265 



4. Hallopora goodhuensis (Ulrich) a 



5. Hallopora splendens Bassler a 



6. Homotrypa callosa Ulrich c 



7. Prasopora simulatrix orientalis Ulrich a 



The similarity of the New York fauna to that of upper Mississippi basin 

 as given' by Ulrich is shown by the following lists. Of the 108 species identi- 

 fied, 68 appear in the Trenton and Black river of the upper Mississippi 

 Valley. The collections were made with special reference to the Bryozoan 

 fauna, which accounts for the small number of species reported from the 

 other classes. It is interesting to note the small number of new species 

 found, especially among the Bryozoa, notwithstanding the fact that very lit- 

 tle work had been done on that class from collections of the Trenton and 

 Black river of New York. A description of these wall be given in a succes- 

 sive paper. 



Species from Trenton and Black River of New York. 



(Those marked with an asterisk appear in the Trenton and Black River of the 

 upper Mississippi Valley. T-Trenton. B-Black River.) 





Bryozoa. 



1. 



Arthoclema sp. (T) 



*2. 



cornutum (T, B) 



*3. 



Batostoma? decipiens (T, B) 



*4. 



varium (T, B) 



*5 



supberbum (B) 



*6. 



winchelli spinulosum (T, B) 



7. 



Bythopora sp. (T, B) 



*8. 



herricki (T, B) 



*9. 



Halloporina n. sp. (T) 



no. 



Ceramoporella distincta (T, B) 



*n. 



interporosa (T, B) 



*12. 



Chasmatopora reticulata (T, B) 



*13. 



sublaxa (T) 



*14. 



Corynotrypa delicatula (T) 



*15. 



turgida (T) 



*16. 



inflata (T) 



*17. 



Coeloelema trentonensis (T, B) 



