650 
ZOOLOGICAL LITERATURE. 
Coscinasterias, g. n., Verrill, 1. c. p. 248. Starfishes with many rays, which 
are elongated, slender, and united only at the base, without interradial plates 
beneath j disk small j ambulacra broad, highly developed, suckers very nu- 
merous, in four rows j spines prominent, arranged in longitudinal rows on 
the rays j dorsal surface with large scattered pedicellaria) ; madreporic plate 
large, irregular, often with several accessory ones placed irregularly on va- 
rious parts of the disk j dorsal plates (ossicles) arranged much as in Asterias. 
C, muricata, sp. n., Verrill, 1. c. p. 249, Auckland. 
PentacerotideB. 
Oreaster occidentals^ sp. n., Verrill, 1. c. p. 278, Panama. Allied to O. 
gigasj and may be the adult condition of Oreaster (Pe?itaceros) cumingii, 
Gray. 
Oreaster {Nidorelliay Gray) armatm, Gray, Verrill, 1. c. p. 280. Eight 
specimens of this species were found. To the synonymic list add Gomodiscus 
conifer y Mobius, Neue Seesterne, p. 10, Taf. 3. figs. 5 & 6. 
Goniodiscus stelloy sp. n., Verrill, 1. c. p. 284, Cape St. Lucas. Verrill seems 
to think that this species will eventually prove to be but the young of Nido- 
rellia armata. The trivial name has been already applied by Mobius to a 
species of this genus from the West Indies which is certainly not G. stella of 
Verrill and is, according to Gray, yery nearly related to his Tosia grandS. 
Ophidiaster (Fharia) pyramidatus (Gray) is described by Verrill, 1. c. p. 287. 
It occurs through the whole extent of the Panamic zoological province. 
Linckia unifascialis (Gray), from Panama, is described by Verrill, 1. c, 
p. 285. 
AsterinidcB. 
Asterina {Asteriscus) regidaris, sp. n., Verrill, /. c. p. 260, Auckland. 
Asterina (Asteriscus^ modesta, sp. n., Verrill, 1. c. p. 277, Panama. 
Patiria obtusa, Gray, from Panama, is described by Verrill, 1. c, p. 270. 
• Ptcraster crihrosusy sp. n., Martens, 1. c. p. 100, Taf. 3. fig. 2, Ibiind near 
Zanzibar. 
Echinoidea. 
CidaridcB. 
Cidaris thouarsii, Agas. & Des., described by Verrill, 1. c. p. 294, from Pa- 
nama. 
Diademida, 
Echinodiadema, g. n., Verrill, 1. c. p. 295. Test depressed, circular ; actinal 
cuts slight ; buccal membrane with five principal groups of oblong scales, 
bearing numerous slender spines and pedicellariae j ambulacral pores trigemi- 
nate, the poriferous zones wider beneath, where the rows of three pairs are 
more transverse j tubercles arranged much as in Diadema, two principal rows 
in the ambulacra and four in the interambulacra, of which the pxternal ones 
are smaller and? border the poriferous zones ; anal membrane small, covered 
with small scales ; spines long, slender, hollow, externally resembling those of 
Diadema. 
- Echinodiadema coronata, sp. n., Verrill, 1. c. p. 295, Cape St. Lucas. 
Astropyga venusta, sp. n., Verrill, 1. c. p. 29G, Panama. Verrill states it 
