CONTENTS 
1915 
No. 1. MARCH 
Wiuuiam K. Gregory. Critique of recent work on the morphology of the 
vertebrate skull, especially in relation to the origin of mammals. Twenty- 
ISDE, LSPA Wy Oa ea a Sols eT a Sets Ay rae 1 
E. Haroxp Strickitanp. Further observations on the parasites of Simulium 
Sa TEN MIR S Tie GOS 2 I ee ea Re oon er eegl -o es Ue. AN Re Carmenere ce 48 
C.H. DanrortuH. The myology of Polyodon. Ten figures........ ee ara 107 
Nq. % JUNE 
Raymonp Binrorp. The germ-cells and the process of fertilization in the 
evap evenippe mercenaria. INine plates.......4, ieee 2-6 42+: oie 2 147 
Mary T. Harman. Method of cell-division in the sex cells of Taenia teniae- 
LESTE WOLAER lors onc. US oe co calit se etn es Ds Aa ae ok Rye 6. oa: ieee 205 
H.W. Norris. The cranial nerves of Siren lacertina. Forty-four figures..... 245 
No. 38. SEPTEMBER 
Wixiram A. Hinton. The development of the blood and the transforma- 
tion of some of the early vitelline vessels in Amphibia. Forty-four fig- 
(TSS ke gi ARE Sie NIN PONE ee SS Sn a AME SS, MPN ERR, cork Cs OM 
Grorce T. Haraitr. Germ cells of coelenterates. I. Campanularia flexuosa. 
sMeTHiV=ONCHLOUnCSHertrs ts. ctces. . (2 Seacrest wey eect fae ecner eee tenane neers 383 
Epwarp E. Wiupman. The spermatogenesis of Ascaris megalocephala with 
special reference to the two cytoplasmic inclusions, the refractive body 
and the ‘mitochondria:’ their origin, nature and réle in fertilization. 
AS area PLE ish.) ohn ts Sp cla omer Sul anes< etcler stn less wood Mele g 421 
