NO. 1M2. JAMES TYPES OE BRYOZOA—BASSLER. 63 



Bythopora parvula (James). 

 (SeealsoPlate V, fig. 4.) 



Figs. 11 and 12. Tangential and vertical sections, X 20, prepared from one of the types 

 of this delicate bryozoan. 



McMicken member of the Eden shales, Loveland, Ohio. 



Arthropora cleavelandi (James). 



(See also Plate IV, fig. 6.) 



13. Outline drawing of type of Ptilodicti/a cleavelandi James, X 2. This illus- 

 trates the usual form of the upper segments of the zoaria of this species. 



14 and 15. Outline drawings of the type specimens of P. grahaini James. These 

 are bifurcated initial segments. 



16. Outline drawing of type of P. duhia James, X 2. This also is an initial seg- 

 ment of the same species as the original of P. cleavelandi, but differs in its 

 simple, unbifurcated, upper articulating extremity. 



All of the specimens are from the Eden shales at Cincinnati, Ohio. 



Plate IV. 



Heiniphragtna. whitfieldi (James). 

 (See also Plate II, figs. 15, 16; plate V, fig. 5.) 



1 and 2. ^'iews of two of the James type specimens, X 1.5. 



Economy member of Eden shales, Cincinnati, Ohio. 

 3 and 4. Two fragments of a more robust form of this species, X 1.5. 



Southgate member of Eden shales, Covington, Kentucky. 



Arfhropom kentuckyeusis (James). 



5. View of the type and only known specimen of this incompletely known 



species, X 6. The lower part of the specimen is l^roken away but 

 doubtless was originally obtusely pointed. 



Bromley shales of the Trenton, Ohio River bank, opjiosite Cincin- 

 nati, Ohio. 



Artltn>j>ora i-tearelaiidi (James). 



(See also Plate III, figs. 13-16. ) 



6. A complete segment of this species, X 6, showing the comparatively 



slender habit of growth and the short lateral })ranches which diverge 

 very nearly at right angles and are particularly characteristic. 

 McMicken member of the Eden shales, Cincinnati, Ohio. 



A rfhroporii rinrimndietiHis ( James ) . 



7. View of the specimen marked as the type of this species, X 6. It is merely 



one of the separated segments but is in a good state of preservation and 

 quite typical. 



Mt. Hope member of the Fairview formation, Cincinnati, Ohio. 



