WORMS, ZOOPHYTA. 91, Millepora. 639 



cinereous, but feldom white : fometimes it is fhaped like the 

 kernel of a walnut, often in large compreffed maiTes, fome- 

 times like a fmall bunch of grapes, bnt moll frequently in fhort 

 irregular ramifications of a chalky tuberculate appearance and 

 ftony fubflance. 



Decuffata, Compofed of cretaceous erect laminae or plates eroding one 

 another and uniting differently here and there. 

 Sol and. and Ellis Cor all. p. \ % I. n. 3, tab. 23. /* 9, 

 Inhabits the coaft of Portugal, in malies of 5 or 6 inches wide. 

 1 

 *Alga\ Confifting of thin femicircular plates difpofed horizontally, 

 Solander and Ellis Corall. p. 1 3 1 . n. 4. tab* 23. /I IO — 1 2* 

 Inhabits the Comijh coaft, adhering to and covering the M, poly- 

 morpha, and is either red, purpliOi, yellow or whitifh : ex- 

 tremely thin and brittle, with femicircular plates of various 

 lizes conftantly growing horizontally with their margins bend- 

 ing over, making them convex on the upper fide and concave 

 beneath, 



*?umicofa< Irregularly lhaped, brittle, rough, and compofed of fharp- 

 pointed roundiih cells. 



Ellis, Corall* p. 75. w. 7. tab.2J. fig*H?. f. 



Solander and Ellis Corall. p. 1 3 5 . n. 1 o. 



Inhabits the Britifi coafts, and is often found incruftirig many of 

 the Sertulariae, in fmall irregular mafies, appearing like white 

 fand ftrongly united together : branches generally cylindrical^ 

 each about half an inch long : cells placed round about in al- 

 ternate order, fhaped like an helmet juit opening, with a hole 

 in the middle ; probably a Madrepore. 



^uhulofa. Farafitic, cruftaceous, pale purple* with fmall tubular cells 

 difpofed in tranfverfe rows or whorls. 



Ellis CoralL p. 74. n. 6. tab. zy. fig. E.e. 



Solander and Elks Corall. p.1%6, n. 11. 



Inhabits the Mediterranean and BritiJIi coafts, and is found fre- 

 quently encompaiTing the Hem of the Sertularia falcata : tubes 

 erect, or declining. 



Pinnata. Dichotomous, ereel:, with tubular pores difpofed in a pin- 

 nate order. 

 Marf Hijl. Mar. p. 152. /.31./. 167. n* 1. 3.4. & 2, 3. 5./M53. 



t. 34./*. 168, n. 1 — 3. 

 Inhabits the Mediterranean ; greyiih when recent, fometimes 

 green, about an inch high, and very brittle, 



•tiUacea* Creeping proftrate, in obtu'fe linear divffions, with tubular 

 pores on the upper furface difpofed in tranfverfe rows. 



Playic* 



