CATALOGUE OE ECHINIDA. 
11 
ft Anus sub-medial , large, longitudinal ; shell thick , edge 
rounded. 
6. Laganum orbiculare. Boccon , Obs. 269, f. 2-3. 
Body sub-orbicular ; edge inflated ; vent posterior. 
Echinodiscus circinnatus, Breyn, Sched. 64, t. 7, f. 1-2 ; Gualt . 
t. 210, f. b. 
Laganum Sihynvoetii, Klein , 25. 
Echinus planus, Rumjph. 37. 
Echinus orbiculus, d, Linn. S. N. 1105. 
Echinus orbicularis, Gmelin , /SI iV r . 3191. 
Echinodiscus, Gmalt. t. 110, f. b. 
Laganum orbiculare, Agassiz , J/cm. Scutelle, 120, t. 22, f. 16-20, 
150; Agassiz Desor, 1. c. 132. 
Echinodiscus orbicularis, Leske ap. Klein , 208, t. 45, f. 6-7 ; Gray, 
Ann. Phil. 1825-6; Blainv. I). S. N. lx. 199; Zooph. 199. 
Scutella orbicularis, Lamk. Hist. n. 10 ; Deslong. E. M. ii. 677 ; 
Ency. Meth. 1. 147, f. 1-2 ; Blainv. D. S. N. xlvii. 228 ; Agassiz, 
Prod. 21 ; Desmoul. Tab. Syn. 232. 
Lagana orbicularis, Blainv. Zooph. 196. 
Var. Agassiz Besor, 1. c. 132. 
Laganum marginale, Agassiz, Monoq. Scutelle, ii. 121, 150, t. 22, 
f. 11-15. 
Hab. ? 
7. Laganinum latissimum. 
Yery large ; edge thin, not swollen. 
Scutella latissima, Lamk. Hist. iii. 12, Ed. 2, iii. 206 ; Deslong . 
E. M. ii. 678 ; Desmoul. Echin. 228. 
Echinodiscus latissimus, Blainv. D. S. N. lx. 199; Zooph. 218. 
Echinarachnius latissimus, Agassiz, Prod. 118. 
? Scutella integra, Brug. Ency. Meth. t. 146, f. 4-5 ; Blainv. 
D. S. N. lx. 201. 
Laganum latissimum, Agassiz £f Desor, 1. c. 13. 
Scutella truncata, Lamk. Expl. pi. Ency. Meth. t. 146, f. 4-5. 
Hab. Indian Ocean. Mus. Paris. 
De Blainv. refers to Ency , Meth. t. 146, f. 4-5, for Scutella 
integra ; but the figures represent the under-side with branched 
grooves, like an Encope. 
8. Laganum cingulatum. 
Small, circular or elliptical, flat ; edge thick, swollen ; ambu- 
lacral star very small. 
Laganum cingulatum, Agassiz & f Desor, 1. c. 132. 
Hab. Isle Salerno. 
