208 ZOOPHYTES. 



West Indies. 



The argus is a neat species, distinguished by its low conical ca- 

 licles, rather less than half an inch across, finely striate, with forty- 

 eight minutely denticulate lamello-striaB, when of adult size ; the cells 

 are nearly circular, and a fourth of an inch broad ; the lamellae are 

 thin and about ten of them extend to the fundus, which is about one- 

 third the breadth of the star. The septa present only occasional cel- 

 lules, either in a vertical or transverse view. In a vertical section, the 

 dissepiments on the surface of the lamella? are seen to be numerous, 

 quite fine, and nearly horizontal, a little oblique downward. 



Mad. cavernosa, Esper, Fortsetz. i. 18, tab. Aslrea argus, Lamour., Encyc., 131. 



37. A. Tubastrcea cavernosa, Blainville, Man., 



Astrea argus, Lamarck, ii. 404, No. 2. 368. 



3. A. ORBICELLA G-LAUCOPIS. (Dana.) 



A. maxima, hemispherica ; poli/pis prominulis ; lamellis 48. Corallum 

 subcettulosum : transverse secto, stellis suborbiculatis, 4-5'" latis, ten- 

 uiter 24:26-radiatis, cellulis simplicibus ; septis subcellulosis, cettulis 

 lineatis et > -formibus, numerosis. 



Very large, hemispherical ; polyps a little prominent, with 48 la- 

 mellse. Corallum subcellular : stars in a transverse section, subor- 

 biculate, 4 to 5 lines broad, finely 24 to 26-rayed, with the cellules 

 simple ; septa subcellular ; the cellules linear and > - shape, nume- 

 rous. 



Plate 10, figure 2 a, a vertical section; 2b, transverse section; both 

 natural size. 



The Feejee Islands. Exp. Exp. 



This coral, of which the author has seen only a worn speci- 

 men, grows in large hemispheres. The specimen measures fifteen 

 inches in length, and is but a section of a larger mass, which, from 

 the angle of divergence between the sides, must have been at least 

 three feet in diameter. There is some resemblance in a transverse sec- 

 tional view to the argus, but the stars are much larger, with a greater 

 number of rays, and the septa have more numerous cellules, the la- 



