CONTRIBUTIONS ON THE OCTOCORALLIA — BAYER 211 



Remarks: The massive, irregular sclerites of Corallium ducale 

 resemble those of C. hoshuense and C. sulcatum from Japan. From 

 both of those species C. ducale differs widely in its open, lateral- 

 dichotomous plan of ramification, lower autozooid calyces, and 

 presence of both 6- and 7-radiates as well as the usual 8-radiate forms. 



Family Parisididae AurivilJius, 1931 



It is quite clear from the descriptions of fossU Isididae that the 

 species involved are usually not attributable to Isis in a strict sense 

 nor even, in many cases, to the famU}'^ Isididae. Some of the fossil 

 species referred to Isis seem to belong rather to the Parisididae 

 (suborder Scleraxonia) , which are characterized by strong radial 

 ridges on the ends of the internodes. Thin sections of the fossils 

 have been neither illustrated nor described, and until such sections 

 are studied it cannot definitively be stated that these species are 

 unquestionably scleraxonians. Everj^ available clue indicates that 

 they are, however, and I therefore reassign those species which have 

 been sufficiently well illustrated to warrant the change. 



Parisis danae (P. M. Duncan) 



Isis Danae Duncan, 1880, p. 108, pi. 28, figs. 1-3. 



Radial ridges on ends of the internodes increasing in number by 

 intercalation rather than by dichotomy. Ramification from distal 

 ends of internodes. A large species; axis up to 1.2 inches m diameter. 



The intercalary increase of the radial lamellae may indicate a genus 

 distinct from Parisis. 



Horizon" and locality: Gaj series (Miocene): Naigh-Nai Valley; 

 5 miles northwest of Tong; Tandra R^him EQian (Sind). 



Parisis compressa (1*. M. Duncan) 



Isis com-pressa Duncan, 1880, p. 109, pi. 28, figs. 4, 5. 



Radial ridges on ends of internodes increasing in number by dichot- 

 omy. Branches large, laterally coalescent. 



Horizon and locality: Gaj series (Miocene): Tandra Rdhim 

 Khdn (Sind). 



Parisis sp. 

 Isis sp. 1, Duncan, 1880, p. 109, pi. 28, figs. 8-9. 



The illustrations of this fossU given by Duncan distinctly recall 

 the Recent Parisis fruticosa Verrill, but identity of the fossil with the 

 modern species must be verified by further study of specimens. 



Horizon and locality: Gaj series (Miocene): Naigh-Nai Valley, 

 southwest of Sehw^n (Sind). 



