hill: geology of Jamaica. 243 



base of one attached young individual measured, greater diameter, 7 mm.; 

 lesser, 5 mm.; heiglit, 3.5 mra. The ba^e may be larger or smaller, judging 

 from otlier imperfect young. From these data, the corallum is tall, subclavate, 

 gradually enlarging upward, attached by a moderately large base, with a 

 slightly elliptical cross section. Strictly speaking, there is no wall, the septa 

 joined in their distal portions by numerous synapticula). Externally the 

 corallum is ornamented by very many very fine costa3 (the peripheral ends of 

 the septa). The costae show sometimes a faint, sometimes a distinct, alterna- 

 tion in size; the edges are granulate. Between the costae are numerous delicate 

 s3''napticuloe. There is no epitheca. Septa very crowded, numerous ; 144 were 

 counted on the smaller end of the type ; some small ones may have been over- 

 looked. There are five complete cycles, and many members of the sixth. 

 There is some anastomosing among the septa, the 1st, 2d, and 3d cycles reach- 

 ing the axial space. The septa are very thin, very perforate, and synapticulse 

 are very abundant in the peripheral portion of the corallum, making a good 

 substitute for a wall. Dissepiments may be present. I was unable to deter 

 mine this. On the sides of the septa, pointed granulations are quite frequent. 

 There is no true columella, but a few processes from the larger septa form a 

 very lax and very insignificant false one. The calice in the specimen has been 

 destroyed, but it can be seen that the fossa was moderately deep. 



Locality. Solomon Mountain, west of Mint, "Westmoreland Parish (R. T. 

 Hill). 



Type. Museum of Comparative Zoology, Harvard University. 



Remarks. Every character of the coral seemed to agree with those of Lep- 

 tophyllia. For a description of the detailed characters of the genus, Pratz's 

 " Ueber den Aufbau des Septalapparates einiger charakteristischer Gattungen" 

 should be consulted.^ 



TURBINOSBRIS, Duncan. 



Much difficulty has been experienced in trying to place generically the two 

 corals next to be described. This difficulty has arisen from the insufficiency 

 of the original characterization of the genus. Duncan proposed the genus ^ 

 for a new species called by him Turhinoseris de-fromenteli from the Lower 

 Greensand, giving the following generic diagnosis: " The corallum is simple, 

 more or less turbinate, or constricted midway between the base and calice. 

 The base is either broad and adherent, or small and free. 



" There is no epitheca, and the costse are distinct. 



"■ There is no columella, and the septa unite literally \siCf laterally], and are 

 very numerous.*' 



1 Palaeontographica, 1882, Bd. XXIX. pp. 90-92. 



2 Monograpli Brit. Foss. Corals, 2d series, Palaeontog. Soc., Vol. for 1869 (1870), 

 pp. 42, 43, Plate XV. Figs. 13-18. 



