Genrral Ifisfor?/ of (he Marine Poli/zoa. 477 



Report, p. 107), nioiitiojis a amall avicularium, witli an 

 aculc trinn^'ular niandihlc close to the orifice, wliicli is not 

 iticliidtvl in Miy dlai'-nosis. 



Additwnal Locality. " Off Heard Island, 70 fatli., volcanic 



1 n ' 



Ibid. (p. G4 Sep.). 



ScMzoporella tumida, sp. n. 



This species is one of a f^'i'^uj) of allied forms wliicli are 

 all distingnislied by the possession of an avieuliferous suboral 

 swelling, differing in size and shape, but the same in general 

 character. Thev are S. Ridley i, j\IacG., Escharina simplex ^ 

 D'Orb., EscJi. Edivardsiana, D'Orb., and the present species. 

 I was at first inclined to identify S. Ridleyi with Escharina 

 simplex, D'Orb. ; but Mr. Quelch, who had the opportnnity 

 of examining the type specimens of the former, has arrived 

 at a different conclusion, and. as my knowledge of them is 

 derived entirely from figures and descriptions, I readily aece])t 

 his decision. They arc clearly very nearly related. S. 

 tumida has much in common with D'Orbigny's species, but 

 there is a marked difference in the form of the mouth and the 

 character of the suboral swelling, which is of ampler size and 

 more regular shape, forming a thick rounded collar round the 

 front and sides of the orifice. This species is also furnished 

 with another form of avicularium (in addition to the suboral 

 form) borne on a large ovate rising on the surface of the cell 

 which lies alongside the orifice and extends for some distance 

 downwards. 



It is also remarkable for its perfectly smooth surface. 



Escharina Edwardsiana, D'Orb., is another species with 

 the same general character of orifice and suboral region, but 

 exhibiting some minor differences. 



These species represent to all appearance slight modifica- 

 tions of one and the same type. 



Ibid. (p. (S2 Sep.). 



Schizoporella acuminata, sp. n. 



The acuminate extension of the cell above in this species 

 appears not to be so permanent a character as I had supposed. 

 Mr. Waters has obtained S. acuminata from the Australian 

 Tertiaries, and finds that this is not a constant character in 

 fossil specimens. " Some cells," he says, " are acuminate, 

 while others are round, and I have specimens from Bairns- 

 Ann. d; Mag. N. Hist. Scr. 6. Vol viii. 33 



