1 6 THE GENUS MONTICULIPORA. 



from ChcEtdes, Fischer. I also came to the conclusion that the 

 American corals usually referred to Stenopora could not be so 

 placed, unless Lonsdale's definition of this genus were extended 

 and modified. Several forms believed to be new were described, 

 of which some are really synonyms of previously recorded 

 species, w^hile one (C delicatulMs) turns out, on microscopic 

 examination, to be a Polyzoon. In the same year I also pub- 

 lished descriptions of three new species of Montictilipora, which 

 I described under the names of C/i^tctes monilifomnis, C. Bai^- 

 randii, and C. quadrangular is (the last possibly a Polyzoon), all 

 from the Devonian rocks of Canada (Geol. Mag., Dec. 2, vol. 

 ii., and Palaeontology of Ontario, pp. 60, 61). 



In the same year Mr R. Etheridge, jun., published (Ann. 

 Nat. Hist., ser. 4, vol. xiii. p. 194, PI. XI. figs. 1-3) some 

 interestinsf observations on the structure and external char- 

 acters of AI. ttimida, Phill, as based upon specimens derived 

 from the Carboniferous rocks of Scotland. 



In 1875, Mr U. P. James, an enthusiastic student of the 



Cincinnati fossils, to whom I am indebted for much friendly 



assistance, published the second edition of his ' Cata- 



loeue of Lower Silurian Fossils of the Cincinnati 



Group,' in which he described four new species of Monticuli- 



pora, under the names of Chcctdcs ? calyciila, C. clavacoideus, 



C. Cincinnatiensis, and C. O" Nealli. All these are excellent 



and interesting species, and will be described in detail in 



the later portion of this work. The last is the same as 



C. sigillarioidcs, Nich., which was published some two or 



three months subsequently to the appearance of Mr James's 



catalogue. 



In the same year, but at a little later date than that of the 

 publication of the preceding, appeared the second volume of 

 the ' Palaeontology of Ohio,' in which I gave descriptions of a 

 number of Monticuliporoids. Many of these had been previ- 

 ously described by me in the ' Quarterly Journal of the Geo- 

 logical Society' (vol. xxx.), but some additional forms were here 

 described as new. As in the paper just alluded to, and for 



