Mr. J. E. Gray on new genera and species of Spatangidse. 131 



Lovenia elongata. Spatangus elongatus, Gray, in Eyre's Discov. 

 Central Australia, i. 436. t. 6. f. 2. Ovate, rather elongate, de- 

 pressed ; back with many sunken tubercles on the sides. 



Hob. Port Essington, Mr. Jukes. 



Lovenia subcarinata. Shell elongate, narrow, the lower an- 

 terior edge keeled, the lower part of the upper side with six or 

 eight large tubercles placed in two series on each side at the end 

 of the anterior lateral ambulacra. 



Hah.- Philippines, Isle of Luzon, H. Cuming, Esq. 



EcHiNOCARDiuM. This genus may be divided into the fol- 

 lowing sections : 



* Anterior odd ambulacral groove deep, hinder end perpendicular, 

 lowei' part blunt. 



Echinocardium cordatum, &c. To this section also belong — 

 Echinocardiuin australe. Very like E. cordatum, but the hinder 



end is erect and the lower edge rather acute. 



Hab. Australia, Port Jackson, J. B. Jukes, Esq. ; Van Diemen's 



Land, Ronald Gunn, Esq., and Dr. A. Sinclair. 



Echinocardium zealandicum. Very like the former, but plas- 

 tron lanceolate elongate, and the body more ovate and elongate. 

 Hab. New Zealand, Dr. Andrew Sinclair : several specimens. 



** Anterior odd ambxdacral groove shallow, lower part of hinder 

 end produced, acute, E. gibbosum. 



Breynia Australasice. Spatangus Australasia, Leach, Zool. 

 Misc. ii. t. 82. 1825. S. Crux Andrece, Lamk. Hist. ; Agassiz, 

 Ann. Sci. Nat. vi. t. 16. f. 14. Large tubercles on sides of lateral 

 ambulacra few, internal fasciole short, broad. 



Hab. Port Jackson. 



Dr. Leach's specimen exactly agrees with ]M. Agassiz' figure. 



Breynia Desorii. Sunken tubercles on the lateral and poste- 

 rior interambulacral area numerous (about thirty), the internal 

 fasciole elongate, narrow. 



Hab. Swan River. 



Several specimens, all differing in the abo\'e characters from 

 the former. 



Meoma. Shell subcordate, vertex subcentral ; ambulacra 

 sunken, lateral paii's equal, odd anterior one entirely oblite- 

 rated, marked by a shallow groove, surrounded by a very sinu- 

 ous pei'ipetalous fasciole, without any lateral fasciole; subanal 

 fasciole incomplete, edging the under side of the indistinct sub- 

 anal disk, and only extending up to the level of the lower edge of 

 the vent and with the subanal pores in the fasciole. 



9* 



