Mr. J. E. Gray on new genera and species of Spatangidae. 133 



Desoria Australis. Ovate, purplish white. 

 Var. 1 . Brown, each of the tesserae with a broad pale edge. 

 Uab. Australia, Flinders^ Island, Joseph Millingen, Esq. 

 Several specimens. 



Schizaster ventricosus. Very like S. canaliferus, but the hinder 

 part of the body is very high, the hinder end nearly vertical, 

 ventricose, and regularly rounded above the vent, the hinder part 

 of the peripetalous fascicle straight between the two lateral am- 

 bulacra. 



Hab, Australia ? ? 



Schizaster Jukesii. Like former, but vertex nearly central ; 

 crown strongly keeled between the two hinder ambulacra; the 

 part of the peripetalous fasciole between the anterior and poste- 

 rior ambulacra regularly bent up nearly to the vertex, the hinder 

 end vertical, regularly rounded above the vent. 



Hab. North Austraha, J. B. Jukes, Esq. 



Kleinia. Shell ovate, elongate, ventricose, subcordate, ver- 

 tex subcentral ; centre of back with rather larger perforated tu- 

 bercles ; lateral ambulacra sunken, ovate, linear, confluent near 

 the vertex, where the inner series of twin pores are nearly obli- 

 terated, the anterior pair diverging, the hinder pair nearly par- 

 allel, diverging at the end, the anterior odd one in a rather 

 deep groove with only rudimentary pores ; all surrounded by a 

 broad, rather sinuous peripetalous fasciole; subanal fasciole sur- 

 rounding the oblong subanal plate, which is covered with radiating 

 series of tubercles, and transversely divided in half by a subcen- 

 tral fasciole ; ovarial pores four, hinder largest ; mouth anterior, 

 vent in the upper part of the high hinder extremity covered with 

 small irregular plates ; spines of the crown elongate subulate, of 

 the plastron and subanal plate longer, stronger, rather dilated 

 at the end. 



This genus differs from Brissus in the peculiar form of the 

 ambulacra, and in the larger size of the dorsal spines and tuber- 

 cles, and from Plaffionotus in the form of the subanal plate and 

 ambulacra. 



Kleinia Luzonica. Shell ovate, ventricose; ambulacra con- 

 fluent near the vertex, inner series of pores nearly obliterated ; 

 lateral ambulacra ovate, petaloid, the hinder pair shorter, nearly 

 parallel, anterior pair divergent; vent in the upper part of the 

 high hinder extremity. 



Hab. Philippines, Isle of Luzon. 



Agassizia subrotunda. Ovate, subglobose, regular, even, with- 

 out aay tubercles on the side or round the vent, the odd ante- 

 rior groove with two lines of minute tubercles. 



Hab. Australia, Capt. Sir Edward Belcher. 



