CATALOGUE OP ECSIXILA. 
17 
* Hinder edge divided into simple rays. 
Scutella, § f., Blainv. D. S. N. lx. 201. 
1. Rotula Rumphii. 
Hinder edge divided into many simple rays ; digitation short 
and broad. 
Rotula Rumphii, Klein , N. D. Echin. ed. Leske , 26, t. 22, f. e. f. ; 
Agassiz A' Desor , 1. c. 138. 
Placenta Rotula, sp. 2, Klein , Gall. § 91, 196, t. 12, f. c. 
Echinodiscus dimidia perifera, &c., Breyn, Dissert. Polyth . 64, 
t. 7, f. 3-4. • 
Echinotrochus decern dentatus, Van Phelsum , 32. 
Rotula, DaviUa , Cat. 425. 
Echinus Solaris, Rumph. 37, note, t. 14, f. 1. 
Echinus orbiculus, a & / 3, Gmelin S. N. f. 3192. 
Oursin dente, Bose. DeterviU. Diet. H. N. xxiv. 281. 
Oursin solaire (Rotula), DaviUa , Cat. i. 424, n. 959. 
Oursin disque, D'Argenv. Zoomorph. t. 7, f. d. 
Echinus planias singularis, JSeba, Thes. iii. 35, t. 15, f. 15, 16. 
Tertia Echinodisci, sp., Seba, Thes. iii. 35, t. 15, f. 19, 20. 
Echinodiscus dentatus, Leske , 212, t. 22, f. e. f. ; Gray , Ann. 
Phil. 1825, 6 ; var. minor, Leske , 212, t. 49, f. 6, 7. 
Scutella dentata, Blainv. Diet. Sci. Nat. xlviii. 226, lx. 201 ; 
Zooph. 201 ; Agassiz , Prod. Ech. 188 ; E. Deslong. Ency. 
Meth. ii. 675 ; Ency. Meth. t. 151, f. 1-4 ; Lamk. Hist. iii. 
277 ; Desmoid. Tab. Syn. 220, n. 1. 
Les Scutelles semisoleils, Blainv. D. JS. N. xlviii. 226 ; lx. 201. 
Scutella semisol, Desmoid. Tab. Syn. 220. 
Scutella radiata, De Blainv. D. iS. N. lx. 201 ; Zooph. 201 ; Seba, 
iii. t. 15, f. 3, 9, 20 ; Agassiz, Prod. Echin. 188 ; Lamk. Hist. 
iii. 278. 
Boccon, Observ. 273. Favan. Zooph. t. 74, f. 6. Gualt. Test. 
t. 110, f. 11. Valent. Mus. iii. 177, f. 2. 
Var. 1. Digitations narrow, elongate. 
Rotula digitata, Agassiz A Desor , 1. c. 138. 
Rotula Rumphii, Agassiz , Monog. Scutelle, 25, t. 1. 
Hab. Senegal. 
** Body with five slits, the edge of the hinder portion lobed. 
Scutella, e., Blainv. D. S. N. lx. 201. 
2. Rotula augusti. 
The anterior part of the body depressed, with two elongated 
slits ; vent intermediate, between the mouth and the bottom of 
the posterior slit. 
Rotula augusti, Klein, edit. Leske, 26, § 90, t. 22, f. a. b. c. d. ; 
