510 SCIENCE PROGRESS. 



Carl H. Ergenmann, Fishes of San Diego. Proc. U.S. Nat. 



Mus., vol. XV., 1892. 

 K. VV. SCHLAMPP. Das Auge des Grottenolmes. ZeitscJi.f. xviss. 



ZooL, Bd. liii. 

 Samuel Garman. Cave Animals from South-western Missouri. 



Bull. Mils. Comp. Zool. Harv., vol. xvii., 1889. 

 G. H. Parker. Eyes in Blind Crayfishes. Ibid_ vol. xx., 1890. 



J. T. Cunningham. 



