WORMS. ZOOPHYTA. 90. Madrepora. 617 



Inhabits the Indian and Red Seas : fometimes with, fometimes 

 without foot-ftalk j 1—6 inches in diameter : white, with a 

 concave centre and rough beneath: gills acute, alternately 

 fhorter and irregularly ferrate. 



ulla. Without, item: gills granulate at the fides, denticulate at 

 the margin and placed in a triple order, the third 

 reaching from the centre to the margin. 

 Soland. and Ellis Cor all. p. 1481 «. I . tab. 28. f. 1—4* 

 Inhabits the Mediterranean ; if inch diameter. 

 All the gills denticulate at the margin and very rough at the fides ; 

 the younger fpecimens flat, the adult ones convex. 



itbus. Clavate, turbinate with a tapering bafe : ftar obconic with 

 a doubled prominent jagged centre. 



Soland. and Eltts Cor all. p. 150, n. 3. tab. 28 fig. J. 



Plane, conch, ed. 2. p. 1 28. tab. afp. 18. fig. M. 



Inhabits Southern coafts of Europe ; about 2 inches long and f 

 diameter: white and very hard : gills about 40, with as many 

 intermediate fmaller ones, the latter reaching to the margin, 

 but not extending to the centre like the larger ones. 



B. IVith numerous feparate jlars, and continued gills. 



nis t Without ftem, oblong, convex, beneath concave; with 

 longitudinal rows of concatenate (tars : gills crowded, 

 abbreviated, 



Soland. and Ellis Coralh p. 1 59. tab. 45. % 



Rumpf. Amb. 6. p. 248. tab. 88. fig. 2, 3. 



Seba Muf. 3. tab. III. fig. 3. 5. 

 2. Seba Muf. 3- tab. 1 1 1, fig. 6. tab. I iz~f- 31. 



Inhabits the Indian Ocean. In the furrow along the middle is a 

 line offtars with their gills difpofed each fide in a radiate, form j 

 under thefe each ddc are 2 other rows of liars, as it were linked 

 together, with their rays nearly parallel and pointing upwards' 

 and downwards : margin all round terminated by fharp erect 

 laminse or gills. 



(lata. Foliaceous, erefted, with rows of ftars impreiTed an the 

 centre; the foliations broad and flattifh. 

 Soland. and Ellis Cor all. p. 158. n. 27. tab. ^*f> 3> 4. 

 Inhabits the Indian and South Seas. 



^uca. Sefhle, with large crowded frondefcent (tars, the fronds 

 perpendicular, waved and jagged. 

 Soland. and Elks Cor all. p. I 58. n. 28. tab. 44 * 

 Seba Muf. 3. tab, 89. fig. 10. 

 Inhabits the American Ocean? very rare. 



VOL.' IV.— 4 I Fictides* 



