314 ZOOPHYTES. 



half an inch apart, and the lamellae of the stars are often obliquely 

 stellate, and quite thin at the edge towards the oririme. Ehrenberg 

 mentions a specimen a foot and a half long. This species is peculiar 

 in its thickness and distinct oririmes, and often substellate lamellae. 



Fungus marinus oblongus, lamettis mini- Fungia talpa, Oken, Zool. 74. 



mis, squameis, subtiliter denticulatis, Herpolitha talpa, Eschscholtz, Oken's Isis 



erectis, in media dorso stellalis ; cui no- for 1825. 



men est Talpa marina : ad oras Am- Polyphyllia talpa, Blainv., Man. 339. 



boynte, Seba, Thes. iii. fig. 6, tab. Ill ; a , Ehrenberg, G. xvi. sp. 1. 



good figure. Agaricia talpa, Schweig., Handb. 415. 

 Fungia talpa, Lamk., ii. 373, No. 8. 



2. POLYPHYLLIA LEPTOPHYLLA. (Ehrenberg.} 



P. angusto-obhnga, convexa et subtus concava, extremitatibus rotundata. 

 Corallum %" crassum ; oririmis apertioribus, profundis, substellatis, 

 mediants seriatis ; lamellis brevioribus (l-2'"), prominentioribus 

 tenuissime denticulatis, et fragilibus, marginalibus 2-3'" longis. 



Narrow oblong, above convex, and below concave, extremities rounded. 

 Corallum \ of an inch thick, oririmes very distinct and deep, often 

 substellate, the medial seriate; lamellse quite short (IJ to 2 lines), 

 much prominent, very slenderly denticulate and fragile, the mar- 

 ginal, 2 to 3 lines long. 



Plate 20, fig. 6 a, form of the corallum ; 6 b, c, outline of lamellae. 



With the general shape and thickness of the talpa, this species has 

 smaller and more exsert lamellae, very slenderly denticulate, and those 

 of the margin are also very much shorter. A specimen in the collec- 

 tions -of the Boston Natural History Society, is eleven and a half 

 inches long, nearly four inches broad, and two in height. The lamellae 

 are very fragile, and project two and a half or nearly three lines above 

 the bottom of the oririmes. 



Polyphyllia leptophylla, Ehrenberg, G. xvi. sp. 2. 



3. POLYPHYLLIA SIGMOIDES. (Ehrenberg.} 

 P. angusto-oblonga, kviter sigmoides, utrinque attenuata. Corallum 



