Frof. H. A. Nicholson — Neiv Devonian Fossils. 55 



oblique to the surface, opening by calices which are arranged in 

 irregular diagonal lines, and which have a circular, or transversely- 

 oval, hardly sub-triangular shape. Calices oblique and excessively 

 crowded, about one-sixth to one-eighth of a line in their longest 

 diameter, and separated by intervals of from one-fifth to one-fourth of 

 a line transversely, or the same distance or less measured vertically. 

 There are thus from three to four calices, and from two to three 

 interspaces in the space of one line, measured either diagonally across 

 a branch or vertically. 



Alveolites conferta (Fig. 5, c) is allied to the forms described by 

 Mr. Billings under the names of A. lahiosa and A. cryptodens, and 

 especially to the former; but it appears to be decidedly distinct from 

 these or from any other previously recorded forms. It is distin- 

 guished by the very minute and close-set corallites, and by the fact 

 that the calices are as a rule not distinctly sub-triangular, and have 

 not a markedly prominent lower lip. No calicine teeth are present. 

 In some respects A. conferta has the aspect of a Ccenites, especially 

 in the fact that the corallites at first sight appear to be surrounded by 

 a more or less copious coenenchyma. This appearance, however, is 

 deceptive; and 1 have no doubt as to the correct reference of the 

 species to Alveolites. 



Locality and Formation. — Eare in the Corniferous Limestone of 

 Port Colborne and Eidgeway. 



Alveolites kamulosa, Nicholson. PI. IV. Fig. 6, a, b. 



Spec. char. — Corallum reticulated, composed of flattened sub- 

 cylindrical or cylindrical stems, from two-thirds of a line to two 

 lines in diameter, commonly one line, branching with great frequency 

 and interlacing to form a close network, the meshes of which vary 

 from one to two lines in diameter. Corallites very minute, about 

 th*ee in the space of one line measured diagonally, about one-sixth 

 to one-eighth of a line in their longest diameter, separated by inter- 

 vals of rather more than one-third of a line. Calices apparently 

 transversely oval, or sub-triangular when perfect, but commonly dis- 

 tinctly triangular; lower lip sharp. 



This species represents in the genus Alveolites the anastomosing 

 F. reticulata in the genus Favosites. It presents also a close resem- 

 blance in its external appearance to the Cladopora reticulata of Hall, 

 from the Niagara group, from which, however, its structure sepa- 

 rates it widely. It is distinguished from Alveolites labiosa, Billings, 

 to which it is structurally most closely allied, not only by the re- 

 ticulated form of the corallum, but also by the much more minute 

 calices. It differs from A. conferta, Nich., again, in forming a net- 

 work, in the corallites being much more remotely placed, and in the 

 fact that the calices are generally distinctly sub-triangular or even 

 triangular. 



Locality and Formation. — Not uncommon in the Corniferous Lime- 

 stone of Port Colborne and Lot 6, Con. 1, Wainfleet. 

 Alveolites Billingsi, Nicholson. 



Spec. char. — Corallum reticulated, composed of cylindrical or sub- 

 cylindrical stems from "two to three lines in diameter, which branch 



