514 Verrill, JSFotes on Radlata. 



Oculinidm. Coral lum encrusting or branched, with compact 

 coenenchyma, smooth, or slightly costate near the cells. Cells 

 of moderate size or large, more or less filled up below. Septa 12 

 to 48 or more, in sevei-al unequal cycles, the edge of the principal 

 ones entire. 



Pocilliporidce. Corallum branched or lobed, with the coenenchyma 

 compact at surface and mostly spinulose. Cells small, divided 

 by transverse septa below, partially filled up. Septa 12 to 24 

 (rarely 36), often rudimentary, especially in young cells. 



Stylophoridce. Corallum massive, encrusting, or branched, with the 

 coenenchyma compact near surface and mostly spinulose. Cells 

 small, not filled up, or but slightly so, with few irregular, trans- 

 verse interseptal divisions. Sej)ta 10 or 12 to 24. 



? Stylmid(e. Corallum massive, astroeiform. Cells of moderate 

 size or small. Septa with entire edges. 



Astrangidm. Corallum solitary, or crespitose, encrusting, or lobed, 

 with little or no coenenchyma ; buds basal, or arising from 

 stolons, or lateral. Cells of moderate size, not filled up below, 

 with few, distant, irregular, transverse divisions. Septa numerous, 

 in several unequal cycles, those of the first and second usually 

 with entire edges. Includes Astranginm and Cladocorince. 



Caryophyllidm. Corallum solitary, attached or free when adult. 

 Cells often large, increasing upward, open from the base. Septa 

 numerous, in several unequal cycles, their edges entire. 



On the west coast of America representative of but four of these 

 families are known : Stylasteridm, Pocilliporidce, Astrangidce, and 

 Caryophyllidie. 



The Oculinidce are abundant in the Atlantic, Mediterranean, and 

 Indo-Pacific faunae. The Styloplioridm are most abundant in the 

 Indo-Pacific, but have a few representatives in the Caribbean fauna. 

 The Stylinidce are mostly fossils of the Cretaceous and Tertiary forma- 

 tions of Europe, but a few species still live in the Atlantic. 



Family, Stylasteeid^ Pourtales. 



Stylasteracea (subfamily of Oculinidce) Edw. and Haime, Corall., ii, p. 126, ISST. 

 Stylasteridce Pourtales, Bulletin Mus. Comp. Zool., No. "7, p. 125, 18fi8. 



The corals included in this family most frequently form delicate, 

 arborescently branched corals, often flabelliform, and sometimes with 

 coalescent branches, in other species the coral is irregularly lobed or 

 encrusting. The coenenchyma is abundant and very compact, with a 

 smoothish or finely granulous surface, often with peculiar swellings or 



