BRITISH DEVONIAN BRACHIOPODA. 33 



glabra and Sp. curvata may be one species or varieties of a single type ; and I have but 

 little doubt that several more so-termed distinct species will eventually have to be united 

 to it in a similar manner. 



Professor M'Coy, in 1844, proposed a genus {Meticularia}) to include 8p. imbricata, 

 8p. lineata, and similar shells " having a reticulated or striated surface combined with 

 the general form and cardinal area of Martinia^'' and added that the genus is Carboni- 

 ferous and Devonian. It will, therefore, be a matter for consideration whether his genus 

 should be retained for those reticulated species with a perforated shell-structure, Sp. lavis, 

 8p. imbricata, Sp. lineata, &c. Should it be definitely determined that Sp. glabra, Martin, 

 1809, and Sp. curvata, Schloth., 1822, be united into one species, Martin's name would 

 have to be retained. 



19. Spirifera undifera, F. Roemer. Dav., Dev. Mon., PL VII, figs. 1 — 10; and Dev. 



Sup., PI. I, fig. 83. 



Since the publication of my description of this species at p. 36 of my ' Devonian 

 Monograph ' the Rev. Norman Glass has developed its spirals, and of these I give a 

 figure. 



20. Spirifera l^vicosta, Val, apud Lamarck, 1819. Dav., Dev. Mon., PL VIII, figs. 



4, 5 ; and Dev. Sup,, PI. 

 II, figs. 2, 3. 



Terebbatulites ostiolatus, Scldoth. Nachtragen zur Petrefactenkuude, pi. xvii, 



fig. 3, 1822. 



At p. 28 of my ' Devonian Monograph ' I described this species, and gave reasons 

 why I had adopted Valenciennes' name. In a paper by Prof. Gosselet, entitled " De 

 I'usage du droit de priorite et de son application aux noms de quelques Spiriferes,"^ the 

 distinguished Prench geologist finds great fault with my having made use of Valen- 

 ciennes' name in preference to that given to the species by Schlotheim in 1822, and adds 

 that Valenciennes' description — "T. testa trigona gibba, lateribus sulcata; in medio 

 valvse majoris, sinu, et minoris costa lata, utribusque Isevibus, transversa striatis : cardine 

 recto, nate incurva. Habite Fossile de Bemberg, pres de Cologne. . . Rapportee ' par M^ 



^ ' A Synopsis of the Characters of the Carboniferous Limestone Fossils of Ireland,' 1844. 

 2 * Annales de la Societe Geologique du Nord,' vol. vii, 1880. 



5 



