POLYPS AND COKALS. 99 



POCILLIPORA ELONGATA Dana. 



Zoophytes, p. 531, Plate 59, fig. 4, 4b, 1846. 



The original specimen of this fine species is also in the 

 Museum of Yale College. It consists of very long, 

 stout, furcate, rounded branches, about an inch in diame- 

 ter, and often six inches or more long. The ends are 

 obtuse, generally not much dilated, the longer ones with- 

 out terminal verrucas, the shorter ones with prominent 

 ones. The lateral verrucas are quite regularly scattered 

 throughout, usually at distances greater than their diame- 

 ter, prominent sub-conical, rounded, often standing nearly 

 at right angles to the surface. The cells are neatly 

 stellate, not large, well separated below, towards the ends 

 of the branches becoming polygonal, separated often by 

 a slight suicus and a single row of spinules, and appear- 

 ing sunken below the surface. The twelve septa are well 

 developed, the six primaries often wider and thicker than 

 the secondaries. The spaces between the septa are 

 usually somewhat filled up and the edge of the cells is 

 enlarged or excavate, giving them a sunken appearance. 

 The collumella is small, but prominent and acute, often 

 wanting. Surface of the ccenenchyma rough, with rather 

 large, sharp, conical, spinule-like granules, which are 

 evenly scattered, not crowded. Texture rather porous, 

 the cells but little filled up below, and often show the 

 transverse plates throughout. The whole height of the 

 coral is about fifteen inches. 



Ceylon. Rev. G. A. Apthorp. 



POCILLIPORA CAPITATA Verrill. 



Bulletin Mus. Comp. Zoology, p. 60, 1864. 



Socorro Isles ; Acapulco ; La Paz ; Pearl Islands, Pan- 

 ama Bay. 



Var. POROSA, nov. 



Corallum forming large rounded clumps, twelve to fif- 

 teen inches in' diameter, with more or less elongated, sub- 

 parallel, angular branches, which are from .25 to .75 of 



