72 Natural Hiftory 



when it was received, the Infeds were viiible in the Cells, 

 but dead. 



Fig. a^ N^ 3. reprefents the exadl Appearance of it, grow- 

 ing on a fmall Oyfter-fhell. 



Fig. Ay is a Piece of the Surface, magnified to fhew the 

 Entrances of the Cells. 



Fig. 5, is a crofs Sedion, and C, an upright Sedion, to 

 fhew the inward Form and Partitions of the Cells magnified. 



Plate XXX. Fig. hy is a Piece of Italian Coral, fliaped like a Stag's 

 '^" ' Horn, and called by Imperatiis^ Porus c&rvi?ius. It is intro- 

 duced here to fhow, that upon magnifying it in federal 

 Views, the outward and inward Form of the Cells are ex- 

 adly the fame with this before us. 



Plate XXX. Fig. 2), is the magnified Appearance of Fig. d. This 

 ^^g-d.D. £j-^g^yg ^^ fame fhaped Cells furrounding a Fucus \ but thefe 

 are made of fofter Materials. Their Entrances are guarded 

 by Spines ; and their Surfaces are fuller and rounder, than 

 thofe of the ftony Coralline, being of a fpongy Texture. For 

 the ftony ones, from being plump and round, when they were 

 quite frelli from the Sea, funk almoft to a flat Surface, as 

 they became dry. 



Plate XXV. To this I fhall add a Defcription of that beautiful Mille- 

 icig.d.D. ^/j;-^ called, the Retepora efchara marma^ oi hnperatus^ pag. 

 630 : becaufe this has been taken for the Efchara retiformis, 

 o{ Rajff juft defcribed. 



This ii found growino; to Shells and Rocks on the Italian 

 Shore, in irregular leafy Figures, but very often in the Form 

 of a Cup, or Drinking-glafs, irregularly expanded at the 

 Brim. As at Fig. d, in Plate XXV. it is made up of a Com- 

 bination of Infects Cells, the whole Subftance is regularly 



pierced 



