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Studies on the Development of the Veno-Lymphatics in the Tail- 
region of Polistotrema (Bclellostoma) stouti. First Com- 
munication: Formation of the Caudal Hearts. By William F. 
Allen. Publication No. 11 from the Zoological Laboratory of the 
University of Illinois, Urbana, Illinois. (With Plates 19 to 21) ;3()9 
CONTENTS OF No. 235, N.S., NOVEMBER, 1913. 
MEMOIRS : 
On some Queensland Trematodes, with Anatomical Observations 
and Descriptions of New Species and Grenera. By S. J. 
Johnston, B.A., D.Sc., Demonstrator of Biology, University of 
Sydney. (With Plates 22 to 27 j .... 201 
On the Maxillary Glands and some other Features in the Internal 
Anatomy of Squilla. By W. N. F. Woodland, The Muir Central 
College, Allahabad, India (late of University College, London). 
(With Plate 28 and 9 Text-figures) . . . . 401 
On a Remarkable New Type of Protistan Parasite. By H. M. 
Woodcock, D.Sc., and G. Lapage, B.Sc. (With Plates 29 and 
30 and 2 Text-figures) . . . . .431 
Studies on Parasitic Protozoa. II. (a) The Encystment of R h i z o - 
mastix gracilis Alexeieff ; (b) Tetratri choniastix 
parisii, n. sub-gen., n. sp. By Doris L. Mackinnon, B.Sc., 
Assistant in the Zoology Department, University College, 
Dundee. (With Plates 31 and 32) . . . . 459 
CONTENTS OF No. 236, N.S., FEBRUARY, 1914. 
MEMOIRS: 
The Development of Echinocardium cor da turn. Part I. — 
The External Features of the Development. By E. W. 
MacBride, F.R.S., V.P.Z.S., Professor of Zoology in the 
Imperial College of Science and Technology. (With Plates 33 
and 34) ...... 471 
Chromosomes, Heredity, and Sex : A Review of the Present State 
of the Evidence with regard to the Material Basis of Hereditary 
Transmission and Sex-Determination. By L. Doncaster, Sc.D., 
Fellow of King’s College, Cambridge. (With 4 Text-figures) . 487 
A Cytological Study of CEnothera mut. lata andCE. mut. semi- 
lata in Relation to Mutation. By R. Ruggles Gates, Ph.D., 
F.L.S., and Nesta Thomas, B.Sc. (With Plates 35-37 and 4 
Text-figures) ...... 523 
On the Development and Morphology of the Mandibular and 
Hyoid Muscles of Mammals. By F. H. Edgeworth, M.D., 
Professor of Medicine, University of Bristol. (With Plates 38- 
45 and 9 Text-figures) . . . . .573 
Title, Index, and Contents. 
