CATALOGUE OF ECHINIDA. 
53 
Probably only a variety of the preceding, as one of our spe- 
cimens of it is high and keeled behind. 
3. Brissus carinatus. 
The hinder odd interambulacral area keeled, and obliquely 
truncated at its hinder edge ; subanal disk rather small. 
Echinospatangus, Gualt. Ind. t. 108, f. g. g. ; Seba, Mus. iii. 1. 14, 
f. 3, 4. 
Spatangus brissus, late carinatus, Leske ap. Klein , 249, t. 48, 
f. 4, 5. 
Spatangus carinatus, Lamk. Hist. iii. 325; E. M. t. 148, f. 11, 
t. 159, f. 1 ; f rom Seba; Deslong. E. M. ii. 685 ; Blainv. Zooph. 
203 ; Resso , Eur. Merid. v. 279 ; Desmoul. Echin. 380. 
Brissus carinatus, Gray, Ann. Phil. 1825, 9 ; Agassiz , , Prod. 184 ; 
Agassiz <k Desor , 1. c. 13. 
Oursin spatangus, Bose. D. II. K. xxiv. 282, t. 9, 25, f. 6. 
Hab. Isle of France. 
a, b. Without spines (one broken). Mauritius. Presented 
by Lady Frances Cole. 
c, d. Without spines; ? 
V ar. Subanal disk rather larger ; hinder end more erect. 
e. Without spines ; — — -? 
4. Brissus compressus. 
Spatangus compressus, Lamk. Hist. iii. 326; Deslong. E. M. ii. 
687 ; Desmoul. Echin. 388. 
Brissus compressus. Agassiz , Prod. 326 ; Agassiz <0 Desor , 1. c. 
13. 
Hab. Isle of France, Matthieu. 
Variety of the preceding? 
5. Brissus areolatus. 
Oblong edges of the coronal plates smooth; the anterior 
lateral ambulacra often sensibly bent in front ; subanal disk 
large, broad. 
Brissus areolatus, Valenc. in Agassiz & Desor , 1. c. 13. 
B. sternalis, var. ? Agassiz , 1. c. 13. 
Hab. South Seas, Peron. 
a. Without spines. Raines Islet. Presented by J. B. 
Jukes, Esq. 
b , c. With spines. Reefs of Attagor. Presented by J. B. 
Jukes, Esq. 
d , e,f. With spines, young. Reefs of Oamaga. Presented 
by J. B. Jukes, Esq. 
f 2 
