March 30, 1900.] 



SCIENCE. 



495 



a to (•. Diagrams of the eyes of all the species of 

 the Amblyopsidaj and of Typhlomolge. 



« to e are the eyes of Chologaster coniutus, papitUf- 

 erus and agassizii drawn to scale. 



d, e, (7, h and i are drawn under the same magnifi- 

 cation. 



d. The retina of Chologaster coniuhis. 



e. The retina of Chologaster papiltiferus. 



f. The eye of Typhlomolge under lowermagnitication. 



g. The eye of TuphlieUhijs siMerranens. 

 h. The eye ot Amhlyopsis spcielus. 



i. The eye of Troglichthys rosie. 



