ONTENTS 
PART II.— 1861. 
XVII. Outlines of the Distribution of Arctic Plants. By Jos. D. Hooker, M.J)., F.B.S., 
8fc. page 251 
XVIII. Further Observations on Entozoa, with Experiments. By T. Spencer Cobbold, 
M.D., F.L.S. 
319 
. On Prolification in Flowers, and especially on that Form termed Median Prolifi- 
cation. By Maxwell T. Masters, Esq., F.L.S., Lecturer on Botany at St. George's 
Hospital 
359 
. On the Circulation of the Blood m Pegea, as bearing on the question of a Lining to 
the Vascular System in the Tunicata in general. By John D. Machonald, B.N., 
F.B.S. Communicated by George Busk, Esq., F.B.S., Sec. L.S. .... 371 
XXI. On the Physiology of the Pallial Sinuses of the Brachiopoda. By John D. Mac- 
don alh, B.N., F.B.S. Communicated by George Busk, Esq., F.B.S. , Sec. L.S. 373 
XXII. On the Nerve proceeding to the Vesicles at the Base of the Kalteres, and on the 
Sub-costal Nervure in the Wings of Insects. By J. Braxton Hicks, M.D. Bond., 
F.L.S. 
377 
XXIII. On Three Oaks of Palestine. By J. D. Hooker, M.D., F.B.S., F.L.S., 8fc. 381 
XXIV. On Fissicalyx and Prioria, tioo recently published Genera of Leguminosae . By 
George Bentham, Esq., Pres. L.S 
XXV. The Foot of the Fly ; its Structure and Action : elucidated by comparison with 
the feet of other Insects, 8fc— Part I. By Tuffen West, Esq., F.L.S. . . 393 
389 
