95 



In appearance this coral is exactly like a Caryophyllia, the pali, 

 though beiug present before all the septa except those of the last 

 cycle, standing in a single ring. It has a striking resemblance 

 to the Paracyathus pulchellus (Phil.) figured by Lacaze-Duthiers 

 in Arch. de Zool. Expe'rim. (3) V. 1897, PI. VII, ouly the pali 

 are more regular than in the last species. As regards the pali, it 

 has a close resemblance to Paracyathus coronatns Duncan (Proc. 

 Zool. Soa, Lond., 1876, p. 432, pi. XXXVIII, Fig. 1). 



9. Trochocyathus Weberi n. sp. 



This beautiful species is closely related to T. phüippinensis Seniper 

 (Zeitschr. f. wiss. Zool. Bd. XXII, 1872, p. 253, Taf. XX, Fig. 16) 

 from which it differs in having the corallum much compressed 

 and the septa more numerous. 



Corallum strongly compressed, flabelliform, with a scar of 

 attachment and a pair of little ear-like processes, formed by the 

 lateral costae, at the base. 



Thecal wall naked, glistening, costae indistinct except uear the 

 calicular margin, where they are trenchant, fairly prominent, and 

 microscopica^ly serrulate, The lateral costge are no more distinct 

 than any of the others except near the base, where they expand 

 to form a rather crumpled winglike lamella, something like that 

 of Tropidocyathus on a small scale. 



Calicular orifice strongly elliptical, the major axis on a very 

 slightly lower plane than the minor ; calicular fossa deepish. 



Septa stout, moderately exsert, their edges straight, their surfaces 

 finely echinulate. They are in six systems and five cycles, the 

 fifth cycle being incomplete. Those of the first two cycles, which 

 are equal, are decidedly the largest and most exsert; those of 

 the lower cycles diminish very slightly in size in serial succession. 



The pali, which are laminar and finely echinulate like the 

 septa, are about 36 in number; they stand opposite the septa of 

 all but the last cycle, those opposite the first two cycles beiug 

 the smallest, and those opposite the third cycle (or the fourth 



