56 SCIENCE PROGRESS 



Process of Disappearance of the Conus Arteriosus in Teleosts " 

 {Anat. Rec. vol. xv. No. 2, September 191 8) ; Pinney, " A Study 

 of the Relation of the Behaviour of the Chromatin to Develop- 

 ment and Heredity in Teleost Ptybrids " {Jour. Morph. vol. 

 xxxi. No. 2, September 191 8) ; and Newman, " Hybrids be- 

 tween Fundulus and Mackerel : A Study of Paternal Heredity 

 in Heterogenic Hybrids " {Jour. Exp. Zool. vol. xxvi. No. 3, 

 August 191 8). " The Development of the Hypophysis of the 

 Anura " has been worked out by Atwell {Anat. Rec. vol. xv. 

 No. 2, September 191 8), who finds this body to consist of three 

 epithelial lobes and a neural lobe. The former form the 

 anterior lobes, the pars intermedia, and the pars tuberalis. 

 The caudal end of the primitive infundibulum thickens and 

 becomes transversed by a ridge which later is constricted from 

 the infundibulum dorsally and at the sides, and so comes to 

 form a definite neural lobe. The pars intermedia develops 

 from the caudal tip of the hypophyseal rudiment ; the anterior 

 lobe proper comes from the main central part of the rudiment, 

 and the pars tuberalis takes origin from the lateral lobes. Other 

 papers include : Johnson, " On the question of Commissural 

 Neurones in the Sympathetic Ganglia " {Jour. Comp. Neur. 

 vol. xxix. No. 4, August 191 8) ; Matsumoto, " Demonstration 

 of Epithelial Movement by the use of vital staining, with 

 Observations on Phagocytosis in the Corneal Epithelium " 

 {Jour. Exp. Zool. vol. xxvii. No. 1, October 191 8) ; McClure, 

 " On the Behaviour of Bufo and Rana toward Colloidal Dyes 

 of the Azo Group (trypan blue and dye No. 161) " {Amer. 

 Anat. Mem. No. 8, July 191 8), and Bhatia and Prashad, " The 

 Skull of Rana tigrina Daud." {Proc. Zool. Soc. Parts 1 and 2, 

 August 191 8). 



It has been shown by Redfield, " The Physiology of the 

 Melanophores of the Horned Toad Phrynosoma " {Jour. Exp. 

 Zool. vol. xxvi. No. 2, July 191 8), that there are three types 

 of colour change, the first corresponding with daily changes 

 of temperature and illumination, the second an adaptation to 

 the general environment, and the third connected with nervous 

 excitement. The contraction of the melanophores during 

 nervous excitement is in part due to the activity of the sympa- 

 thetic nervous system and in part to the secretion of adrenin 

 by the adrenal glands. 



Other papers include : Boulenger, " Description of a new 



