588 



INDEX 



/^ERM cells in Ascaris incurva. The 61 



Glands (thyroid, thymus, hypophysis, and 

 pineal). The growth of the body and 

 organs of the albino rat as affected by 



feeding various ductless ■ • 295 



Gonium. The mechanism of orientation in. 431 

 Goodrich, H. B. The germ cells in Ascaris 

 incurva 61 



HAWI'CES, Oneha a. Merritt. The ef- 

 fect of moisture upon the silk of the 

 hybrid Philosamia (Attacus) ricini 

 Boisd. d' X Philosamia cynthia (Drury) 

 9 51 



Head-form and head frequency in Planaria 

 by means of potassium cyanide. Studies 

 on the dynamics of morphogenesis in ex- 

 perimental reproduction and inheritance. 

 IX. The control of 101 



HosKiNS, E. R. The growth of the body and 

 organs of the albino rat as affected by 

 feeding various ductless glands (thyroid, 

 thymus, hypophysis, and pineal) 295 



Hybrid Philosamia (Attacus) ricini Boisd. 

 cf X Philosamia cynthia (Drury) 9 . 

 The effect of moisture upon the silk of 

 the 51 



Hydatina. Factors affecting male-produc- 

 tion in 127 



Hypophysis, and pineal). The growth of 

 the body and organs of the albino rat as 

 affected by feeding various ductless 

 glands (thyroid, thymus 295 



TNCURVA. Tlie germ cells in A.scaris. ... 61 



Inheritance. IX. The control of head-form 

 and head frequency in Planaria by 

 means of potassium cyanide. Studies 

 on the dynamics of morphogenesis in 

 experimental reproduction and 101 



L.\D()FF, SoNiA, Shull, a. Franklin 

 und. Factors affecting male-production 

 in Hydatina 127 



L.^^sHLEY, K. S., Mast, S. O. and. Observa- 

 tions on ciliary current in free-swimming 

 paramecia 281 



Lenses of some teratophtlialmic embryos and 

 its significance for the normal develop- 

 ment of the lens in vertebrates. On the 

 blastolytic origin of the ' independent' . . . 347 



LiLLiE, R.vLPH S. The physiology of cell- 

 division. VI. Rhythmical changes in 

 the resistance of the dividing sea-urchin 

 egg to hypotonic sea water and their phys- 

 iological significance 369 



MALE-PRODUCTION in Hydatina. 

 Factors affecting 127 



Marginatum Milne-Edwards with special ref- 

 erence to its neuro-muscular mechanism. 

 The structure of Metridium (Actinoloba). . 433 



Mast, S. O. and Lashley, K. S. Observa- 

 tions on ciliary current in free-swimming 

 paramecia 281 



Mast, S. O. and Root, I^. M. Observations 

 on ameba feeding on rotifers, nematodes 

 and ciliates. and their bearing on the 

 surface-tension theory 33 



Mechanism of orientation in Gonium. The. 431 



Mechanism. The structure of Metridium 

 (Actinoloba) marginatum Milne-Edwards 

 with special reference to its neuro-mus- 

 cular 433 



Metridium (Actinoloba) marginatum Milne- 

 Edwards with special reference to its 

 neuro-muscular mechanism. The struc- 

 ture of 433 



Metz, Charles W. Chromosome studies on 

 the Diptera. II. The paired assosiation 

 of chromosomes in the Diptera, and its 

 significance 213 



Milne-Edwards with special reference to its 

 neuro-muscular mechanism. The struc- 

 ture of Metridium (Actinoloba) margina- 

 tum 433 



Moisture upon the silk of the hybrid Philo- 

 samia (Attacus) ricini Boisd. cf X Philo- 

 samia cynthia (Drury) 9 . The effect of. 51 



Monsters. I. An etiology and an analysis 

 of the morphogenesis of monsters. Ex- 

 perimental studies on the origin of 485 



Moore, A. R. The mechanism of orientation 

 in Gonium 431 



.Morphogenesis in experimental reproduc- 

 tion and inheritance. IX. The control of 

 head-form and head frequency in Pla- 

 naria by means of potassium cyanide. 

 Studies on the dynamics of 101 



.Morphogenesis of monsters. Experimental 

 studies on the origin of monsters. I. An 

 etiology and an analysis of the 485 



Mussels. The absorption of nutriment from 



solution by freshwater 403 



NEMATODES and ciliates, and their 

 bearing on the surface-tension theory. 

 Observations on ameba feeding on roti- 

 fers 33 



Neuro-muscular mechanism. The structure 

 of Metridium (.\ctinoIoba) marginatum. 

 Milne-Edwards with special reference to 



its 433 



Nutriment from solution by freshwater 

 mussels. The absorption of 403 



ORCi.WS of the albino rat as affected by 

 feeding various ductless glands (thy- 

 roid, thvmus, hypophvsis, and pineal). 

 The growth of the body and 295 



Organs on the rate of regeneration in Cassio- 

 pea xamachana. The influence of the 

 marginal sense 1 



Orientation in Gonium. The mechanism of. 431 



Origin of monsters. I. An etiology and an 

 analysis of the morphogenesis of mon- 

 sters. Experimental studies on the 485 



Origin of the 'independent' len.ses of some tera- 

 tophthalmic embryos and its significance 

 for the normal development of the lens in 

 vertebrates. On the blastolytic .347 



PACKARD, Charles. The effect of ra- 

 dium radiations on the rate of cell divi- 

 sion 199 



Paramecia. Observations on ciliary current 

 in free-swimming 281 



Parker, G. H. The effector systems of actin- 

 ians 461 



Parker, G. H. and Titos, E. G. The struc- 

 ture of metridium ( Actinoloba) margina- 

 tum Milne-Edwards with special reference 

 to its neuro-muscular mechanism. 433 



Philosamia (Attacus) ricini Boisd. cf X Phil- 

 osamia cynthia (Drury) 9. The effect 

 of moisture upon the silk of the hybrid. . . 51 



Philosamia cynthia (Drury) 9 . The effect 

 of moisture upon the silk of the hybrid 

 Philosamia (Attacus) ricini Boisd. cf X. 51 



Pineal). The growth of the body and organs 

 of the albino rat as affected by feeding 

 various ductless glands (thyroid, thymus, 

 hypophysis, and 295 



