CATALOGUE OF ECHINLDA. 
49 
extremity, covered with small irregular plates ; spines of the 
crown elongate, subulate, of the plastron and subanal plate 
larger, stronger, rather dilated at the end. 
Kleinia, Gray , Ann. & Mag. Nat. Hist. 1851. 
This genus differs from Brissus in the peculiar form of the 
ambulacra, and in the larger size of the dorsal spines and 
tubercles ; and from Plagionotus , in the form of the subanal 
plate and ambulacra. 
I. Kleinia Luzonica. 
Shell ovate, ventricose ; ambulacra confluent near the vertex ; 
inner series of pores nearly obliterated ; lateral ambulacra 
ovate, petaloid ; the hinder pair shorter, nearly parallel ; ante- 
rior pair divergent ; vent in the upper part of the high hinder 
extremity. 
Kleinia Luzonica, Gray , Ann. &' Mag. N. H. 1851. 
Hab. Philippines. Isle of Lucon. 
a, b, c, d. With spines. Isle of Lucon. Mr. Cuming’s 
Collection. 
II. Ambulacra continued perfect to the vertex; internal fasciole 
none ; peripetalous fasciole distinct. — Brissina. 
c. Lateral ambulacra similar , generally sunken ; lateral fasciole 
none. 
* Subanal fasciole ring -like. 
6. Eupatagus. 
Shell thin, elliptical, more or less depressed ; ambulacral 
petaloid, anterior pairs broad, anterior odd one in a broad 
groove ; interambulacral area with scattered large crenulated 
tubercles ; peripetalous fasciole surrounding the ambulacra and 
larger tubercles ; the subanal fasciole surrounding the cordiform 
shield ; mouth large, semicircular, with indistinct oral perfora- 
tions ; lower surface with a broad naked band, corresponding 
with the hinder ambulacra, and with cup-like tubercles in the 
interambulacral area. 
Eupatagus, Agassiz Ac Besor , Ann. Sci. Nat. series 3, viii. 9, 
1847, -r. 
1. Eupatagus Valenciennesii. 
Ovate, the large tubercles few, and near the peripetalous 
fasciole. 
F 
