134 report— 1884. 



many of the Cretaceous and Jurassic species in their unicellular character, 

 and Stomatopora major, except in the want; of fenestration, seem to be 

 allied to forms described by Prof. Nicholson from the Cincinnati rocks of 

 America, but my own uniserial forms differ from the Jurassic. 1 



Family II. Tubuliporid^;. 



Zoarium entirely adherent, or more or less free and erect, multiform, 

 often linear, or flabellate or lobate, sometimes cylindrical. Zooecia 

 tubular, disposed in contiguous series, or in single lines. Ocecium an 

 inflation of the surface of the zoarium at certain points or a modified cell. 



In Busk's ' Crag Polyzoa,' p. 91, the Tubuliporidse include the three 

 genera — Mesenteripora,~B\a,inv., Tubidipora, Lamk., and Alecto (Stomato- 

 pora) Lamx. In the ' III. Brit. Mus. Catalogue of Polyzoa,' p. 23, Alecto, 

 Stomatopora and Tubidipora only are included. The Mesenteripora is 

 relegated to the Diastoporidse. In Mr. Hincks' ' Brit. Marine Polyzoa,' 

 the Tubuliporida? include the genera — 



Stomatopora, Bronn. Entalopjiora, Lamx. 



TuBULiPORA, Lamk. Diastopoea, (part) Lamx. 



Idmonea, Lamx. 



Genus Stomatopora, Bronn. 



1821, Alecto, 2 Lamx. ; 1825, Stomatopora, Bronn.; 1S26, Aulopora, 



Goldfuss (part). 



Zoarium repent, wholly adnate, or free at the extremities, or giving off 

 erect processes, simple or branched ; branches more or less ligulate. 

 Zoo ria in great part immersed, arranged in a single series or in several, 

 which take a linear direction or are very slightly divergent. — Busk, 

 'Brit. Mus. Cat. III.' p. 23 ; Hincks, ' Brit, Mar. Polyzoa,' p. 424. 



Of my own knowledge I have but little to furnish respecting Tertiary 

 Stomatopora below the ' Crag.' My continental material, both Eocene 

 and Miocene, has only yielded to me a few very minute fragments of two 

 species. In his work on the ' Bryozoa of Castrocaro ' (Pliocene), Manzoni 

 describes three species of Stomatopora (Alecto) as found by him. One 

 species of very frequent occurrence is named by him Alecto. Gastrocarensis, 

 Manzoni. It is a very fine example of this type. The large and peculiar 

 character of the cells is noted by the author (' Brioz. Castro.' p. 40, pi. vi. 

 figs. 71, 71'). Thezocecice are granulose and punctate, but except that he 

 speaks of the grand dimensions of the cells we are left in entire ignorance 

 of their natural size. Besides this beautiful form Manzoni describes and 

 figures two other Stomatoporce — S. (Alecto) repens, 3 Wood, and S. (Alecto) 

 parasita, 4 Heller. 



In the ' Crag Polyzoa' (p. 112, pi. xx. figs. 5, 8, and ibid. figs. 6, 7) 

 Mr. Busk describes and figures A. repens, S. Wood, and A. dilatans, W. 

 Thomson. I cannot regard — so far as I may be allowed to express an 

 opinion by comparing the figures in the absence of specimens of Manzoni's 

 type — the A. repens of Busk, and the A. repens of Manzoni as one and the 

 same species. The Crag specimens in my cabinet show very well the 

 characters of Busk's species, but none of the cell characters of Manzoni's. 



1 See ' Silurian Uniserial Stomatoporae and Wenlock Polyzoa ' (ruihi\ Quart. 

 Jovr. Gcol. Soc, Aug. 1881, Feb. 1882. 



- Name previously used for a group of Echinoderms by Leach (1814). 

 * Ibid. tav. vi. fig. 72. 4 Tav. vii. fie. B9 



