56 
CATALOGUE OF ECHINIDA. 
** Subanal fasciole imperfect. 
10. Meoma. 
Shell thin, heart-shaped ; vertex subcentral ; ambulacra sunk 
in a deep groove, the anterior and posterior lateral pairs nearly 
equal; odd anterior ambulacra entirely obliterated, only 
marked by a shallow anterior groove; surrounded by a very 
sinuous peripetalous fasciole, without any lateral fasciole ; the 
under side of the subanal disk edged beneath by a half sub- 
anal fasciole, only extending up to the level of the lower edge 
of the vent, and with the subanal pores in the fasciole. 
Meoma, Gray, Ann. & Mag. N. H. 1851. 
1. Meoma grandis, t. 5, f. 2. 
Shell heart-shaped, rather convex ; the anterior part of the 
peripetalous fasciole straight, with a distinct inflection towards 
the vertex, near the anterior edge of the anterior lateral ambu- 
lacra, and bent up between the lateral and anterior ambulacra. 
Meoma grandis, Gray, Ann. S Mag. N. 11. 1851. 
Hab. Australia. 
a. Without spines. Australia. Presented by Capt. Edward 
Belcher, K.C.B., R.N. 
b , c. With spines. Australia. 
*** Subanal fasciole none. 
11. Faorina. 
Shell ovate, subglobose, subcordal, ventricose ; vertex central, 
hinder end truncated, without any distinct subanal disk ; with 
a smooth band to the mouth, over the suture, between the 
anterior ambulacral area ; covered with small equal tubercles ; 
ambulacra sunk into a groove ; the lateral one regularly diverg- 
ing, the anterior largest ; each with two rows of double pores ; 
anterior odd one almost entirely obliterated, except a few 
rudimentary pores near the vertex; surrounded by a broad, 
rather sinuous peripetalous fasciole, which is double on the 
front sides, without any lateral or subanal fasciole ; mouth 
small, anterior; vent in the upper part of the hinder end 
covered with small scales ; ovarial pores two, three, or four, the 
hinder most permanent. 
Faorina, Gray, Ann. § Mag. N. H. 1851. 
Tripylus, sp., Philippi, Erich. Arch. 1845, 345. 
Like Brissiopsis, without any subanal fasciole. 
