of the Anthozoa Tabulata. 9 



Besides the difference in their structure, there is also this dis- 

 similarity between these analogous structures in the Favositidae. 

 and the Bryozoa — that in the latter they are regular, and cause 

 the characteristic patches and eminences, whereas in the former 

 they spread along the upper border of the epitheca, and thence 

 become scattered over single calices. 



In the Palaeozoic strata there occur, besides the now described 

 Monticuliporce^ a great many related Bryozoa. Of this nature, 

 for instance, is the Silurian Monticulipora {Callopora) Fletcher i, 

 E. & H., with its regular oblique macule, and others with 

 narrow branches. Allied to these is a Trematopora with jointed 

 branches ; and this genus leads to others, such as the common 

 Glauconome dtsttchay Goldf. [= Vmcularia ?io(?05a, Eichw.), 

 Avhich also had their stems divided by joints, just as in 

 the recent Bugula Murrayana^ Bean, and Cellaria horealisj 

 Busk. 



In the next place, I may give a list of all the genera which 

 by some authors are still regarded as Tabulate Corals, but 

 which, in my opinion, must be eliminated from that class, and 

 numbered amongst the Bryozoa. It may be objected that 

 most of these are provided with tabul«, which have never as 

 yet been observed in the zooecia or proper cells of the Bryozoa, 

 but only in the interstitial cells (Fr. Smitt, loc.cit. pp. 476, 477). 

 The development of the Palaeozoic species, however, out of 

 polyzoaria which have such a decided affinity to the recent 

 Biscoporellce and others, coupled with the total absence of all 

 septa, points with logical necessity to the above conclusion 

 as to their systematic position. They must be placed with 

 the Bryozoa, in the same way that the Cirripedia were re- 

 moved from the Mollusca to the Crustacea, when their develop- 

 ment became known. Even as regards some genera the deve- 

 lopment of which is still unknown, there are points of struc- 

 tural affinity with unquestionable Bryozoa which render their 

 ^i^ reference to this class highly probable. 



Calloporaj Hall (Pal. X. Y. vol, ii. p. 144). To this genus 

 belong Monticulipora Fletcheri^ E. & H., and M. pulchella, 



':. ^- Cenopora, Goldf. (Peteef Germ. i. p. 32). According to 

 D'Orbigny this genus is Brj ozoan ; but Milne-Edwards iden- 

 tifies the Palgeozoic species with Monticulipora. 



Chmtetes^ Fischer von Waldheim (Oryct. Gouv. de Mosc. 

 p. 159). Later authors have given this genus a much greater 

 expansion than that allowed to it by Fischer, who included in 

 it C. radians and its varieties. D'Orbigny (Cours de Pal. 

 vol. ii. p. 110) refers some species to the Bryozoan genus 

 P(y/y^>-e«i«, Risso, and , retains only four as corals. Lonsdale 



