Verrill, JVbtes on Radiata. 523 



large, horizontal often forked, branch-like base. These clumps seem 

 to have originated from large detached branches, which have been 

 broken from specimens of the preceding form and, having fallen to 

 the bottom, have served as bases for the numerous rising branchlets, 

 which probably arose from the original verrucas by excessive enlaro-e- 

 ment and gradual alteration to the form of branches, the largest of 

 \\ hich subdivide and develop verrucae like those of the parent form. 

 Cells and ccBnenchyma as in the preceding variety. 



Length of the clumps 6 to 1 2 inches ; breadth 3 to 5 ; height 2 to 

 4 ; length of branches -50 to 2 ; their diameter 25 to 50. 



Gulf of California, with the preceding, — J. Pedersen. 



About a dozen specimens of this variety have been received. 



In general appeai'ance it is very different from the normal form. 



Pocillipora lacera Veniii. 



Proc. Essex Institute, vol. vi, p. IdO, 1869. 



Coralla consisting of more or less irregular or rounded clumps of 

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

 The branchlets are short and lacerately or digitately divided and 

 lobed at the ends, the subdivisions small, variously shaped, often slen- 

 der, but generally more or less compressed and obtuse at the tips, 

 often having the appearance of elongated verruca?, while the lateral 

 branchlets pass gradually into the verrucae, which are few, irregular, 

 and distajitly scattered on the larger branches. Lateral cells rather 

 large, round, rather distant, often shallow; septa mostly 12, narrow, 

 usually subequal, sometimes one is larger, often all are rudimentary 

 or wanting. Columella rudimentary or wholly abortive. Coenen- 

 chyma abundant between the cells, firm, the surface finely and evenly 

 spinulose. 



The larger specimens are 6 to 8 inches in diameter and height ; the 

 large branches "30 to "50 in diameter ; and 2 to 6 long ; the terminal 

 branchlets mostly "lO to "30 long; "10 to -15 in diameter; the cells '03 

 to "04 of an inch in diameter. 



In life, according to ilr. Bradley, the polyps are small, exsert, with 

 twelve equal cylindrical tentacles, which are swollen at the tips ; they 

 are about equal in length to the diameter of the body, and they are 

 arranged in a single circle around the margin, but six are held hori- 

 zontally and six upright in expansion. The color of the polyps is 

 dark brown, greenish brown, or dark green ; tentacles dark brown, 

 the tips white. 



" In arrangement and form of tentacles this species closely resem- 

 bles the accompanying Forites {P. Panamensis), which also haa 



