46 
CATALOGUE OP ECHINIDA. 
cioles distinct ; subanal disk subtrigonal, distinct from the 
vent ; ocellar pores five, surrounding the four ovarial pores. 
Breynia, Agassiz 8$ Desor , Ann. Sci. Nat. viii. 1847, 12. 
Spatangus, sp., Lamk. Hist. iii. ; Leach , Zool. Misc. 
1. Breynia Australasia. 
Spatangus Australasias, Leach , Zool. Misc. ii. 68, t. 82, 1815. 
Spatangus Crux Andreas, Lamk. Hist. iii. 326, 1816 ; Deslong. 
E. M. ii. 687 ; Deslong. Echin. 378. 
Brissus Crux Andreas, Agassiz , Prod. 184. 
Breynia Crux Andreae, Agassiz & Desor, Ann. Sci. Nat. viii. 
12, 1847, vi. t. 16, f. 14. 
Hab. Australia. 
a. Without spines. Australia, Port Jackson ? The spe- 
cimen figured by Dr. Leach. 
2. Breynia Desorii. 
Sunken tubercles on the lateral and posterior interambu- 
lacral area numerous, about 30 ; central fasciole elongate, nar- 
row, extended backward considerably behind the hinder line 
of the lateral ambulacra. 
Breynia Desorii, Gray, Ann. & Mag. N. H. 1851. 
Hab. Swan River. 
a. Without spines. W. Australia. 
b. Without spines. W. Australia. 
c. d, e,f,g , h. Without spines. W. Australia. 
i. Without spines. 
The specimens of this species in the British Museum all 
differ from the true Spatangus Australasia , Leach, Zool. Mus. 
ii. 68, t. 82 ; the B. Crux Andrce of Agassiz, well figured 
Ann. Sci. Nat. 1846, t. 16, f. 14, which is also in the British 
Museum, — in the dorsal tubercles being much more numerous. 
4. Spatangus. 
Shell thin, swollen ; ambulacra broad, the upper edge of the 
lateral ambulacra obliterated near the summit, the odd ante- 
rior one in a broad deep groove; interambulacral area with 
scattered large, perforated, and crenulated tubercles; peri- 
petalous fasciole none ; subanal fasciole deeply notched above 
the vent ; ovarial pores four, the two front closed ; ocellar pores 
five, in a pentagon round the ovarial pores ; upper lip of mouth 
composed of many small polygonal plates; a large vertical 
plate on the inner face of the shell on the left side of the 
mouth. 
