NO. 1401. GENERA OF SIMPLE FUNGID CORALS— VAUGHAN. 405 



4. CycloUteit cri'^Udti Laniarck. 



However, they are first described in 1816." 



Of these species Mihie P]dwards and Haime h^ft (J. niitnisviallH^ 

 C Jiciiusjjhserica^ and C. dlijdlea in the o-enus (Ji/clolites, referring- 

 C. hehiisphderica to the synonymy of G. eUijdicaJ' 



The fonrth species, C. crista fa., belongs to an entirely different 

 genus, A.sjjiducus Koenig-,^ 1825. Therefore the type-species must he 

 (J. nuniiKinnlls or 61 elliptica. Milne P]d wards and Ilainie in 1849 '^ 

 selected the latter. 



Distrihutlon. — Upper Cretaceous, Senonian of Europe. 



Renia7'hs. — Pratz in his Verwandschaftliche Beziehungen einiger 

 Korallengattungen describes in detail the septal structure of a coral 

 said to be a (hjcloUte-s, but unfortunately does not gi\'e the name of 

 the species nor does he give any clew by which it can be determined. 

 I broke a specimen of 0. eUipflat, from Gosau, identified l)y Prof. J. 

 Felix, and find that the septal structure, so far as can be distinguished 

 by means of a hand lens, agrees with Pratz's figure, Plate xiv, fig. 1.*' 

 Therefore I l)elie\ e that the structure given by Pratz for OijcloUtes is 

 correct. 



The septa of CycIoHtis {ellijdica) are composed of quite small trabe- 

 cuhe, that in geneial run at right angles to the free edge of the septum. 

 The trabecuhe show equtilly spaced thickenings, those of neighboring 

 trabeculii; fusing-, leaving regularly arranged pores between them; the 

 septa present a striking-ly regular mesh-work appearance. Apparently 

 very near the base the pores tend to be filled. According to Pratz, 

 the pores may Ite obliterated in the thicker septa. Unfortunately the 

 specimens at my disposition do not permit so thorough a study as I 

 should like to make, but examination of the edges of the thicker septa 

 leads me to believe that this part of the description of Pratz also 

 applies to C. elliptica. 



The basal wall of C. elliptica, is perforate and synapticulate beneath 

 the epitheca. 



According to Pratz,' the genus possesses "ausserordentlich feine 

 und sehr zahlreiche Traversen." 



The following is a synonym of Cyelolltes: 



Episeris de Fromentel, Introd. a TEtude Polyp, foss., 1S58-1861, 

 p. 125. 



Original diacpwxis. — "The fossil to which Mr. Reuss has given the 

 name C'[yclolites] maci'ostoiiia differs from Cyclolites by having a wall 

 at first horizontal, but which later becomes vertical, thus assuming tiie 



« Hist. nat. Anim. sans Vert., II, pp. 233, 234. 

 ''See HiMt. nat. Corall., Ill, pp. 40, 44. 

 '■See idem, II, p. 387. 



<^ Comptes rend. Acad. Paris, XXIX, p. 71. 

 * Palaeontographica, XXIX, pi. xiv. 

 /Idem, XXIX. 



