12 ANNUAL REPORT OF THE 



144. Howard, A. D. — On the Structure of the Outer Segments of 



the Rods in the Retina of Vertebrates. Amer. Naturalist, 

 Vol. 37, No. 440, pp. 541-550. September, 1903. 



145. Breed, R. S. — The Changes which occur in the Muscles of a 



Beetle, Thvmalus marginicollis Chevr., during Metamorphosis. 

 Bull. Mus. Comp. Zool.. Vol. 40, No. 7, pp. 315-382. 7 pis. 

 October, 1903. 



146. Castle, W. E. — The Laws of Heredity of Galton and Mendel, 



and Some Laws Governing Race Improvement by Selection. 

 -Proceed. Amer. Acad. Arts and Sci., Vol. 39, No. 8, pp. 

 221-242. November, 1903. 



147. Carlton, F. C. — The Color Changes in the Skin of the so-called 



Florida Chameleon, Anolis carolinensis Cuv. Proceed. Amer. 

 Acad. Arts and Sci., Vol. 39, No. 10, pp. 257-276. 1 pi. 

 December, 1903. 



148. Lander, C. H. — The Anatomy of Hemiurus crenatus (Rud.) 



Lithe, an Appendiculate Trematode. Bull. Mus. Comp. Zool., 

 Vol. 45, No. 1, pp. 1-28. 4 pis. January, 1904. 



149. Peters, A. W. — Metabolism and Division in Protozoa. Proceed. 



Amer. Acad. Arts and Sci., vol. 39, No. 20, pp. 439-516. 

 April, 1904. 



150. Hall, R. W. — The Development of the Mesonephros and the 



Miillerian Duct in the Amphibia. Bull. Mus. Comp. Zool., 

 Vol. 45, No. 2, pp. 29-125. 8 pis. June, 1904. 



151. Bigelow, H. B. — - The Sense of Hearing in the Goldfish Caras- 



sius auratus L. Amer. Naturalist, Vol. 38, No. 448, pp. 

 275-284. April [June], 1904. 



