4 
CATALOGUE OE ECHINIDA. 
straight grooves on the lower side, continued to the mouth ; 
vent small, infra-marginal ; mouth pentagonal, deeply sunk 
in ; jaws very strong, with two high wings ; teeth vertical ; 
cavity of the shell with many vertical septa ; genital pores 
five, at top of ambulacra, and not continuous with the madre- 
poriform plate. 
Clypeaster, §*, LamJc. Syst. 349, 1801. 
Clypeastsr, Lamb. Hist . ed. 2, iii. ; Desmoulin , Etudes , ii. 212 ; 
Agassiz dc Desor, Ann. Sci. Nat. 1847, 129. 
Clypeasteroidea /3 Clypeastritae, Agassiz; Broun, Gesch. d. Nat. 
195. 
Echinanthus, sp. Leske ; Breynus. 
Echinanthus, Gray , Ann. Phil. 1825, 5. 
Echinorodum, Van Phelsum , 38. 
Scutum angulare, Klein. 
* Vent in margin; margin very thick , rounded; base concave .• 
t Back convex. 
1. Echinanthus rosaceus. 
Ambulacral petal very broad and strongly rounded; back 
regularly rounded ; anus in the margin ; jaws higher than 
broad, ambulacra close at the end. 
Echinus rosaceus, Linn. & JV., 3186. 
Erizo estrellado, Parva Descrip. 139, t. 52, f. 1-10. 
Scutum angulare humile, a, Klein Gall. 84, t. 9, f. 13. 
Echinanthus humilis, Leske ap. Klein , 185, 1 . 17, f. a. 1 . 18, f. 13 ; 
Ency. Math. t. 145, f. 56 ; Seba, iii. t. 11, f. 2, 3, & 13, 14 ; 
Knorr Dele, d, 1, f. 12 ; Gray , Ann. Phil. 1825, 5. 
Echinorhodum, Van Phelsum , 38, 44. 
Clypeaster rosaceus, Lamb. Hist. iii. ; Eth. t. 144, f. 78, t. 145, 
f. 1, 2, 5, 6 ; Deslong , Ency. Meth. ii. 299 ; Blainv. D. S. N. 
ix. 448 ; lx. 197 ; Zooph. 216 ; Desmoul. Tab. Syn. 212 ; 
Agass. Prod. 187 ; Agassiz Desor, 1. c. 130. 
Clypeaster incurvatus, Desmoul. Tab. Syn. 212. {Ency. Meth * 
t. 145, f. 56.) 
Monstrosities, ambulacra four, and ambulacra six-rayed, Mus. 
Paris. 
Hab. West Indies. 
a. Adult. St. Vincent’s, W. Indies. Mr. Guilding’s Col- 
lection. 
b. Half grown, cut across, showing the column inside. St. 
Vincent’s, West Indies. Mr. Guilding’s Collection. 
c. d. Half grown, without spines. 
e,f. Adult and young, covered with spines. 
