170 ZOOPHYTES. 



Animals explanato-glomerate ; disks seriately budding, and hence 

 linear and sinuous. Coralla substipitate, convex ; cells trench- 

 like and meandering ; lamellae very stout, few, subequal, entire or 

 nearly so. 



The Ctenophylliae have long meandering cells like the Meandrinae, 

 but are stipitate species, peculiar in their stout, remote, entire lamellae. 

 The under surface of the corallum is crimpled and striate, especially 

 near the margin, where the living animal extended : where dead, the 

 striae are often obsolete and the surface is more or less incrusted with 

 other corals. The species have some resemblance to the Manicinse, 

 but they differ decidedly in general habit ; the lamellae of the latter 

 being thin, evenly crowded, and regularly denticulate. Moreover, 

 the septum between adjacent cells in the Ctenophylliae is thin, and 

 nearly solid. 



The name of this genus is derived from xras, a comb, referring to 

 the appearance of the lamellae along the septum, to which allusion is ' 

 made in Lamarck's name, M. pectinata. 



This group appears to be related to the Euphyllise, and has been 

 placed in the same subfamily with them ; yet, as the animals have 

 not been examined, some other arrangement may hereafter be re- 

 quired. The type of the genus is the Meandrina pectinata of La- 

 marck. Ehrenberg, in view of the substipitate character of the 

 species, places them in his genus Manicina. The species appear to 

 be confined to the West Indies. 



Arrangement of the Species. 



1. Ridges sidcate. 



*1. C. pectinata. *2. C. quadrata. 



2. Ridges entire. 



*3. C. pachyphylla. *4. C. profunda. 



1. CTENOPHYLLIA PECTINATA. (Lamarck.) Dana. 



Corallum collibus sukatis, 5-6'" latis, gyris sinuosis 6-7'" latis, lamettis 

 rotundatis, fossis 3-4'" proj undis ; super fide inferior e levi sed prope 

 marginem (ad \"} rugata et remote striatd. 



