No. 1797. 



NEW TUBULIPOROID BRY0Z0A—BAS8LER. 



515 



C. inflafa, the stolon is quite short, in fact, often practically absent. 

 The numerous examples before me show that this condition may 

 prevail as long as the surface incrusted by the delicate zoaria is fairly 

 even and smooth. Such a surface is afforded by the brachiopods 

 incrusted by the originals of figure 15. The coarse striations of the 

 brachiopod Rqflnesquina squamula, incrusted by the originals of 

 figs. 12a, 6, produce a more uneven surface, and a similar surface is 

 caused by the zooecial apertures and acanthopores of the ramose 

 bryozoan bearing the zoarium figured in 12c, d. The effect upon the 

 length of the stolon is shown in tlis illustrations. 



a 



f 



g 



t % 



Fig. 14.— Corynotrypa intlata section. A group of zocecia, all X20, except possibly g, 



SHOWING SPECIFIC DIFFERENCES, a, CORYNOTRYPA INFLATA; 6, C. ABRUPTA; l'. T. CURTA; d, C. 



MEDiALis; e, C. turgida; /, C. devonica; g, C. smithi. 



In each of the examples compared above, either long or short 

 stolons have been uniformly developed in the portions used for 

 illustration. Such uniformity is not the rule, however, for both 

 extremes and all intermediate lengths may be found m the same 

 zoarium. This is shown in a zoarium incrusting a pedicle valve of 

 Stro'phomena trentonensis, portions of which are smooth and other 

 parts rough (figs. ISa-c). In another colony (fig. 13^), incrusting 

 the nearly smooth base of a Prasopora, the stolon is wanting practi- 

 cally throughout the entire growth. Figure 13e illustrates the length 

 of stolon attained when one zooecium grows over another. Another 

 zoarium bearing zooecia with stolons of variable length is illustrated 

 in figures 13/" and g. 



Normal zooecia of each of the species referred to the C. injlata 

 section of Corynotrypa have been assembled in figure 14. 



CORYNOTRYPA INFLATA (Hall). 



Alecto injlata Hall, Nat. Hist. New York, Pal., vol. 1, 1847, p. 77, pi. 26, figs. 

 7a, h. 



Hippothoa injlata Nicholson, Pal. Ohio, vol. 2, 1875, p. 268, pi. 25, figs. 1-16. 



Stomatopora injlata Vine, Quar. Journ. Geol. Soc. London, vol. 37, 1881, p. 615. — 

 Ulrich Journ. Cincinnati Soc. Nat. Hist., vol. 12, 1890, p. 176, fig. 3c; Geol. 

 and Nat. Hist. Surv. Minnesota, Final Rep., vol. 3, pt. 1, 1893, p. 117, pi. 1, 

 figs. 13-21; Zittel's Textb. Pal. (Eng. ed.), p. 261, fig. 412b.— Simpson, 

 Fourteenth Ann. Rep. State Geol. New York for the year 1894, 1897, p. 597, 

 figs. 202-204.— RuEDEMANN, Bull. New York State Mus., no. 49, 1901 [1902], 

 p. 12, pi. 1, figs. 2, 3. — CuMiNGS, Thirty-second Ann. Rep. Dep. Geol. Nat. 

 Res. Indiana, 1907, p. 886, pi. 32, figs. 1, la 



