lo Journal of Comparative Neurology and Psychology. 



Description of Specimens on which Measurements have been 

 made. 



Specimen i. Dog Shark {Miistelus cams), length 9^ cm., summer, Woods 

 Hell. 



Specimen 2. Dog Shark, length 9^ cm., summer, Woods Holl. 



Specimen 3. Common Skate (Raja erinacea), length 49 cm., female, sum- 

 mer. Woods Holl. 



Specimen 4. Common Skate, length 48 cm., female, summer. Woods Holl. 



Specimen 5. Common Skate, length 45 cm., female, summer. Woods Holl. 



Specimen 6. Summer Flounder [Paralicthys dentatus), length 40 cm., fe- 

 male, summer, W^oods Holl. 



Specimen 7. Summer Flounder, length 49 cm., summer. Woods Holl. 



Specimen 8. Summer Flounder, length 49 cm., summer. Woods Holl. 



Specimen 9. Frog {Rana virescens), body-weight 22 grms., sciatic nerve, 

 summer. 



Specimen 10. Frog, body-weight 49. 8 grms., sciatic nerve. 



Specimen 11. Frog, body-weight 31 grms., second spinal nerve. 



Specimen 12. Frog, body-weight 31 grms., 8th spinal nerve. 



Specimen 13. Frog, body-weight 74.5 grms., female, second spinal nerve. 



Specimen 14. Frog, body-weight 74.5 grms., female, 8th spinal nerve. 



Specimen 15. Frog, body-weight 74.5 grms., female, dorsal root of the 7th 

 spinal nerve. 



Specimen 16. Frog, body-weight 74.5 grms., female, ventral root of the 7th 

 spinal nerve. 



Specimen 17. Toad (Bufo lentiquiosus), sciatic nerve, summer. 



Specimen 18, Mud-Puppy (Xecturus ??iacula(us) female, length 18 cm., sum- 

 mer. 



Specimen 19. Common Lizard {Sceioporus tniiiulatiis), weight 8.2 grms. 



Specimen 20. Horned Toad {Phrynosoma cormitum), hybernating. 



Specimen 21. American Chameleon (Anolis principalis), weight 2.55 grms. 



Specimen 22. Turtle [Chryseniys inarginata). 



Specimen 23. Domestic Duck, female, 3 weeks old. 



Specimen 24. Chick, female, young. 



Specimen 25. Pigeon (Columba livia) . 



Specimen 26. White Rat (Mus rattiis var. albiis), body-weight 104 grms. 



Specimen 27. White Rat, body-weight 10 grms., 6th cervical nerve. 



Specimen 28. White Rat, body-weight lO grms., 4th thoracic spinal nerve. 



Specimen 29. White Rat, body-weight 10 grms., 2nd lumbar nerve. 



Specimen 30. White Rat, body-weight 25 grms., 6th cervical nerve. 



Specimen 31. White Rat, body-weight 65 grms., 6th cervical nerve. 



Specimen 32. White Rat, body-weight 150 grms., 6th cervical nerve. 



Specimen 33. Rabbit [Leptis cuniculus), adult, male. 



Specimen 34. Agouti [Dascyprocta aguti), weight 1350 grms.. Dr. Wkv.- 

 DESTY, San Francisco. 



Specimen 35. Black Bear (Ursics aimricanus), Dr. Hakdesty, San Fran- 

 cisco. 



