86 A. E. Verrill — Bermudinn and West Indian Reef Corals. 



The principal distinctions between areolata and Colpophyllia is 

 the presence of well defined calicinal centers and radial septa in the 

 latter, while in the former they are indistinct, as in Mmandra ; and 

 the absence of a columella in Colpo^yhyllia. 



Callogyra V., gen. nov. 



Coral pedicelled ; calicles large and with very distinct centers in 

 deep valleys, mostly united in short series. Collines large, with 

 simple or double walls united by exotheca. Septa with paliform 

 lobes ; edges finely serrulate. Columella trabecular. Outer surface 

 naked, covered with spinidose costoe. Endotheca not abundant, deep 

 within the interseptal spaces. 



Tl)is genus is like a TrachyphylUa with coalesced walls, and might, 

 indeed, be considered a section of that genus if intermediate condi- 

 tions were known. It bears about the same relations to that genus 

 that Sy^njihyllla does to Mussa, or Plerogyra to Eaphyllia. 



In form, the type resembles the Manicina areolata, of authors, but 

 differs widely from it in its large, distinct calicles, and finely and 

 evenly serrulate septa. It also has a general resemblance to Mean- 

 drina [Pectiuia) Braziliensis, but the latter has entire septa and the 

 calicinal centers are not distinct. 



It is also nearly allied to Manicina, emended = Colpop)hyllia E. 

 and H., but the latter forms more massive and cellular corals, with- 

 out a columella, and has different exterior costae, and less distinct 

 calicles. 



Callogyra formosa V., sp. nov. 



Plate XXIV. Figures 1, 2. 



The coral is narrowly pedicelled, glomerate, elliptical, with lobed 

 margins and with high radial collines, more or less forked and 

 curved, much as in IsophyUim and young Mmandrm. Between the 

 collines are large marginal calicles, which render the mai'gin lobu- 

 late ; two large calicles occupy the central valley. The valleys are 

 deep and rather wide, the central ones with i^erpendicular walls. 

 The calicinal centers are very distinct and occupied by a loose trabec- 

 ular columella. The collines are simple in some places, with a thin 

 wall, but in most places they are double with two thin walls near 

 together ; their summits are obtusely rounded. 



The septa ai'e thin with wide interspaces ; their breadth is moder- 

 ate; lengths very different, corresponding to the five cycles to which 



