172 ZOOPHYTES. 



Lapis corallites, &c., Seba, iii. tab. 112, its gyri with the above, and is similar in 

 fig. 2. This figure agrees in the size of its stout lamellae. 



3. CTENOPHYLLIA PACHYPHYLLA. (Ehrenberg.} Dana. 



C. collibus integris, Gothicis, rarn obsolete: sukatis, 5-6'" latis; gyris 

 5-8'" latis ; lamellis crassis ; septo raw. 



Corallum with the ridges entire, Gothic, rarely obsoletely sulcate, 5 to 

 6 lines wide; gyri 5 to 8 lines broad; lamellae stout; septum thin. 



Plate 14, fig. 15, outline of lamellae and trench. 



The ridges are as broad as in the pectinata, but they are not sul- 

 cate. The lamellaB are about seven in number to half an inch of the 

 fossa, and occasionally there is a small intermediate one ; those of ad- 

 joining furrows seldom meet at the top of the septum, but pass one 

 another, and in some instances there is an incipient sulcus. The 

 lateral surfaces of the lamellae are granulous. 



Lapis corallites, &c., Seba, iii. tab. 112, it as having the gyri eight lines broad, 



fig. 3, represents a worn specimen ; it and " lamellis crassis, latissimis, collium 



agrees in the breadth of the gyri, stout pariete interno membranaceo." Seba's 



lamellae, and other characters. figure 2, tab. 112, to which he refers, 



Manicina pachyphylla, Ehrenberg, G. Ixiii. has much narrower gyri than stated in 



sp. 5. This species is apparently iden- the description, and appears to represent 



tical with the above. Ehrenberg describes the quadrata. 



4. CTENOPHYLLIA PROFUNDA. (Dana.} 



Corallum collibus integris, Gothicis, angustis (4'" latis), gyris 5-6'" 

 latis, fossis prof undissimis (fere "), lamellis rarioribus. 



Corallum with the ridges entire, Gothic, narrow (4 lines wide), gyri 

 5 to 6 lines broad, fosses very deep (nearly an inch), lamellae 

 rather thin. 



Plate 14, fig. 16, outline of lamellae and trench. 



Like the pachyphylla, this species has entire ridges, but they are 

 much narrower, and the fossae much deeper. Moreover the under 



