10 Gen. Sub. 
I. GENERAL SUBJECTS. 
123. Clapp, Cornelia M. Relation of the axis of the embryo to the first 
cleavage plane. Biol. Lect. Wood’s Holl 1898, pp. 139—151, 6 figg. 
124. *Claus, C. Hofrath Dr. Carl Claus, bis 1873 Autobiographie, 
vollendet von Prof. v. Alth. 8vo, Marburg, 35 pp. with portrait. 
With chronological list of his works. 
125. Cleve, A. Notes on the plankton of some lakes in Lule Lappmark, 
Sweden. Ofv. Ak. Forh. lvi, pp. 825-835, 5 figg. 
126. Cleve, P. T. On the seasonal distribution of some Atlantic plankton- 
organisms. T. c. pp. 785-808. 
127. -. Plankton collected by the Swedish Expedition to Spitzbergen 
in 1898. Svenska Ak. Handl. xxxii, No. 3, pp. 51, 4 pis. 
128. -. Plankton Researches in 1897. T. c. No. 7, pp. 33. 
129. -. The Plankton of the North Sea, the English Channel and the 
Skagerak in 1898. T. c. No. 8, pp. 53. 
130. Coe, Wesley R. The maturation and fertilisation of the egg of 
Cerebratulus. Zool. Jahrb. Anat. xii, pp. 425-476, 3 pis. 
131. Collina, M. Recherches sur l’origine et considerations sur la signi¬ 
fication de la glande pituitaire. Arch. ital. Biol, xxxii, pp. 1-20. 
132. Collins, F. Howard. Heredity and fertility. Nature lix, pp. 5 & 6. 
133. Conklin, E. G. Protoplasmic movement as a factor in differentia¬ 
tion. Biol. Lect. Wood’s Holl for 1898, pp. 69-92, 14 figg. 
Abstract. Science ix, pp. 318 & 319. 
134. -—. Environmental and sexual dimorphism in Crepidula. P. Ac. 
Pliilad. for 1898, pp. 435-444, 3 pis. 
Conte, A. [See Vaney & Conte (781).] 
135. Cook, 0. F. Four categories of species. Amer. Nat. xxiii, pp. 287- 
297. 
136. Corning, H. K. Ueber einige Entwicklungsvorgange am Kopfe der 
Anuren. Morphol. Jahrb. xxvii, pp. 173-241, 2 pis. 
137. Cossmann, P. N. Elemente der empirischen Teleologie. 8vo, Stutt¬ 
gart, pp. 132. 
Coulomb, — . [See Becl1:re, etc. (49).] 
138. Coupin, H. Les poissons commensaux. Rev. Scient. xi, pp. 432- 
436. 
139. Crampton, H. E. Studies upon the early history of the Ascidian 
egg. Part I. The ovarian history of the egg of Molgula manhcittensis. 
J. Morphol. xii (Supplement), pp. 29-56, 1 pi. 
140. Crawley, H. Absorption in vertebrate intestinal cells. Science x, 
pp. 75-80. 
141. Creighton, C. Microscopic researches on glycogen. Part ii. Gly¬ 
cogen of snails and slugs in morphological and physiological corre¬ 
spondence with lymph system of Vertebrates. 8vo, London, vii + 
125 pp., 9 pis. 
142. Cuenot, L. L’excretion chez les mollusques. Arch Biol, xvi, 
pp. 49-96, 2 pis. 
Comparative in part. 
