24 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4O 



NiCKLES, J. M. 



1905. The upper Ordovician rocks of Kentucky and their Bryozoa. Ken- 

 tucky Geol. Surv. Bull. 5, 64 pp., 3 pis. 

 Ulrich, E. O. 



1879. Description of a new genus and some new species of bryozoans from 



the Cincinnati group. Journ. Cincinnati Soc. Nat. Hist., vol. 2, 

 pp. 119-131, pl. 12. 



1880. Catalogue of fossils occurring in the Cincinnati group of Ohio, In- 



diana, and Kentucky. 31 pp. 

 1882. American Paleozoic Bryozoa. Journ. Cincinnati Soc. Nat. Hist., 



vol. 5, pt. I, pp. 121-175, pis. 6-8; pt. 2, pp. 232-257, pis. 10, II. 

 1886. Report on the lower Silurian Bryozoa, with preliminary descriptions 



of some of the new species. 14th Ann. Rep. Geol. Nat. Hist. Surv. 



Minnesota, pp. 57-103. 



1889. Contributions to the micro-paleontology of the Cambro-Silurian rocks 



of Canada, pt. 2. Nat. Hist. Surv. Canada, pp. 27-57, pis. 8, 9. 



1890. Paleozoic Bryozoa. Paleontology of Illinois, geology and paleon- 



tology. Illinois Geol. Surv., vol. 8, pt. 2, sect. 6, pp. 287-688, 17 

 text figs., pis. 29-78. 



1893. On lower Silurian Bryozoa of Minnesota. Geology Minnesota, vol. 3, 

 pt. I, chap. 4, pp. 96-332, 20 text figs., 28 pis. 

 Ulrich, E. O., and Bassler, R. S. 



1904. A revision of the Paleozoic Bryozoa, Pt. II, Trepostomata. Smith- 

 sonian Misc. Coll., vol. 47, No. 1470, pp. 15-55, pis. 6-14. 



1913. Lower Devonian systematic paleontology, Molluscoidea. Geol. Surv. 

 Maryland, pp. 259-290, pis. 41-52. 



ViNASSA DE ReGNY, P. 



1920. Sulla classificazione dei treptostomidi. Atti Soc. Ital. Sci. Nat., vol. 

 59, pp. 212-231. 



EXPLANATION OF PLATES 



Plate i 

 Batostoma implicatum (Nicholson) 



Fig. I. Longitudinal view of identified specimen, U.S.N.M. 138266, X SO, show- 

 ing acanthopores with lateral branches or nodes. U.S.N.M. collec- 

 tion 2999. 



Fig. 2. Transverse view of identified specimen, U.S.N.M. 138267, X SO, illus- 

 trating the continuity of the zooecial wall of the endozone and the 

 zooecial boundary in the exozone. Note also the typical configuration 

 of the laminae in the exozone. U.S.N.M. collection 2999. 



Fig. 3a. Longitudinal view of identified specimen, U.S.N.M. 138268, X SO, show- 

 ing several notched acanthopores and continuity between the zooecial- 

 mesopore boundary and the dark, granular, proximal layer of the 

 mesopore diaphragms. U.S.N.M. collection 2995. 



Fig. 3b. Longitudinal view of the overgrowth of same zoarium, X lOO, showing 

 wall structure that is typical of the species. 



Fig. 4. Longitudinal view of identified specimen, U.S.N.M. 138269, X S, show- 

 ing irregular zooecial growth of anastomosing branches. U.S.N.M. 

 collection 2995. 



