Botany and Zoology. 129 
useum, which I have no doubt will soon be imitated by others.” ° 
9. Observations on the development of Raia Batis; by Jerrrizs 
Wyman, M.D., Herse rof. Anat. in Harvard College. 14 pp. 4to, 
From the Memoirs of the American Academy, vol. ix, pp. 
xlbag begun previously to the detachment from the ovary of the yelk 
Which is to occupy it. 
(2.) The embryo, before assuming its adult form, is at first eel-shaped, 
and then shark-shaped. 
Sra The embryo is for a short time connected with the yelk by means 
a slender umbilical cord; the cord afterward shortens, fie the young 
