20 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 16 



Genotype : Pocillopora acuta Lamarck. 



Pocillopora damicornis var. cespitosa Dana 

 Plate 1, figs. 3a, b, c 



Pocillopora cespitosa Dana van, Vaughan (1906), Bull. Mus. Comp. 



Zool., vol. 50, no. 3, p. 64, pi. 3, figs. 1, la, lb. 

 Pocillopora damicornis var. cespitosa Dana, Hoffmeister (1925), Car- 

 negie Inst. Wash., Pub. Dept. Mar. Biol., vol. 22, pp. 16-17. 



Corallum forming ovate clumps up to 180 mm in length, 80 mm in 

 M^idth and 130 mm in height, some of the colonies apparently living 

 unattached, branches terete, often flattened, 5-17 mm wide, with ascend- 

 ing, irregular, varied, usually small verrucae; branches usually bluntly 

 digitate at the ends, capped by small verrucae which are rounded at the 

 ends; calices small, 0.5-0.75 mm in diameter, subcircular or oval, moder- 

 ately deep, separated by distances varying from less than to equal the 

 calicular diameters ; calices crowded and angular at the ends of the 

 branches ; septa poorly developed, sometimes completely absent, but often 

 12 septa are represented by small spines on the calicular wall; in a few 

 rare cases the 12 septa are better developed and more apparent ; columella 

 variable in development, usually just moderately developed, slightly 

 styliform and situated on a directive ridge, in a few cases the columella 

 is fairly prominent, at which time the directive ridge extends only half 

 way across the calice ; on the older parts of the corallum the directive 

 ridge is better developed and just slightly raised ; spinules of inter- 

 calicular surface about twice as high as their basal diameters, conical in 

 shape but usually with a small tuft at the end ; towards the ends of the 

 verrucae the spinules are flattened. 



This species is distributed widely on the reefs of the Indo-Pacific. 



Hypotype: Cat. nos. 3.1 (Sta. 80-33), 3.2 (Sta. 252-34). 



Material exatnined: Stas. 80-33 (1), 252-34 (19), "Hood Island, 

 Galapagos, 1934" (19). Cat. nos. 3.1-3.3. 



Distribution: The Galapagos Islands, and Secas Islands, Panama. 

 Bathymetric range, shallow water. 



Pocillopora lacera Verrill 

 Plate 1, fig. 4 



Pocillipora lacera Verrill (1869), Proc. Essex Inst., vol. 6, p. 100; 

 (1870), Trans. Conn. Acad. Arts Sci., vol. 1, pp. 523-524. 



Verrill's 1870 description is as follows: 



"Coralla consisting of more or less irregular or rounded clumps of 

 long, irregular, often crooked, rough, and much subdivided branches. 



