MUSEUM OF COMPARATIVE ZOOLOGY. 101 



Caryophyllia maculata Mos. 



Bathijcyathus maciUatus Pourt. 



Mr. Moseley has, I think, rightly placed Bathycyathus in the genua 

 Caryophyllia. 

 In 88 fathoms, off Montserrat. , 



Stenoeyathus vermiformis Pourt. 



Plate I. Figs. 16, 16. 



I cannot find in my specimens the dissepiments mentioned by Mr. Lind- 

 strom. His figures represent sections near the centre and near the exterior 

 wall, where there are connecting bands ; but I have always found the central 

 part of the chambers unobstructed from end to end. In PI. I. Fig. 15, I have 

 given a figure of a decalcified specimen, showing the complete cast of the 

 inside cavity ; the outside is entirely uninterrupted by any dissepiments, and 

 shows only the regular little knobs formed by the contents of the small 

 cavities in the wall. In Fig. 16 two of the segments are separated so as to 

 show the bands connecting them between the pali and the septa. ^ 



Range from 191 to 400 fathoms, in two stations, off Havana and Martinique. 



Thecocyathus cylindraceus Pourt. 

 Range from 84 to 250 fathoms, in three stations, off Havana and Barbados. 



Troohocyathus Eawsonii Pourt. 



Specimens fixed by a rather large base are the most common form, free 

 individuals being comparatively rare. When fixed, there is not much difference 

 from the genus Paracyathus, unless it is the more regular pali. 



Range from 82 to 221 fathoms, in four stations, off Grenada and Barbados. 



Trochocyathus coronatus Pourt. 



Odontocrjathus coronatus Mos. 



Very fine specimens, both living and dead, were obtained, but no young ones. 

 Range from 333 to 861 fathoms, in four stations, off Virgin Gorda, Dominica, 

 and Grenada. 



Deltocyatlius italicus Edw. «& H. 



Plate I. Figs. 1-8. 



I have adopted the name of the original fossil species for the exceedingly 

 variable living forms, as Prof. Duncan has done before, the differences between ^ 

 the living and the fossil being less than between the different living varieties. 

 The living attain a larger size than the fossil forms. 



