ZOOLOGY 37 



interpretation of the seventeen types into which the variants 

 of the postcava found in the cat and man can be classified. 



Other papers include : 



Arai, " On the Cause of the Hypertrophy of the Surviving Ovary after 

 Semispaying (Albino Rat) and on the Number of Ova in it" {Amer. Jour. 

 Anat., vol. xxviii, No. i, Nov. 1920); Allen, "Bison Remains from New 

 England " {Jour. Mamm., vol. i. No. 4, Aug. 1920), and " An Insular 

 Race of Cotton Rat from the Florida Keys " {ibid.. No. 5, Nov. 1920) ; 

 Baldwin, " Notes on the Branches of the Aorta (arcus aortae) and the Sub- 

 clavian Artery of the Rabbit" {Anat. Rec, vol. xix. No. 3, Aug. 1920) ; 

 Bayon, "Racial and Sexual Differences in the Appendix Vermiformis " 

 ibid.. No. 4, Sept. 1920) ; Begg, " Absence of the Vena Cava In- 

 ferion in a 12-mm. Pig Embryo, associated with the Drainage of the 

 Portal System into the Cardinal System" {Amer. Jour. Anat., vol. xxvii. 

 No. 4, Sept. 1920) ; Black, " Studies on Endocranial Anatomy: II. On the 

 Endocranial Anatomy of Oreodon {Merycoidodon) " {Jour. Comp. Neur., 

 vol. xxxii. No. 3, Dec. 1920) ; Dewey, " A Contribution to the Study of the 

 Lymphatic System of the Eye" {Anat. Rec, vol. xix, No. 2, July 1920) ; 

 Downs and Eddy, " Effect of Subcutaneous Injections of Thymus Sub- 

 stances in Young Rabbits " {Endocr., vol. iv. No. 3, July 1920) ; Dunn, 

 " Types of White Spotting in Mice" {Amer. Nat., vol. liv. No. 635, Dec. 

 1920) ; Carey, " Studies in the Dynamics of Histogenesis : Growth Motive 

 Force as a Dynamic Stimulus to the Genesis of Muscular and Skeletal 

 Tissues " {Anat. Rec, vol. xix, No. 4, Sept. 1920) ; Ellis, "Norms for some 

 Structural Changes in the Human Cerebellum from Birth to Old Age " {Jour. 

 Comp. Neur., vol. xxxii. No. i, Aug. 1920) ; Gidley, " A Pleistocene Cave 

 Deposit of Western Maryland " {Smithson Rep., No. 2563, 1920) ; Grinnell, 

 " A New Kangaroo Rat from the San Joaquin Valley, California " [Jour. 

 Mamm., vol. i. No. 4, Aug. 1920) ; Guyer and Smith, " Studies on Cyto- 

 lysins: II. Transmission of Induced Eye Defects" {Jour. Exp. Zool., vol. 

 xxxi, No. 2, Aug. 1920) ; Hanson, " The History of the Earliest Stage in the 

 Human Clavicle," and " The Problem of the Coracoid " {Anat. Rec, vol. xix. 

 No. 6, Nov. 1920) ; Hartman, " Studies in the Development of the Opossum 

 {Didelphys virginiana, L.) : 'The Phenomenon of Parturition'" {ibid.. 

 No. 5, 1920) ; Howell, " Description of a New Species of Beach 

 Mouse from Florida " {Jour. Mamm., vol. i. No. 5, Nov. 1920) ; Jewett, 

 " Notes on Two Species of Phenacomys in Oregon " {ibid.. No. 4, Aug. 1920) ; 

 Jordan, "Further Studies on Red Bone-marrow: I. Experimental; II. 

 Cytologic, with Special Reference to the Data suggesting Intra-cellular 

 Hemocytogenic Activity on the part of the Giant Cells and to the Significance 

 of the so-called Mitotic Figures in these Cells " {Amer. Jour. Anat., vol. 

 xxvii. No. 3, July 1920) ; Kingsbury, " The Extent of the Floor-plate of 

 His and its Significance " {Jour. Comp. Neur., vol. xxxii. No. i, Aug. 1920) ; 

 Kuntz, " The Development of the Sympathetic Nervous System in Man " 

 {ibid.. No. 2, Oct. 1920) ; Lima, " Anatomy of a Fetus of a Cyclopean Goat " 

 {Anat. Rec, vol. xix. No. 2, July 1920) ; Little, " Factors Influencing the 

 Growth of a Transplantable Tumour in Mice" {Jour, Exp. Zool., vol. xxxi, 

 No. 3, Oct. 1920) ; Matthew, " A New Genus of Rodents from the Middle 

 Eocene " {Jour. Mamm., vol. i, No. 4, Aug. 1920) ; Nittono, " On the 

 Growth of the Neurons composing the Gasserian Ganglion of the Albino 

 Rat — between Birth and Maturity " {Jour. Comp. Neur., vol. xxxii, No. 2, 

 Oct. 1920) ; Slonaker, " Some Morphological Changes for Adaptation in 

 the Mole " {Jour. Morph., vol. xxxiv, No. 2, Sept. 1920) ; Stewart, " On the 

 Origin of the Ganglion Cells of the Nervus Terminalis of the Albino Rat " 

 {Jour. Comp. Neur., vol. xxxii. No. i, Aug. 1920) ; Suitsu, " Comparative 



