52 ANTIPATflARIA. 



Haplophyllia paradoxa Pouut. 

 Plate 11., (i-s. n, 12, 1111(1 13. 



Corallum suIjca rmdriciil. .-^lioit, (ixcnl l)_v a bioad Ijase ; epitlieca thick, 

 wrinkled, loachhig above the border of the caliele, and Ibrining aioiuid 

 the latter several concentric circles, as il' I'oniied of several la vers. 

 Calicle circular, fossa deep. S('])t;i Muooth. without granulations or 

 perforations, not reaching the bonier of the c;ilicle, with smooth cu- 

 ainelled surfoce, like the other internal parts of the calicle. Colunu'lla 

 formed of two smooth conical processes, verv thick at the base and 

 tending to fill up the chambers. Eight septa larger and connecting 

 with the columella, alternating with smaller ones, which touch the 

 columella at a much lower level. A further cycle is indicated by mere 

 rudiments in some of the chambers. In the specimen there ai'c irreg- 

 ularities in two of the s_ystems or halt-.systems, one of which is closed 

 by a horizontal plate, probaijly to exclude a ])arasitic intruder. 



Polyp scarlet, greenish in alcohol, with aliout sixteen rather long 

 tentacles, bluntly tuberculated at the tip. 



Height IS) cm., diameter 1.2 cm. 



Oli'Baliia Ilomla, Fioii.la, in ;fL'l fatlioin.-i. 



Suborder ANTIPATHARIA M.-Edw. & Haime. 



This suborder, with one single family, the Aiitipathid;e, constitutes a 

 wvy natural and homogenous grouji. if we remoxc from it the genus 

 (Jerardia, of riaca/.c-Duthiers, which has no other relationshi]) with the 

 other genera than the pro])eity of secreting a homy jiolypidom. 'i'he 

 jiolyps of a (Jerardia differ in no particular from those of most of 

 the Zoanthidiv in the arrangement, number, or shape of the tentacles; 

 they even agree with that group in the habit of incrnsting the derm 

 Avith small foreign bodies. Hence it would be (juite proper to ]>lace 

 Gerardiu Lamarrll, Lacaze-Duthicis. the onl\- s[)ecies known, among 

 the Zoanthida^. as ty]ie of a subfamih. 



'i'he subdivision of the Anti])athida> into genera by lUainville. (Jray, 

 and Miliie-Kdwards is leased entirely on the solid parts. The few 

 species ol' which 1 have had the opportunity of examining the polyps, 

 all belong to the genus Antipathes proper, according to the charac- 

 teristics heretofore adopted. It has seemed to me, however, that two 

 distinct types of polyps could be distinguished, the one well circum- 



