On the Genus Cladochonus. 293 



Cladochonus bacillarius, M'Coy ? 



Jania bacillaria, M'Coy, Synop. Carb. Limestone Foss. Ireland, 1844, p. 197, 

 t. 26, f. 11. 



„ bacularia, M'Coy, Annals Nat. Hist. 1847, vol. xx. p. 227. 

 Cladochonus bacularius, M'Coy, Annals Nat. Hist. 1849, vol. iii. p. 134. 



„ bacillarius, M'Coy, Brit. Pal. Foss. 1851, fasc. i. p. 84. 



Jeunes Syringopores, Edwards and Haime, Polyp. Foss. Terr. Pal. 1851, p. 296. 

 Young Syringoporm, Edwards and Haime, Mon. Brit. Foss. Corals, 1852, pt. 3, 



p. 164. 

 Cladochonus bacillaris, Morris, Cat. Brit. Foss. 1854, 2nd ed. p. 49. 

 Jeunes Syringopores, Milne Edwards, Hist. Nat. Corall. 1860, vol. iii. p. 298. 



Observations. — The forms we refer to this species from the Scotch 

 Carboniferous Series we have only seen in fragments, and would 

 therefore simply make the reference provisionally. The chief points 

 of specific importance appear to he slender, straight, cylindrical 

 branches, with the short conical cups at the summits, if these points 

 can be accepted as a means of separation when no differences can 

 be detected in their internal structure. We fail to see how the two 

 so-called species, the present and C. Michelini, can be kept apart, as 

 they appear to be clearly different stages of growth, or varieties of 

 a single species. Tbey do not differ in their microscopic structure, 

 and nothing but perfectly trivial external differences exist. 



Loc. and Horizon. — Charleston, Fife — Lower Carboniferous Lime- 

 stone Series — Coll. Geological Survey of Scotland. 



Collector. — Mr. James Bennie. 



Genus Monilopora, Nich. and Eth., jun., (gen. nov.) 



Monilopora (Cladochonus) crassa, M'Coy, sp. 



Jania crassa, M'Coy, Synop. Carb. Limestone Foss. Ireland, 1844, p. 197. 



„ „ M'Coy, Annals Nat. Hist. 1847, vol. xx. p. 227. 



Cladochonus crassus, M'Coy, „ 1849, vol. iii. p. 134. 



,, ,, „ Brit. Pal. Foss. 1851, fasc. i. p. 85. 



Jeunes Syringopores ? Edwards and Haime, Polyp. Foss. Terr. Pal. 1851, p. 296. 

 Young Syringopores ? Edwards and Haime, Mon. Brit. Foss. Corals, 1852, pt. 3, 



p. 164. 

 Cladochonus crassus, Morris, Cat. Brit. Foss. 1854, 2nd ed. p. 49. 

 Jeunes Syringopores, Milne Edwards, Hist. Nat. Corall. 1860, vol. iii. p. 298. 

 Cladochonus crassus, Kofe, Gteol. Mag. 1869, Vol. VI. p. 352, Figs. 2, 3, 4 and ia. 



Observations. — Monilopora crassa, M'Coy, sp., may be dis- 

 tinguished from the other corals with which it has been usually 

 associated by its large size, and by its thick, conical, short branches. 

 Prof. M'Coy states that " the mode of attachment of the young is 

 most usually by the early branches growing in a circle round a 

 crinoidal stem," and a figure of this was given in his eaidy work. 

 There is, however, more than mere attachment when young, because 

 the coral goes on growing and growing, until at last what with the 

 increase of the parasite, and the deposition of matter by the crinoid 

 about that portion of its stem infested by the coral, an excrescence of 

 no small size is formed. The habit thus possessed by M. crassa has 

 been referred to more in detail by the late Mr. Eofe, who has pub- 

 lished figures illustrating the manner in which the coral attached 



