III. DIST. CHAR. Prototype. 131 



The reader will note, that in the foregoing list 

 of terms (a. 65. g. 97.) we have marked 



line, in diameter Very minute t less than one fourth of a line 



in diameter. 

 e.)Qpen(apertum) not furnished with an operculum or lid. 



Operculate (operculatum) having an operculum. Millepora 



truncata, T. 23. f. 18. Ellis. 

 /.)Wide (patulum) its diameter exceeding that of the lower part 



of the cell. Madrepora Cyathus, T. 28. f. 7. Ellis. 

 Spreading (patens) wide, with the margin expanded. Madre- 



pora Patella, T. 23. f. 1- 3. Ellis. 

 Contracted (coarctatum) less than the general concavity of the 



cell. Sertularia quadridentata, T. 5. f. g. Ellis. 

 ^.)Marginate (marginatum) with a regularly defined margin. 



Sertularia Pennatula, T. 7. f. 1. 2. Ellis. 

 Irnmarginate (immarginatum) without any regular or definable 



margin. Madrepora galexea, T. 47^ f. 7 Ellis. 

 A.JRadiated (radiatum) divided by radiating lamella, v. Lamellae. 



Madrepora. 



Reticulated (reticulatum) having both the radiating and circu- 

 lar lamellae visible. Madrepora cespitosa, n. 6Y. Gmel. 



Linn. Syst. Nat. 

 Helmeted (galeatum) surmounted by a concave or helmet-like 



process. Cellaria (Sertularia. Linn.) avicularia, p. 22. n. 5. 



Ellis. 

 Tubulous (tubulosum) projecting from the cell in a tubular form. 



Flustra tubulosa, p. 17. n. 11. Ellis. 

 &c. &c. 



t.) Terminal (terminale) at the end or top of the receptacle. 

 Lateral (laterale) on one side of the receptacle. Sertularia 



anguina, n. 42. Linn. Gmel. Syst. Nat. The aperture or 



mouth is usually terminal; but, in some few instances, is 



placed as in the species referred to. 



