304 ZOOPHYTES. 



Red Sea. Ehrenberg. 



This species differs decidedly from the preceding in its sharper, 

 more incised, and irregular dentation. The intervals between the 

 teeth are usually very sharp and narrow; the teeth are often subacute 

 and mostly about a line long (Plate 19, fig. 14). A specimen in the 

 collections of the Academy of Natural Sciences, of Philadelphia, 

 measures nearly fourteen inches in length, by four and a half in 

 breadth. The oririme is subdivided once towards one side. 



Haliglossa echinata, Ehrenberg, G. xv., Fungus marinus, Seba, iii., pi. Ill, fig. 4 ; 

 sp. 1. " lamellis subtiliter denticulatis." (?) 



20. FUNGIA RUPPELLII. (Leuckart.) Dana. 



F. grandis, elongata, latitudine duplo longior, convexa, subtus concava. 

 Corallum lamellis incequalibus, denticulatis, utrinque asperis; denti- 

 culis incequalibus s&pius laceris, interdum subtruncatis, oririma ad. 

 utrumque finem fere producta, indivisa: subtus echinatum. 



Large, much elongate, twice as long as broad, convex, below concave. 

 Corallum with unequal lamellae, rough on both surfaces; denticulate, 

 denticles unequal, usually lacerate, sometimes subtruncate; oririme 

 continued nearly to each margin, undivided : below, echinate. 



Indian Ocean. Leuckart. 



The delicately lacerato-denticulate lamell* separate this species 

 from the others described. One of Leuckart's specimens measured 

 four and a half inches in length and two and a quarter inches broad. 



Herpetolilhus Riippellii, Leuckart, op. cit., 54, tab. 1. 



The Fungia echinata, figured in the Reg. Anim., 1837, pi. 82, fig. 2, has the fine 

 denticulation of the Riippellii, but it is represented as crenato-denticulate. Its length is 

 a little more than twice its breadth. 



21. FUNGIA CRASSA. (Dana.) 



F. grandis, elongata, latitudine duplo longior, valde convexa et latere com- 

 pressa, subtus profunde concava. Corallum crassimum, lamellis crasse 

 dentatis, non granulosis, dentibus rotundatis, scepe l-2"' lads, ori- 

 rima 4-5-partitd : subtus superf.de confertissime echinata. 



