192 ZOOPHYTES. 



tive characters can be laid down. The following may be varieties, 

 although presenting some striking peculiarities of habit. 



P- angusta. Semi-globose; gyri very sinuous, half to two-thirds of 

 an inch wide ; ridges throughout stout and sulcate (often one-quarter 

 to one-third of an inch broad), abrupt; fossae one-third of an inch deep, 

 mostly one and a half lines wide, lamellae strongly dilatate at base. 

 The most striking peculiarity is its more massive character, the ridges 

 being in no part simple; the fossae are narrower, much more sinuous 

 than in the areolata. 



7- gracilis. Subturbinate, gyri sparingly sinuous, scarcely exceeding 

 one-third of an inch in breadth ; and ridges mostly simple instead of 

 becoming duplicate by coalescence, one to one and a half lines thick; 

 fossae one to one and a half lines wide and dilating at the extremities 

 of the folds. The specimens are often a simple sinuous calicle, with 

 the folds seldom coalescing laterally. In this non-coalescent character, 

 and the narrower gyri, it appears to differ from the areolata of Ellis. 



Madrepora areola, Linn., ed. xii., p. 1274, , Blainville, Man. 357. 



and Pallas's Zooph. 295. Mceandra areola, Oken, Zool. i. 70. 

 , Esper. i. 84, tab. 5. Indifferent Manicina areolata, Ehrenberg, G. Ixiii. sp. 



figures of worn specimens. 11. 



Madrepora areolata, Ellis and Solander, , Leuckart de Zoophytis coralliis, et 



161, tab. 47, fig. 5. A good figure. speciatim de genere Fungia, 4to. Friburg, 



Figure 4, of the same plate, is usually 1841, pi. iii. fig. 3. 



referred to as the same species; but it Seba's figure?, tab. Ill, usually referred to 



appears to be quite distinct. this, is another species without sulcate 



Meandrina areolata, Lamarck, 2d ed. ii. ridges, and appears to be the prcerupta. 



388, No. 5. Lesueur's figure of the M. areolata, Mem. 

 , Lamour., Exp. Meth. 55, tab. 47, du Museum, vi. tab. 16, fig. 11, may be 



fig. 5 ; Encyc. 508. this species, yet it is doubtful. 



NOTE. The figures 23 to 27, tab. 112, of Seba's Thes. iii., " fungi marini, oblongi, 

 parietibus crassis, erectis compressis, &c.," represent worn specimens of perhaps more 

 than one species of this genus, including the areolata. Ehrenberg has instituted the spe- 

 cies Manicina Manica for specimens resembling Seba's, which he thus characterizes. 

 " Bipollicaris, pollicem alta, turbinato-calycularis, supra plana, margine gyrosfe plicato, 

 meandrica, collibus prseruptis, lamellis angustissimis, denticulatis, arenosis, sulcis latissi- 

 mis, pallii margine tenui, diaphano, pedicello acuto." (G. Ixiii. sp. 10.) The turbinate 

 form is probably a young state of all the species. 



