A. E. Verrill — Corals of the Genus Acropora. I'Ol 



Septa veiy narrow in all the calicles : usually there are six nanow 

 primaries, the directives a triHe wider; sometimes a few rudimentary 

 secondaries are also present. 



Coenenchyma irregularl}- and roughly pitted, or verniieulate and 

 echinulate. 



Kingsmills Islands (coll. A. Garrett). Received from the Mus. 

 Comp. Zool. No, 1007. 



The above description is from one of the original types. In 

 general appearance and mode of growth it considerably resembles 

 A. graitdis (Brook) and A. intermedia (Brook), as figured b}' Brook 

 (op. cit., 1)1. i), but the corallites of both these are quite different, _ 

 being small and with a more nearh- terminal ai)erture than in our 

 species. 



Acropora Ehrenbergii (E. and Haime) var. scandens ? 



? Madrepora Ehrenbergii Edw. and Haime, Hist. Corall., iii, p. 143. 

 ? Madrepora scandens Klnnz., Corall. Rothen Meeres, ii, p. 36, pi. ii, fig. 6, 

 pi. iv, fig. 3, pi. ix. fig. 21. Brook, p. 48. 



Plate XXXVI D. Figure 6. Plate XXXVI E. Figure 3. 



A large and fine specimen, apparently of this species, but not 

 agreeing very closely with the descriptions, was studied b}' me. 

 It was formerly in the Ward collection. 



It con.sists of a ver\- large, one-sided, irregularly leticulated coral- 

 lum, about three feet (9()0"^"^) broad and two feet (600'"'") high. It 

 ai'ises obliquely from a stout pedicel. The main branches, which are 

 25-62""" in diameter, diverge and- rapidly subdivide into smaller 

 branches, Avhich are veiy proliferous, the branches being arranged 

 somewhat in one plane. The distal small branches rise up very 

 obliquely and have tapering tips ; many small, short, proliferous 

 branches, with similar tips are scattered over the upper side of the 

 frond. On the under side the branches coalesce into an oj^en reti- 

 culum, with large, unequal and very irregular meshes, 75 to lOo'""' 

 long and 25 to 38""" wide. 



The larger basal branches bear divaricate, conical branchlets, 10 

 to 20""" long, 5 to lO"""" thick, and others 50™'" or more long, and 12 

 to 15""* thick, which are proliferous and bear smaller divaricate, 

 conical branchlets, 5 to 12"^"" long. These small, conical branchlets 

 have a large, conical axial corallite, often 5 to 12""" long and 3 to 5""^ 

 in diameter at base. They are covered with round, short-tubular, 

 obliquel}' truncate corallites standing at about 45°, with around, open 

 calicle; outer lip thickened, obtuse. 



