264 SCALPELLUM PERONII, 



as in the hermaphrodite. The outer maxilla? are bilobed 

 in front, with a few short bristles on the outer side near 

 the bottom. I was not able, from the dried state of the 

 specimens, to discover whether the olfactory orifices were 

 tubular. Altogether it was apparent, from this imperfect 

 examination, that there was a close similarity between 

 the mouth of the parasite and of the hermaphrodite. 



The Thorax is unusually elongated. 



Cirri. — The first pair is very short, and is distant 

 from the second. All have the appearance of immaturity, 

 with their pedicels very long in proportion to their rami ; 

 the latter are slightly unequal in length, even in the 

 sixth pair. There appeared to be six segments in the rami 

 of the sixth pair, each segment bearing two or three pair 

 of long spines. 



Caudal Appendages, with two or three little spines on 

 their summits. 



Penis, short, blunt, thick at the apex, with one or two 

 spines on it. I did not see any ovaria, but this could 

 hardly have been expected in specimens in a dried con- 

 dition, without they had happened to have been in a 

 gorged condition. Certainly there were no ova. 



In the general summary at the end of the genus, I 

 shall give my reasons for believing this parasite to be the 

 Complemental Male of the Scalpellum rostratum. 



5. Scalpellum Peronii. PI. VI, fig. 6. 



Smilium Peronii. /. K Gray. Annals of Philosoph., new series, 



torn, x, 1825. 

 — — SpicilegiaZoologica,tab.iii,fig.lO, 



1830. 

 Anatiea obliqua. Quoy et Gaimard. Voyage de P Astrolabe, 



PL xciii, fig. 16, 1823—1834. 

 Pollicipes obliqtja. Lamarck. Au. sans Vertebres (2d edition). 



8. (Herm.) valvis 13 : later um paribus tribus; pari sape- 

 riore multum elongato : pedunculi squamis calcareis nullis. 



