CATALOGUE OF ECHINIDA. 
23 
M. testudinea, Agassiz , 1. c. t. 40, f. 7, 9. 
a. Without spine ; back very convex behind. 
b. Small ; back less convex. Brazils. 
Var. 2. Anterior sides rather short ; ambulacra elongate, 
ovate. 
c. Small, without spines. 
d. Without spines. 
e. Without spines. Dr. Goodall’s Collection. 
/. Without spines ; showing the dorsal part of the jaws. 
g , h. Without spines. 
i,j. One covered with spines. 
** p ores s ix ; anterior slit distinct. 
2. Mellita hexapora. 
Small dorsal spines with round head at the top ; the band 
of larger spine and tubercle between the inferior veins narrow, 
linear ; grooves much branched, and very sinuous. 
Echinotrochus perforatus, Van Phelsum , 33. 
Echinodiscus sexies perforatus, Leslce ap. Klein , 199, t. 50, f. 3, 4. 
Echionanthus, Seba, Thes. iii. t. 15, f. 7, 8. 
Oursin de mer-etoile, Klein , Gall. Supp. 230, 231, t. 24, f. 
a, b , 1 , 2. 
Pain d’epice, &c., Barilla , Cat. n. 955, f. 423. 
Echinus hexaporus, Gmelin , S. N. 3189 ; Favanne , t. 58, f. c. 2. 
Scutella hexapora, Blainv. B. J$. N. lx. 200 ; Zooph. 200 ; 
Agassiz , Prod. Ech. 188. 
Scutella sex foris, Lamk. Hist. iii. 279 ; Beslong , E. M. ii. 676 ; 
Ency. Meth. t. 149, f. 1, 2 ; Besmoul. Tab. iSyn. 224. 
Mellita hexapora, Agassiz & Besor , 1. c. 138 ; Agassiz, Mon. 
Scutelles, ii. 41, t. 4, f. 4-7, t. 44, 146, f. 11, 12 ; Muller, 
Belie, i. 93, t. d. 1, f. 17 ; Ency. Meth. t. 59, f. 6 ; Knorr, 
Belie, t. d. 1, f. 17. 
Hab. Martinique, Mexico. 
c, d, e.f , g. West Indies. 
h, i,j, k, l, m. St. Vincent’s. Mr. Guilding’s Collection. 
n,o, p, q, r. St. Vincent’s. Mr. Guilding’s Collection. 
Var. 1. Body elongate, Agassiz & Besor, 1. c. 138. 
Mellita similis, Agassiz, Mon. Scutelles , 43, t. 4, f. 1-3, 146. 
a, b. West Indies. 
Hab. Porto Rico. Mus. Mechelin. 
Var. 2. Irregular ; the hinder lateral slit confluent with the 
edge, forming notches. 
Mellita lobata, Agassiz, Mon. Scutelles , 44, 146, t. 4, a, f. 13, 
t. 16, f. 4-7. 
s. Back edge irregularly sinuous. 
t. Back broken, the hinder lateral sinuous. 
