MUSEUM OF COMPARATIVE ZOOLOGY. 113 



Acantliogoi'gia aspera Pour.T. (The generic name given by Gray has pri- 

 ority over the name Blcpharorjorgia Duch. and Mich.) 

 Slender, flabelliform, few-branched, sparsely beset with short spines. 

 Polyps rather scattered, long verruciform (length equal to four or five times 

 the diameter), with eight rows of spines longest at the ba<e and at the 

 summit of the polyp. Tentacles black, the rest of the polyps translucent. 

 Stem dark brown. The whole polypidom not more than two inches high. 

 By its spiny stum, and spines at the base of the polyp-, and by the greater 

 length of the latter, it differs decidedly from A. liirsuta Gray, A. Grayi and 

 lica Johnson, and from A. (Blepharogorgia) Schrammi Duch. and Mich. 

 In 270 fathoms, oil' Havana. 



Sorcoclyction rugosum Pour.T. 



Small polypidoms rising from creeping stolons, on pebbles. Like little 

 knobs, fragile, rough, closed by the contraction of the polyp by means of 

 about six irregular rough pieces meeting together. When opened, the 

 cavity ^iows six or eight membranous septa, nearly meeting in the cen- 

 tre. Stolons covered with irregular calcareous pieces. Color dirty white. 

 Diameter of polyps one tenth of an inch. In 270 fathoms off Havana. 



Caryophyllia forrnosa Pourt. 



More or less turbinate, on a rather thin curved, or straight stem. Costae 

 equal, distinct only near the calicle. Calicle circular or subovate, moder- 

 ately deep. Columella formed of four to six very flexuous or twisted 

 laminae. Six complete systems of septa. Four cycles. Septa thin, prom- 

 inent, sharp and rounded on the edge ; sparsely granulated. Those of the 

 third order sometimes flexuous near the inner end in some specimens. 

 Twelve pali, opposed to the third order, equal, large, flexuous, ornamented 

 with tubercles disposed in horizontal lines on the eonvexitv of the flex- 

 ures. The young are rather variable, sometimes long and cylindrical, with 

 the septa little developed and showing neither pali nor columella, and 

 sometimes very small and cup-shaped and showing pali and columella. 



The. largest are 1^ inches high: calicle 1 inch in diameter. 



Abundant in 270 fathoms, off Havana. Specimens mostly alive and 

 growing singly or attached to each other. 



It differs from C. Berleriana which has the costa? more prominent and 

 a different number of septa. I have not seen specimens or figures of C. 

 Guadulpensis, which is fossil in volcanic formations of Guadaloupe, and may 

 not be extinct. 



Deltocyathus Agassizii Porr.T. 



Corailum discoidal, free at all ages. Wall nearly horizontal, sometimes 

 with a nipple-shaped projection in the centre. Costas well marked, covered 

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