MUSEUM OF. COMPARATIVE ZOOLOGY. 59 



HYDROIDEA. 



Tabulata. 



Millepora alcieomis Linn. Ed. X. 175S; Agassiz, Florida Reefs, fig. (un- 

 published). 



Florida; L. Agassiz, D. P. Woodbury. — Hayti; D. F. Weinland. 

 M. moniliformis Dana is a form of this species. 



Millepora pumila Dana, Zooph. 1846. — Porto Cabcllo, South America; 



Coll. Harvard University. 



Millepora intrieata M. Edwards. 1857. — Manilla; J. Russell. 



Millepora insignis Verrill. 



Corallum forming large, meandering plates, giving off smaller plate9 

 at riglit angles to their surface ; the edges are thick, obtuse, often lobed, 

 and sometimes divided into short, irregular branches, obtuse at the ends ; 

 surface irregular, covered with small verrucae. Cells large for the genus, 

 the principal ones situated at the summit of slight prominences, surround- 

 ed by a circle of about six small ones. — Kingsmills Islands; A. Garret. 



Heliopora coerulea Blainville. 1830. 



Sy.v. Mtllepora ccerulea Pallas, 17GG; Madrepora ccerulea Esper ; 

 Pocillopora ccerulea Lamarck, 181 G. — Singapore; Capt. W. II. A. Put- 

 nam. 



Heliopora compressa A t errill. 



Corallum forming a thick, massive or incrusting base, from which it 

 rises into broad winding plates, thin at their edges, which give off from 

 their sides smaller plates and compressed, lobe-like branches. Cells some- 

 what larger than in the preceding species and more distant ; the minute 

 secondary cells are also less numerous and smaller. Surface of the ccen- 

 enchyma covered with crowded papillae, terminating in two or three 

 points. — Kingsmills Islands; A. Garret. 



Pocillopora caespitosa Dana. — Sandwich Islands; A. Garret. 



Pocillopora ligulata Dana. — Sandwich Islands ; A. Garret. 



Pocillopora nobilis Verrill 



Sy.v. Pocillopora verrucosa Dana, Zoophytes, p. 5 2D, pi. 50, fig. 3 (non 

 Lamarck). — Sandwich Islands ; A. Garret. 



Pocillopora Danse Verrill. 



Sy.v. Pocillopora favosa Dana, 1. c., pi. 50, fig. 1 (non Eur.). — Feejee 

 Islands; J. D. Dana. 



Pocillopora squarrosa Dana. 1847. — Feejee Islands; J. D. Dana. 



Pocillopora acuta Lamk. 1S16. — Feejee Islands; J. D. Dana. 



