202 HT, A. Nicholson on Cornulites and Tentaculites, 
ArT. XXV.—On the genera Cornulites and Tentaculites, and on 
a new genus Conchicolites; by HENRY ALLEYNE NICHOLSON, 
M.D., D.Se., Professor of Natural History and Botany in 
University College, Toronto. 
I, CornvuLtires AND CONCHICOLITES. 
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unlike that of the Serpulae. The walls are of very considerable 
thickness, and are composed of 
a number of large rounded or 
oval cellular spaces or cavities, 
bounded by thin walls; which 
longitudinal series of imbrica- 
~ 
smaller end directed toward the Upper portion of the tube of Gorm 
mouth of the tube, and fitting — ee Dudley, b. 
into the larger aperture of the Cast of the tube of the same, nat. size. 
ring next it in the series. The 
rings are generally narrower and more crowded together towam 
the fixed end of the tube, and the entire surface of the cast 8 
several inches, and a circumference of about two inches at its 
