ECHINODERMATA. 
649 
OphiotrichidoB. 
Ophiocnemis ohscura, 8p. n., Ljungman, 1. c. p. 333, Straits of Malacca. 
Ophiothrix {Ophiothcla) mirahiliSf sp. n., Verrill, 1. c. p. 2C8, Pearl Islands, 
Bay of Panama, clinging to a branched sponge and to Gorgonise. - 
Ophiotliela^ g. n., Yerrill, I, c. p. 2G9. This genus is founded for a group of 
Ophiurians agreeing : — in having the upper arm-plates covered with granula- 
tions as in Asfjrophyton \ in having short, rough arm-spines, mostly turned 
downwards, and armed with roughnesses or hooks beneath, as in Ophiactis 
in having very large radial shields covering most of the disk, the intervening 
spaces being covered with a skin bearing simple spines ; lower side of arms 
and disk covered with a skin, more or less obscuring the plates j mouth- 
shields and side mouth-shields united into a ring around the mouth ; six arms ; 
clinging to Gorgonicc. This genus is somewhat intermediate between 
Ophiothrix and Ophiactis, more nearly to the former. 
AstropliytidcB. 
Astrophyton panamcnse, sp. n., Verrill, I, c. p. 251, Panama and Pearl 
Islands, adhering to Muricccc. It appears to be most nearly allied to A, 
caryi, Lyman, from San Francisco. 
Asteroidea. 
Asterndm. 
Heliastet' helianthus, Gray, H. cumingii, Gray, II. microhrachia, Xantus, 
and II. huhiniji, Xantus, are described by Verrill, 1. c. pp. 289-293. 
Mithrodia hradkyi, sp. n., Yen-ill, l .c. p. 288, Panama. Verrill states that 
this species shows the propriety of retaining Gray’s genus Mithrodia, which 
was established for Asterias clavigera (Lam.). 
Asiropeciinida;. 
Astropccten fragilis, sp. n., Verrill, 1. c. p. 272, Panama; very near to A. 
regalis, J. E. Gray, which is here described (p. 273) as from Panama. Is A. 
coclacanthus, Martens, identical with this species ? 
• Astropccten peruvianus, sp. n., Verrill, 1. c. p. 276, Paita, Peru. Is this A. 
stellatus, J. E. Gray? ^ 
Astropccten oerstedii, Liit,, is described by Verrill, 1. c. p. 274, from Panama; 
A. edwardsii, Verrill, 7 c. p. 251. 
Luidia tessellata, Liitk., and L. helloncc, Liitk. Verrill, 1. c. pp. 271 & 293, 
describes specimens from Panama. 
Ccelasterias, g. n., Verrill, 1. c. p. 247. Large starfishes, with four rows of 
ambulacral suckers and large swollen rays (eleven in the typical species), 
which are free to near the base and are united beneath by a group of interra- 
dial plates. Interambulacral plates united directly to the first row of ventral 
plates, and these to a second row of larger plates, without the intervention of 
, open spaces like those seen in Asterias. Dorsal surface with large, strong, 
imbricated, irregularly arranged ossicles or plates, bearing sl\prt, very nume- 
rous spines. This genus is more closely allied to Asterias {Astcracanthion) 
than to Ileliaster, and approaches still nearer to Stichastcr, but appears very 
distinct from either ; its form and general aspect is tliat of a Solastcr^ (7, 
mi^tralkj sp. n., Ve|-rill, 1. c. p. ?47, Auckland, 
