CHAPTER V. 



Branch MOLLUSCOIDEA. 



Class BRYOZOA. 

 Order CYCLOSTOMATA. 

 Family DIA.STOPHORIDAE. 



Genus STOMATOPORA Bronn. 



Stomatopora regularis Gabb & Horn. 

 Plate XX., Figs. 1-3. 



1862. Stomatopora regularis G. & H., Jour. Acad. Nat. Sci. 



Phil., 2d ser., vol. 5, p. 172, pi. 21, fig. 63 (fig. 64 on 



plate). 

 1864. Alec to regularis Meek, Check List Inv. Foss. N. A., Cret. 



and Jur., p. 4. 



1868. Alecto regularis Con., Cook's Geol. N. J., p. 723. 

 1905. Alecto regularis Johns., Proc. Acad. Nat. Sci. Phil., 1905, 



P. 5- 



Description. Zoarium encrusting, ramose, the branches fili- 

 form and usually very regular, from .4 mm. to .6 mm. in width, 

 the surface slightly convex, the sides sloping gently towards the 

 lateral margins, rarely or never abrupt. Zopecia regular in shape, 

 usually a little wider just behind the aperture and the sides con- 

 verging slightly posteriorly, this difference in width, however, 

 is frequently scarcely noticeable and is never sufficient to sharply 

 separate the successive zocecia from each other. Zocecial 

 apertures circular, tubular and inclined a little forward in un- 

 worn specimens. 



Remarks. This species will not be easily confused with any 

 of its associates, except possibly Filifascigera megaera, and from 

 this species it can always be distinguished by the single circular 

 aperture of the zooecial tubes. 



(313) 



