88 



BULLETIN 77, UNITED STATES NATIONAL MUSEUM. 



The specific name is in honor of the late Dr. Friedrich von Schmidt, 

 in appreciation of his Hfe-long work upon the geology and paleontology 

 of the Russian Ordovician. 



Occurrence. — ^Apparently rare in the Jewe limestone (Dl), Baron 

 Toll's estate, near Jewe, Esthonia. 



Holotype.— Cat. No. 57198, U.S.N.M. 



CREPIPORA LUNATIFERA, new species. 



Text fig. 27. 



Zoarium forming a broad but thin crust upon foreign objects, with 

 the individual layers less than a millimeter in thickness. The type- 

 specimen consists of several fragmentary zooecia incrusting an exam- 



d 



Pig. 27.— Ceepipora ltxnatifeka. a, the type-specimen, iNCEUSTma Hokmotoma insignis (Eich- 



WALD), TWO-THIEDS natural size; &, view of the ZOCECIA at the surface, X9; C and d, TANGENTIAL 

 SECTIONS, X20 AND X35, ILLUSTRATING ZOCECIAL STRUCTURE; e, VERTICAL SECTION, X 20, THROUGH THE 

 ZOARIUM. WeSENBEEG LIMESTONE (E), WeSENBERG, ESTHONIA. 



pie of the large gastropod Hormotoma insignis (Eichwald) . The sur- 

 face of these zoaria is smooth with no conspicuously marked maculae, 

 although groups of large zooecia clustered about a few mesopores are 

 present. Such groups, although easily overlooked, may be detected 



