BUB-CLASS II 



HEXACORALLA APOE08A ASTRAEIDAE 



r.tniilx I. Stylophoridae. Milm- K.l\vard> ;m.| Maim.-. 



_ 



,sVy/// n-,11 developed, forming // ////-,// 

 eohnneUa ; infir*i-/>fn/ Im-uli riii/if// 



tlin>iiil/t<i,if. .Jurassic to lien-lit. 



Mfili'jtliiH-n, Sehweii,'. (Ki^. 138). 

 Stock branching, in- depiv ed. 

 ma->i\e. .uid tuberous. Caliees small, 

 embedded in abundant, at the surface 

 spinous, eoeneiiehyma. Septa well 

 de\el.,|)ed, niiHlerately numerous ; 

 Columella styliform. Jurassic, Ter- 

 tiary, and Ken'm. 



AnuacU, Iv and IF. Kocene. St>/l"l-lin, K. and H. 



^ Family 5. Astraeidae. Milne- K.I wards and 



< 'orattwn composite, or more rarely simple. Theca formed li/ fn*i<ni of >vy//,// 

 Septa numerous, usually well developed ; visceral eli<niil>/ r partitioned off by 

 moi'e or less abundantly developed dissepiments, more rarely bi/ tabulae. .]/>////'y ///<<///"/< 

 ly budding or fission. Coi'allites of massive colonies usually reaching considerable 

 a If If iidi', n ad united with one another nthi-r <H redly by the walls or l;i ///<////> of septa 

 exothei'ully produced (costal septa}. 



Very abundant from the Trias onwards, and by far the most protean family 

 of all the Hexacoralla. According to the serrated or entire character of tin- 

 free septal edges, Milne-Edwards divides the Astraeidae into two sub-families 

 the J.-ifi-ti.iiiHir and the 



Still':,-! I. 



Vifiiu.-i. ". Cunilluiii, natural si/- 



Jurassic and ('r< 



Sub-Family A. ASTKAKINAK. Milne-Edwards and Hainif. 

 septal edges tootJwd, serrated, / Insular. 



a. Simple i-ornll'i. 



Afontlivaultia, Lamx. (Fig. 139). Cylindrical, conical, turl>inatr, or dis- 

 . and cither acutely pointed, or broadly expanded at the l>a-r. Srpt.-i 



-.nilHii c'iri/'>iiliiill<it<i, L-UIIX 

 ; i':i.-n, C;ilva<!..>. 'Natuni! six.-. 



. .-: 



140. 



:, 'ill in .^umi.sn, Fr-iin. N- 

 St. Dizi.T, Haut-Mariif. Natnra! 



, upper edges serrated. Columella absent; epitheca thick, corrugated, 

 readily becoming detached. Common in Trisissie and Jurassic; somewhat rare 

 in Cretaceous and Tertiary. 



LeptopliyUia, Keuss (Fig. 140). Like the preceding, but without epitheea, 

 and attached by broad base. Jurassic and Cretaceou-. 



