ECIllNOliEEMA'tAt 661 
Ims probably been confounded with A. radiata of Zanzibar and the Indiail 
Ocean. 
ArhacidcS. 
Echinocidaris stellata (Blainv. sp.) and E. spatidigera (Val. sp.) arC de- 
scribed by Verrill, 1 . c. pp. 298-301. Verrill quotes E. longispina, Lut. 1864, 
and E. incisa, A. Agas. 1863, as synonyms of E. stellata. 
Echinidce. 
PsainmecJiinus pictuSf sp. n., Verrill, 1 . c. p. 301, Cape St. Lucas. 
Lytechinus roseus (A. Agas. sp.) is described by Verrill, 1 . c. p. 302* 
Eoletia viridts, sp. n., 1 . c. p. 304, Callao, Peru. 
Euryechinus imhecillis, Verrill, I, c. p. 305, This species may be the Echi- 
nus {Toxopneiistes) gihhosus, Agas. Nearly every specimen examined was 
irregular in outline. This irregularity, which often amounts to gibbosity, is 
irregular and inconstant, and is caused by a small parasitic crustacean {Fahia 
chiltmiSf Dana ; IHnnaxodcs hirtipes, Heller, appears to bo the same species)- 
The parasite would appear to force an entrance into the anal orifice when 
quite small, and causes a dilatation and malformation of the intestine, which 
eventually forms a membranous cyst. In one instance this cyst was an inch 
in length and half an inch in diameter, and enclosed a female crab of corre- 
sponding size. A large opening is maintained externally, out of which the 
claws of the crab may be thrust (but not large enough to allow it to go en- 
tirely out when fully grown)* 
Echinometridce. % 
Echinometra rupicola and E. van-hrunti, A. Agas., are described by Verrill, 
/. c* pp* 308, 309, the former from Panama and Peru, the latter from Aca- 
pulco* 
Bcutellidm. 
Encope occidentalism Verrill, 1. c. p. 309 = 15^. tetraporUm Agas. non Gmelin, 
Panama. 
Encope aherrans, sp. n.. Martens, 1. c. p. 112, Campeche Bay, West Indies. 
Mellita pacijica, sp. n., Verrill, 1. c. p. 313, Zorritos, Peru. 
Astriclypeusm g. n., Verrill, 1. c. p. 311. Ambulacral star as in Encope \ 
four genital openings, the posterior one wanting, as in Mellita \ with five hi- 
nnies or perforations in the prolongations of the ambulacra, as in Encope^ 
but destitute of any perforation or indentation in the posterior interambula- 
crum, like Lohophora. Anal opening round, about midway between the mouth 
and margin. Sulcations of the lowerside more simple than in Encope^ a pri- 
mary branch passing along close to the openings on each side, and sending olf 
numerous inconspicuous branches to the interambulacra. Actinal opening as 
in Encope. 
Astriclypeus man7ii, sp. n., Verrill, 1. c. p. 311, west coast , of North Ame-k 
tica (P). 
Cassidulid(Si 
Pygorhyncims pncijicus (Ag. MS.) is described by Verrill, 1. c. p. 316, from 
Xcapulco and Cape St. Lucas. 
Cassidulus canibbasarunim Lamk. The genus Phynchopygus wa^ established 
