Verrill, Notes on Radiata. 415 



covered with thorny warts, are abundant, esj^ecially in the superficial 

 layer, mixed with the last. Also much smaller and more slender 

 spindles, with few large warts. The club-shaped spicula are not 

 numerous and are variable in Ibrm; the larger end is not much 

 expanded, but covered with sharp and thorny warts, which decrease 

 to the somewhat acute, smaller end. The polyp-sj^icula fiom the 

 bases of the tentacles are relatively large, very long, slender spindles, 

 with acute ends, often curved, and covered uniformly with small, sharp, 

 conical warts. Some of the smaller ones are but slightly warted. 



The longer spindles measure -264""" by -096""", -240 by -108, -240 

 by -084, -204 by -072, '192 by -084 ; the stouter ones -144 by -084, -144 

 by •072; the "heads" -108 by -102, -144 by -126, -120 by -086, -108 

 by -084; the "clubs" -180 by -084, -180 by '078, -168 by '078, -156 by 

 •072 ; the polyp-spindles -264 by -054, '240 by -048, -240 by -042, '227 

 by -054, -204 by '042, -204 by -024. 



Panama and Pearl Islands, in pools at extreme low-water mark, — 

 F. H. Bradley ; Gulf of Nicoya, by divers,— J. A. McNiel. 



This species is very variable in form, and especially in the promi- 

 nence of the cells, or else there are two or more species here included. 

 The typical form, above described, has the cells large and raised on 

 prominent verrucie. The two principal variations from this type are 

 as follows : 



Var. Dowii VerriU. 



Similar in mode of branching to the preceding form but somewhat 

 more flal)elliforni and regular, branchlets rather smaller. Cells flat, 

 or scarcely raised, when contracted often eight-rayed. Spicula much 

 like those of the typical form. Color deejj red. 



San Salvador, — Capt. J. M. Dow ; Pearl Islands, — F. H. Bradley. 



"Var. pallida Ven-iii. 



Corallum more or less flabelliform, branching dichotomously, branch- 

 lets round, sometimes as large as the main stem, usually smaller. 

 Cells a little raised, forming low verruca". In fresh specimens, the 

 cells are often surmounted by a small conical mass of convergent 

 spicula, from the bases of the tentacles. Color dull grayish white, or 

 yellowish. In life, "stem white or light drab; polyps bright yellow," 

 — F. H. B. 



Spicula of the coenenchyma pale pink or colorless, transparent ; 

 polyp-spicula orange red. Longer spindles rather long and slender, 

 acute, covered with distantly scattered, unequal, prominent, rough 



Trans. Connecticut Acad., Vol. I. 53 December, 1868. 



