12 
CATALOGUE OF ECHINIDA, 
9. Laganus DECAGONUM. 
Body orbicular, slightly ten sided ; edge very thin ; ovarial 
pores 5 ; oral grooves keeled near the mouth ; vent posterior. 
Lagana decagona, Lesson, Voy. Uran. fide Blainv. D. S. W. 
lx. 196. 
Laganum decagonum, Agassiz, Mon. Scutelle, ii. 112, 150, t. 23, 
f. 16-20 ; Agassiz 8$ Desor, 1. c. 132. 
Scutella decagonalis, Blainv. D. S, N. xlviii. 229 ; Desmoul, 
Tab. Syn. 230. 
Hab. Isle Waigron. 
10. Laganum ellipticum. 
Body ovate, depressed ; edge turned ; vent transverse ; some 
pores on back. 
Laganum ellipticum, Agassiz, Monog, Echin. ii. Ill, t. 23, f. 
13-15, 149 ; Agassiz § Desor, 1. c. 132. 
Hab. Mus, Stokes. 
11. Laganum Bonani. 
Body sub-pentangular, depressed ; edge inflated ; madrepori- 
form tubercles with a small groove in the centre of the ovarial 
pores. 
Laganum Bonani, Klein <$, LesTce, 25, t. 22, f. a. b. ; Agassiz, 
Mon. Scutelle, 108, t. 23, f. 8-12, t. 22, f. 25-29, 150 ; Agassiz &; 
Desor, 1. c. 132. 
Laganum minus Bonani, Klein, 25, t. 22, f. c. 
Lagana minor, Gray, Ann. Phil. 1825-6. 
Clypeaster Laganum, Lamk. Hist. iii. 291 ; Delong. E. M. ii. 199. 
Scutella laganum, Blainv. D. S. N. xlviii. 228 ; Desmoul. Tab. 
Syn. 230. 
Lagana laganum, Blainv. D. S. N. lx. 196. 
Echinodiscus laganum, Leske ay. Klein, 214, t. 22, f. c. 
Echinus laganum, Gmelin S. AT. 3190. 
Echinus planus, Rumyh. 36-37, t. 14, f. e. 
Echinodiscus, Gualt. Test. t. 110, f. e. 
Echinus planus, Seba Thes. t. 15, f. 25-26. 
Hab. Hew Guinea. Quoy. 
a, b, c, d, e. Without spines. Presented by .J, E. Gray. 
d. Without spines. 
e, f, g. Without spines. 
h, i, j, k, l, m, n. Without spines, pale yellowish brown, 
spotted. Siquigor. Mr. Cuming’s Collection. 
