J. III. DIST. CHAR. Prototype. 109 



85. Caudical (caudicale) having the form of 

 a caudex or the trunk of a tree. The caudex 



Septum (septum} Ellis and Solander have called this the dissepi- 

 ment ; a term used by later authors to express a very different 

 and distinct part in cellular corals. Vide dissepiments. 

 DISSEPIMENTS (Dissepiment a) transverse plate-like parts .by 

 which the perpendicular stirplets, in Tulipora musica, Ma- 

 drepora musicalis, &c. are united. 



VESICLES (Vesiculie) little bladder-like bodies externally attached 

 to various parts of the stirp in the genus Sertularia. They 

 have always a regular, determinate shape, distinct from that 

 of the denticles. When they take an hemispherical form, 

 they are denominated buUulce ; as in the Ctllarite of Ellis. 

 The mouth (osculum) of the vesicle is its aperture 

 The base (basis} the part by which it is affixed to the stirp. 

 In some species, the vesicles appear to be ovaries, and contain 

 eggs only. It may be doubtful, therefore, whether they 

 ought to be considered as a part of the fulciment. In many in- 

 stances, however, they seem to be such merely covering hydra 

 of a larger size than those in the denticles ; and from which pro- 

 ceed clusters of eggs, or young ones perfectly formed and living 

 Vide Eilis's " English Corallines." 



The vesicles, as well as the denticles and calycles, from their 

 minuteness, can rarely be objects of investigation in the fossil state. 



SECONDARY TERMS. 

 The FULCIMENT (Fulcimentum) 



0.)Pn>per, or simple (proprium s. simplex) formed by, and sup- 

 porting only, a single zoophyte. Madrepora Cyathus, Ellis. 

 T. 28. f. 7. 



Common, or compoun<\(com?mine s. compositumformed by, and 

 supporting several distinct individuals of the same species of 

 zoophyte, Madrepora facosa, Ellis. T. 50, f. 1. &c. &c. 



