is 
71 
ely a asinele cell ; = an earliest phases of its development 
* 
ed forwards, must be regarded as of a lowefigype than those whieh 
have one directed beck wnedés as, for oo pelicans and cor- 
morants among water birds, and the gen /yp. among swallows. 
From the result of his examinations of a embryos of birds, Pr rof 
had recently, before a scientific society, ventured to predict tha 
afier, among the higher mammalia, the foot of the embryo 
the same way be found to-be webbed, like thatof the seals and | 
en figured as existing in the human embryo, but its 
is ‘had not been nen noticed. = 
can an yster-catcher, (ibid, p.43.)— 
tatement of the comparative measuremen 
and European. oysier-catcher. is ob er 
opinion of the distinctness of = two speci 
— confounded with each o 
a 
3 
S 
Qe 
3 
oO 
ed a, 
= 
3 
— 
= 
oO 
hich have sometimes 
amasoy us palliatus, | Hematopus ostralegus. 
nale. Bae Fema inches. 
Length from tip of bil to tip ‘of tail a 
36 
fie ek of tongue. : get dag eee. ra 
ophagus lo proventriculus . os weer: i 7 
Proved rteulgeag length” ; ; : ‘ 1} 
Intesti nes to vent* a, ae : 40. : : ‘ 59 
ca ent Hs ged, agg ap cM et 24 from vent. . "3 
' Length ca 5 ; ee: 9: aie “44 
Trachea to bronchi |. ae. ‘ Se 4Y6 
Keel of sternum in depth not quite 1 : 
‘ 9 ‘ a 24 ae - rs 
st logical | aay (Jameson’s Jour., 
t number of the British and Foreign 
p. 194.)—In he lai 
Medical Review, edited by Dr Bi rbes, a distinguished physiologist has 
| to por. Martin. Barry’s important physi- 
“The writer of the remarks in. question, after shewing the impor- 
tance of the combination of anatomical and era investigations 
with zoological pie states that M. Milne Edwards,.in several of 
his later Memoirs, ven adopted the principle, that embryology 
‘condition the e ies ts of all animals is the same ; 
differ accord according to the sub- ‘kingdom to which ismlongy w 
ode. — minute remnant of vitelline duct eiail at 134 ag from an 
key i Ser., Zool., tome i, p- 
"heey Szrizs, Vol. VI, No. 18. —Nov., 1848. 
