G30 
ZOOLOGICAL LITERATURE. 
Ctenactis (Agass. MS.), /. c. p. 51, for JEungia eeJdnata (Pallas). 
Trachypora, 1. a. p. 53. Corallum explanate, tliin j below echiiiate and 
coarsely costate ; above with scattered polyp-centres destitute of walls, with 
one or two c^^cles of septa, radiating at the centres, but becoming subparallel 
between them as in JIalomitra, strongly dentate or laceratoly lobod, the 
strongest lobes sniTomiding the polyp-centres ; columella loose, trabecular. T. 
luccray sp. n., Verr. ibid., Singapore. 
Acanthoporay 1. c. p. 54, for Bcldnopora horrida (Dana). 
Clavarma, 1. c. p. 56. Corallum compact, branching, cells imperfectly cir- 
cumscribed, but not confounded, in series ; septa and walls thiclcened, the 
former lacerate, toothed, with paliform teeth at the bases. Columella rudi- 
mentary. 
Aulactinia, I c. p. 57. Column elongated, upper portion capable of involu- 
tion ; walls with prominent verrucae in longitudinal rows on the upper por- 
tion, the marginal ones larger, trilobed, the lobes again subdivided on the 
lower side ; tentacles short, subequal. Sp. A. capitata (Agass. MS.), sp. n., 
Verr. ibid. 
Stephcmocora, g. n., Verrill, Proc. Dost. Soc. N. II. x. p. 330. Allied to 
Synavma (Verr.) and Psammocora ; cells rather large, with one or two cycles 
of septa, which are deeply toothed at edge, and generally confluent with those 
of adjacent cells ; walls indistinct or wanting ; columella papillose; pali pa- 
pilliform. Sp. 8. stcllata, sp. n., Verr. ibid., Panama and Pearl Islands. 
Pachysammia, g. n., Verrill, Proc. Essex Inst. v. p. 30. Corallum massive 
and incrusting, consisting of several corallites united together near their sum- 
mits by a massive coenench5mia ; budding lateral, irregular ; surface of the 
ccenenchyma with waving ribs as in PendropliylUa ; four complete cycles of 
septa ; columella not salient, rudimentary or trabecular. Sp. P. valida, sp. n., 
ibid., Hong Kong. 
Codasti'ea, g. n., Verrill, 1. c. p. 32. Corallum massive, cellular, fasciculate, 
formed by prismatic corallites, intimately united by their walls, which are 
thin and simple ; the exterior of the corallum is destitute of an epitheca, 
lobed and distinctly costate like that of Metastrea ; the cells are polygonal, 
often closed below by the dissepiments, which, occurring at the same level, 
unite from all sides, thus forming transverse septa ; in a transverse section 
traces of a very rudimentary and loose columella are seen in some cells ; septa 
in three or four cycles, unequal, the inner edges prolonged into strong paliform 
teeth. C. ternds, sp. n., 1. c. p. 33, Sandwich Islands ? 
Cyelopora, g. n., Verrill, 1. e. p. 38. Corallum branching in a plane ; cells 
open and deep, arranged in series.on the sides of the branches, with two cycles 
of septa more or loss complete, without an apparent columella ; septa united 
by their inner edges, so as to form a ring surrounding the central space, and 
cutting off* the interseptal chambers. Type Allopora hella (Dana). 
Neiv species : — 
Sayartia leucolena, Vemll, Proc. Dost. Soc. N. II. x. p. 330, and 8. modcsta, 
Verr. 1. c. p. 337, New England (Virg. fauna). 
Cercus clisa, Lossona, Atti Soc. Ital. di Scion. Natur. vol. viii. 1860, p. , 
tav. V. flg. I, from Spezzia. 
Ccrianthus aminicanus (Ag. MS.), Verrill, List t&c. p. 50. 
Madrepora. Verrill (Proc. Essex Inst, v.) describes the following new 
