1898] La.mbe — Canadian' Palaeozoic Corals. 253 



" Polypier cylindro-conique, tres-long-, a bourrelets d'accrois- 

 sement larges et peu saillants ; fossette septale proportionnelle- 

 ment un peu petite, situ^e tres-pres dc la muraille ; au moins 70 

 cloisons egales, minces, arrivant sur la partie superieure dcs 

 planchcrs jusqu' a une petite distance du centre, ou elles sont 

 l^gerement flexueuses ; un egal nombrc de cloisons rudimen- 

 taires ; planchers tres-grands, envahissant les loges intercloison- 

 naires, ou Ton ne voit pas de traverses vesiculeuses independantes, 

 et lisses en dessous dans une grandc etendue. La longueur est 

 frequemmeni de 40 a 50 centimetres ou mc-me plus, le diametre 

 du calice de 7 ou 8" (Milne-Edwards and Haime). 



The description given by Rominger of this species is a 

 thorough and accurate one and makes allowance for the varia- 

 tions that exist in this species in common with most other species; 

 it appears in the following words : — " Conico-cylindrical, horn- 

 shaped polyparia, attaining in some specimens a size of two and 

 a half feet in length, by a diameter of three inches. Some enlarge 

 their diameter rapidly to a certain thickness, and then grow on 

 in a uniformly cylindrical shape ; others are in the young state, 

 slender, flexuose, and irregularly constricted stems, and grow 

 gradually to larger diameters. The surface of the polyparia is 

 covered by an epitheca with shallow annular wrinkles of growth 

 and longitudinally ribbed by septal striae, which, however, are 

 not in all specimens equally distinct. Calyces spacious, with 

 erect walls, and acute, wedge-like margins ; bottom broad, mar- 

 ginally depressed and flat in the centre. In one place of the 

 circumference the diaphragms are more deeply depressed by a 

 septal fovea. Radial lamellae stout, linear, alternately long and 

 short, but appearing nearly equal on the margins of the calyces, 

 where the sharp crested leaves of the inside expand into low 

 rounded rugae. The extension of the radial crests toward the 

 centre is subject to variations ; in some the central part of the 

 diaphragms remains smooth, and the crests are confined to their 

 peripheral circumference ; in others the crests reach as low 

 carinae to the centre and become irregularly entangled in their 

 convergence, but thc5e-e«vt4:^portions of the crests are merely 



