MUSEUM OF COMPARATIVE ZOOLOGY. 105 



The calicle is circular, with a moderately deep fossa. The septa are somewhat 

 exsert, thin, rounded, with granules on the sides, arranged in rows parallel to 

 the edge. Four cycles and part of the fifth in most of the systems, which are 

 thus somewhat unequal. Pali prominent and large, rather irregular, sometimes 

 two or three lobed ; columella much looser than in the other West India 

 species. The young have a very loose structure, with thin lamellar pali, and 

 rudimentary columella not yet developed into pillars. 

 ' Largest specimens, 30 mm. high ; diameter of calicle, 19 mm. 

 Kange from 88 to 164 fathoms, in four stations, off Montserrat, Martinique, 

 and Grenada. 



Paracyathus DeFilippii Duch. & Mich. 



Very variable species, which may in the end be found identical with the 

 Mediterranean species, P. striatus and pulchellus. I have had no opportunity 

 for direct comparison. 



Range from 56 to 458 fathoms, in sixteen stations, off Santa Cruz, St. Kitts, 

 Montserrat, Dominica, Grenada, Bequia, and Barbados. 



Ceratotrochus typus Pourt. 



Conotrochus typus Seg. 

 Ceratotrochus hispidtis Pourt. 



A few more specimens obtained make it evident that the two corals above 

 named are the same. I have before me specimens entirely or partially covered by 

 an epitheca, or completely destitute of it. The last I have called Ceratotrochus 

 hispidus. The genus Conotrochus of Seguenza, also adopted by Reuss and 

 Duncan, must necessarily be dropped, since it differs from Ceratotrochus only 

 by the presence of an epitheca. Ceratotrochus multispinosus has, according to 

 M.-Ed wards and Haime, a partial epitheca ; and, looking over a series of specie 

 mens from the Italian tertiary, I find that the character is just as variable, the 

 epitheca being total, partial, or absent. 



It is rather unfortunate to have to retain Seguenza's specific name for a 

 species not very typical in its characters. 



Range from 250 to 400 fathoms, in two stations, off Havana and St. Kitts. 



Flabellum Moseleyi Podrt. 



Plate II. Figs. 13 and 14. 



Corallum -with a rather long and slender peduncle, strongly curved in the 

 plane of the smaller diameter; a scar of attachment at the end. Calicle 

 widely open, elliptical, diameters as 1 to 1.3. Margin horizontal. Costee of 

 the first and second order about equal, forming stout more or less knotty 

 ridges ; the lateral ones not very different from the others, except in the 

 younger stages, where they are cristiform. The other costse are represented 



