MUSEUM OF COMPARATIVE ZOOLOGY. 109 



Dasmosmilia variegata Pourt. 



Parasmilia variegata Pourt. 

 Bathycyathus elegans Stdder. 



Plate II. Figs. 11 and 12. 



The wall measures only 0.003 in thickness in a full-grown specimen ; few 

 specimens are therefore obtained entire, and fewer yet are free from deformity 

 from former breakages. Most fragments seem capable of forming new indi- 

 viduals by completing lost parts ; sometimes two individuals rise from the septa 

 of one fragment ; in that case one of them is most probably a true bud. 



In 164 fathoms, off Grenada. 



Parasmilia fecunda Lindstr. (Pourt. sp.) 



Cce.Iosmilia fecunda Podrt. 

 Ccenosmilia arhuscula Pourt. 

 Blastosmilia Pourtalcsi Dung. 

 Anomocora fecunda Studer. 



From the examination of a large number of specimens it appears conclusively 

 that Ccelosmilia fecunda and Coenosmilia arhuscula are but accidental variations 

 of the same species. The arhuscula form is the normal one, represented by 

 shorter and more massive corallites, with well-developed columella; the 

 fecunda form has grown under circumstances which forced it to elongate 

 beyond measure, and at the same time to form all its parts, such as the wall, 

 the septa, and the columella, thinner and more scanty. The extreme forms 

 are easily distinguished as very different, but there are numberless inter- 

 mediate ones, often parts of the same stock. 



With regard to the apparent budding, numerous alcoholic specimens show 

 that Lindstrom's remark, that the young do not arise through gemmation, is 

 perfectly correct. There is not a single case where the young grows from a 

 living specimen ; the supposed parent has in every instance the appearance of 

 having been dead for some time. It is, however, singular, that in many 

 instances the young are grouped with a certain regularity around, and at a 

 little distance from, an older calicle. If, then, the propagation is by eggs, there 

 remains very little reason for separating this form from Parasmilia proper. 



Range from 73 to 450 fathoms, in nineteen stations, off Santa Cruz, Mont- 

 serrat, Guadeloupe, Dominica, Martinique, St. Vincent, Grenadines, Grenada, 

 and Barbados. 



Asterosmilia prolifera Pocrt. 



Ceratocyathus prolifer Pourt. 

 Paracyathus arcuatus Lindstr. 



Plate II. Figs. 9 and 10. 



A careful revision shows that I committed a double error in referring the 

 specimens in question to the genus Ceratocyathus, and in placing the latter 



