26 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 16 



Material examined: Hood Island, Galapagos (7). Accession no. 

 1097 (3).Cat.nos. 4.1-4.2. 



Distribution: The Galapagos Islands, and Taboga Bay, Taboga 

 Island, Panama. Bathymetric range, shallow water. 



Pocillopora porosa Verrill 



Pocillipora capitata var. porosa Verrill (1869), Proc. Essex Inst., vol. 



6, p. 99; (1870), Trans. Conn. Acad. Arts Sci., vol. 1, p. 521. 

 Pocillopora porosa Verrill, Durham (1947), Geol. Soc. Am., Mem. 

 20, pp. 16-17, pi. 8, fig. 5; pi. 10, fig. 8. 

 This species has been recorded previously only from the recent fauna 

 at La Paz. 



Hypotype: Cat. no. 5.1 (Sta. 129-34). 



Material examined: Sta. 129-34 (1 small specimen). 



Distribution: Braithwaite Bay, Socorro Island, 14-18 fms. 



Pocillopora robusta Verrill 

 Plate 1, figs. 5a, b, 6 



Pocillipora capitata var. robusta Verrill (1870), Trans. Conn. Acad. 



Arts Sci., vol. 1, pp. 521-522. 

 Pocillipora capitata var. pumila Verrill (1870), Trans. Conn. Acad. 



Arts Sci., vol. 1, pp. 522-523. 

 Pocillopora capitata var. robusta Verrill, Palmer (1928), Proc. Am. 



Phil. Soc, vol. 67, p. 21, pi. 2, fig. 1. 

 Pocillopora palmata Palmer (1928), Proc. Am. Phil. Soc, vol. 67, p. 

 31, pi. 2, figs. 2, 3; pi. 3, fig. 1. 

 Pocillopora robusta Verrill, Durham (1947), Geol. Soc. Am., Mem. 20, 



pp. 17-18, pi. 7, figs. 1, 2; pi. 8, fig. 6. 

 The growth forms of this species are numerous and varied and 

 several of them would be described as new species if intermediate types 

 were not present. 



The typical members form flattened, slightly clavate branches with 

 almost even, meandroid, smooth tops. The verrucae are long (7-10 mm), 

 ascending, slender, tapered, slightly flattened, varying from pointed to 

 blunt. The columella, when present, is usually styliform ; septa are not 

 usually evident, except the directives which form a low ridge. 



The first intermediate form has divided, flattened branches and the 

 verrucae are elongated as in the typical specimens but are much smaller, 

 ranging up to 5 mm in length. Twelve septa are evident, with a heavy 

 directive ridge and a small columella situated on top of this ridge. The 

 intercalicular spinules are typical. 



