302 



SCIENCE. 



[N. S. Vol. XII. No. 295. 



has found amusement in rolling rocks down 

 the entrance thus smashing the steps and 

 closing the former opening at the bottom of 

 the first series of steps. It was necessary 

 to take a side branch to reach the water. 

 This side branch, for sufiScient reasons, I 

 did not take to its end, although my assist- 

 ants managed to get through to the water 

 without, however, securing any specimens. 

 I was amply rewarded for not entering the 

 deeper recesses by finding in the twilight 

 of the entrance pit an abundant cave fauna. 



!N"ot far from this cave is Beaver cave. 

 This is a winding, twisting channel of no 

 great height or width. All the available 

 time was devoted to securing specimens 

 and the cave was not followed to the end. 

 There is no water except in a pit dug in the 

 cave. 



Animals, though few in species, were sur- 

 prisingly numerous in both these caves. 

 The following species were secured in the 

 well and caves : 



1. A flat worm sp.? — Artesian well. 



Mollusca. 



2. Helieina oriiculaia Say. | 



3. Vitrea petrophila, Bland, pale var. 



4. SiJ!dai-ia contracia Say. VEzell's Cave. 



5. Selicodismts Eigenmanni Pilsbry, 



n. sp. J 



Crustacea. 



6. Cypridopsis vidua obesa Brady and' 



Robertson. 



7. Cyclops cavernarum n. sp. 



8. Cyclops Learii n sp. 



9. Cxcidotxa smithii n. sp. 



10. Ciralonides texensis Benedict. 



11. Brackenridgia cavernarum n. sp. 



and genus. 



12. Crangoiiyx Bowersii n. sp. 



13. Palxmoneies antrorum Benedict. 



14. Larval crustacean, unidentified. 



3Iyriopoda. 



15. sp.? — Ezell'sCave. Beaver Cave. 



Araehnida. 



16. Theiridium Eigenmanni Banks 1 Ezell's Cave. 



n. sp. J Beaver Cave. 



Thysanura. 



17. Degeeria cavernarum Pack. ] Ezell's Cave. 



18. Nieoletia texensis n. sp. J Beaver Cave. 



Artesian well. 



Ezell's Cave. 

 Beaver Cave. 



Artesian well. 



Orthoptera. 



19. Ceutophilus palmeri Scudder. \ ^ „ ' 



■^ [ Beaver Cave. 



Diptera. 



20. Larval Chironomus. — Artesian well. 



Vertehrata. 



21. TypMomolge rathbuni Stejneger. — Artesian well. 



Convergent Evolutions as illustrated by the 

 Blind Lizard Rhineiira : By C. H. Eigen- 

 MANN, Indiana University. 

 Living specimens of the blind lizard 

 Bhineura show a great similarity in color, 

 shape and method of progression to earth- 

 worms which they also resemble in habits. 

 Living specimens were exhibited. 



Tlie Development of the Eyes in the Blind-fish 

 Amblyopsis: By C. H. Eigenmann, In- 

 diana University. 



The eye is perfectly normally outlined. 

 A lens is normally developed but does not 

 become located within the iris. It degen- 

 erates early, disappearing before the fish 

 exceeds 10 mm. in length. The optic nerve 

 is normally developed, and retains its con- 

 nection with the eye and brain till matur- 

 ity. It gradually becomes attenuated, and 

 in the old a connection between the eye 

 and brain cannot be traced. The vitreous 

 body does not become developed to any ex- 

 tent. The secondary optic cup at all times 

 remains a shallow depression. An outer 

 reticular layer does not develop and cones 

 are uncertain in their development. 



The Eye of the Cave Salamander Typhlotriton : 

 By C H. EiGENMANN, Indiana University. 

 The eyelids are closing over the eyes. 

 The eye is normally developed. The retina 

 is normal in the young but with the meta- 

 morphosis or shortly thereafter the rods 

 and cones disappear. 



;So??ie of the Internal Changes which accompany 

 Ecdysis in Insects : By W. L. Tower, Uni- 

 versity of Chicago. 

 The most important of the changes which 



precede ecdysis in insects is the develop- 



