REPORT ON THE ALCYONARIA. 279 



la the Pacific Ocean five species are found, extending from Japan, Ceratoisis 

 japonica, Std. and Ceratoisis paucispinosa ; the Philippines, Ceratoisis j^hilipjmiensis ; 

 and the Kermadec Islands, Ceratoisis grandijlora, Std. and Ceratoisis nuda. 



Callisis, Verrill. 



It may be doubted if this genus differs from Ceratoisis ; the only sijecies, Callisis 

 fiexihilis, V. (Isisjlexibilis, Pourt.), is from the West Indies. 



Isidella, Gray. 



Taking Isidella neaptolitana (Koch) as the type, it is apparently only found in the 

 Mediterranean. 



Acanella, Gray. 



The principal area of the species of this genus would seem to be the Northern 

 Atlantic, where Acanella arbuscula, Y. Johns., is found ofi" the Canaries and Madeira; 

 Acanella ehuraea (Pourt.), Sombrero Island ; and Acanella simplex, V., ofi" the Bermudas ; 

 besides other species described by Venill, from the voyage of the " Blake ; " of which 

 Acanella normani, V., occurs from Martha's Vineyard to the south coast of Iceland and 

 Greenland. Three species have been found in the Pacific Ocean, though at very wide 

 intervals from each other — Acanella chiliensis in the Messier Channel, Acanella rigida 

 ofi" Banda, and Acanella gregorii, Gray, ofi" Japan. 



Sclerisis, Studer. 



The only species of this genus, Sclei^isis pidchella, Studer, was found at a depth of 

 597 fathoms, in lat. 35° 21' S., long. 175° 40'. 



Bathygorgia, Perceval Wright. 



The only species of this genus, Bathygorgia profunda, Perc. Wright, was dredged ofi" 

 the coast of Yokohama, in lat. 35° 41' N., long. 157° 42' E. 



Pnmnoisis, Wright and Studer. 



The species of this genus appear to be essentially Antarctic. Primnoisis antarctica, 

 Std., Primnoisis sparsa, Primnoisis amhigua, were found in comparatively shallow 

 water at Prince Edward Island and Kcrguelen, but Primyioisis rigida was dredged from 

 deep water in the Atlantic Ocean, at Pao de la Plata, and Primnoisis (Isidella) cajicnsis, 

 Std., off" the Cape of Good Hope. 



