1896.] NATURAL SCIENCES OF PHILADELPHIA. 251 



ment of the eye-ball and the great development of the lachrymal 

 gland). 



189 — The origin of sex through cumulative integration and the 

 relation of sexuality to the genesis of species. Proc. Amer. Phil. 

 Soc, 1890, pp. 109-159. 



190 — On the kinds of motion in the ultimate units of contractile 

 living matter. Proc. Amer. Assoc. Adv. Sci., Vol. XL, 1891, p. 328. 



191 — On two new and undescribed methods of contractility man- 

 ifested by filaments of protoplasm. Proc. Acad. Nat. Sci., Phila., 

 1891, pp. 10-12. (Fixed and reversible spiral contraction in Vor- 

 tlcella and in Trypanosoma balbianii respectively). 



192— An attempt to illustrate some of the primary laws of me- 

 chanical evolution. Proc. Acad. Nat. Sci. Phila., 1891, pp. 62-70. 



193 — Sherwood and Ryder. Abnormal duplication of urosome 

 in Rana catesbiana. Amer. Nat., 1891, pp. 740-742. (Remark 

 upon bifid-tailed tadpoles). 



194 — Notes on the development of Engy stoma. Amer. Nat., 1891, 

 pp. 838-840. 



195 — On the mechanical genesis of the scales of fishes. Proc. 

 Acad. Nat. Sci. Phila., 1892, pp. 219-224, 3 figs. Reprint in Ann. 

 & Mag. Nat. Hist, XI, pp. 243-248. 



196 — Diffuse pigmentation of the epidermis of the oyster due to 

 prolonged exposure to the light ; regeneration of shell and loss of 

 adductor muscle. Proc. Acad. Nat. Sci. Phila., 1892, pp. 350-351. 

 (Recording observations of Prof. R. C. Schiedt). 



197 — Hermaphroditism and viviparity of the oysters of the north- 

 west coast of the United States. Proc. Acad. Nat. Sci. Phila., 1892, 

 pp. 351-352. (Recorded in behalf of Prof. R. C. Schiedt). 



198 — On the cause of the greening of the oyster and its presumed 

 algous endo-parasites. Proc. Acad. Nat. Sci. Phila., 1892, p. 352. 



199 — The principle of the conservation of energy in biological 

 evolution : a reclamation and critique. Proc. Acad. Nat. Sci. Phila., 

 1892, pp. 455-468. 



200 — A geometrical representation of the relative intensity of the 

 conflict between organisms. Amer. Nat., 1892, pp. 923-929. 



201 — Cholera and flies. Entomological News, Oct., 1892, pp. 

 210-211. (Reprint from Public Ledger, Phila.). 



202 — The inheritence of modifications due to disturbances of the 

 early stages of development, especially in the Japanese domesticated 

 races of gold-carp. Proc. Acad. Nat. Sci. Phila,, 1893, pp. 75-94. 



203 — The vascular respiratory mechanism of the vertical fins of 

 the viviparous Embiotocidae. Proc. Acad. Nat. Sci. Phila., 1893, 

 pp. 95-99, 1 fig. 



204 — Energy as a factor in organic evolution. Proc. Amer. 

 Phil. Soc, 1893, XXXI, pp. 192-203. (Upon ergogeny, kineto- 

 geny and statogeny, with an appendix giving a list of the author's 

 papers on ergogenetic development of morphological characters — 25 

 titles). 



