with the sub-carina and the rostrum, make a 

 whorl of six pieces. The upper part of the capitulum is, 

 as usual, produced. The upper valves are separated (in 

 specimens which have not been dried) by rather wide 

 interspaces of membrane; they are covered (excepting, 

 generally, their umbones,) by membrane, which in the 

 interspaces is clothed with fine spines. The spines, or 

 the marks where they were once articulated, are visible 

 over nearly the entire surface of the membrane covering 

 the valves. The spines are particularly numerous round 

 the orifice of the sack. The whole capitulum, (in a dried 

 condition), is coloured dull purplish-red, which is only in 

 part due to the underlying corium, for the valves them- 

 selves are pale red. After having been long kept in spirits, 

 the whole capitulum becomes colourless. The valves are 

 smooth, faintly marked by lines of growth. The umbones 

 of the lower valves project outwards, giving a denticu- 

 lated appearance to the base of the capitulum. 



Scuta, slightly convex, oblong, breadth about two 

 thirds of the length, almost quadrilateral, with the 



