AGNATHA AND PISCES. 435 



Wieii, vol. VH, no. 1 (1874), p. 46; Lindstrom, Bihang 



k. Svensk. Akad. Handl., vol. xxi (1895), no. 3. 

 Pafaaspis. Lankester, Geol. Mag. vol. x (1873), pp. 241, 



331 [sensory canals] ; Claypole, Quart. Journ. Geol. 



Soc., vol. XLVIII (1892), p. 552 [so-called fins here 



described do not belong to this organism according to 



Dean, no. 11, p. 71.] 

 Pteraspis. Lankester, no. 25 ; A. S. Woodward, no. 10, vol. 



II, and Proc. Zool. Soc., 1887, p. 478 [sensory canals]; 



A. von Alth, Abh. k. k. geol. Reichsanst. Wien, vol. vn, 



no. 1 (1874). 

 Cephaln-spis. Lankester, no. 25 ; A. S. Woodward, no. 10, 



vol. n, and Geol. Mag. [3] vol. ix (1892), p. 4 [postor- 



bital plate]; Traquair, Proc. Roy. Phys. Soc. Edinb., 



vol. xil (1894), p. 269. 

 Pterichthys. Traquair, Ann. Mag. Nat. Hist. [6] vol. II 



(1888), p. 485, and nos. 21, 27; A. S. Woodward, no. 10, 



vol. ii. 

 Bothriolepis. Whiteaves, no. 23, pt. i; Traquair, loc. cit. 



1888, p. 485, and no. 21 ; A. S. Woodward, no. 10, vol. 



n, and Geol. Mag. [3] vol. ix (1892), p. 484 [jaws]. 



THEORY OF FINS. 



29. E. D. COPE. Review of Zittel's Manual of Palaeontology. 



Amer. Nat, 1887, p. 1014. 



30. A. S. WOODWARD. The Evolution of Fins. Nat. Science, 



vol. i (1892), p. 28. 



31. R. H. TRAQUAIR. On Cladodus neilsoni. Trans. Geol. 



Soc. Glasgow, vol. xi (1897), p. 41. 

 Also nos. 11, 37, 50. 



ELASMOBRANCHII. 



32. O. JAEKEL. Die Selachier von Bolca, ein Beitrag zur 



Morphogenie der Wirbelthiere. Berlin, 1894. 

 Also no. 10, vol. I. 



Silurian Fragments. Pander, no. 12 ; Rohon, no. 26. 

 Pleuropterygii. Dean, no. 11, and Journ. Morphol. vol. ix 



(1894), p. 87, and Trans. N. York Acad. Sci. vol. xm 



(1894), p. 115, and Nat. Science, vol. vin (1896), p. 245. 

 Ichthyotomi. Kner, SB. k. Akad. Wiss., math.-naturw. Cl., 



vol. iv, pt. i (1867), p. 540; Cope, Proc. Amer. Phil. 



Soc., 1884, p. 572 ; C. Brongniart, Bull. Soc. Industrie 



282 



