68 NOTES ON TASMANIAN CRUSTACEA, ETC. 



and capable of folding against the setose inner margin of the 

 second joint. 



First maxillae (fig. 6) with outer plate long and narrow, 

 very slender, and ending in one strong tooth, and three 

 smaller ones ; inner plate rudimentary with a minute ter- 

 minal seta. Second maxillae (fig. 7) somewhat dilated, end- 

 ing in a feeble rounded lobe, and bearing on its inner ex- 

 tremity a \ery small uni-articulated process. 



Maxillipeds (fig. 8) pediform, the terminal portion ending ia 

 a few (about four) small claws; the palp represented by a 

 very small one-jointed process 



The three anterior pairs of thoracic feet are furnished with 

 sickle-shaped dactyli. The four posterior pairs are directed 

 backwards and are elongated ; the sixth and seventh pairs 

 are the longest. 



The basal part of the caudal appendages is produced back- 

 wards on its inner side into a long acute ciliated process ; the 

 external ramus is long, narrow, pointed and ciliated all round, 

 it bears a row of spines on its outer margin ; the internal 

 ramus is about twice as broad ; and is obliquely truncate at 

 its widest part ; it is ciliated all round, and bears a row of 

 spines towards the extremity of both margins. 



Length of the animal 15mm. (^ about | inch.) 



Fam. Sjjhceromidce. 



12. SpJiceroma gigas. Leach. 



A small specimen, which I provisionally refer to this widely- 

 spread Antarctic species, was picked up by me on the rocks be- 

 tween tide-marks at Pirates Bay, and a second from the same 

 locality, collected by Mr. E. M. Laing, was handed to me by Mr. 

 Chilton. It is identical with a species common on the East 

 Coast of New Zealand, but, with them, differs in a few details 

 from a large form, of which I have specimens from the Auck- 

 land Islands. In no group of Isopoda is there more need of a 

 thorough revision of the genera and species than in the Spha&ro- 

 midae ; and identification of many of the described forms is now 

 a matter of extraordinary difficulty. This is chiefly owing to 

 the fact that various naturalists have taken sexual characters 

 2^ of generic importance, and have, consequently, in many cases 

 placed males and females of the same species in genera. This 

 species has not previously been described from Tasmania. 



13. Sphceroma quoyana. M.-Edw. 



I obtained a solitary specimen of this well-marked species 

 between tide-marks on the Huon Eiver, a little below Franklin. 

 The species was originally described by Milne-Edwards, from 

 specimens gathered on the coast of Tasmania by M. M. Quoy 



