1036 General Notes. [Nov. 
and the method of infolding of the medullary groove is, how- a 
ever, characteristically amphibian, At the posterior end of the 
embryonic area the furrows characteristic of the Amphibia ap- 
formed by Prof. Scott, of Princeton. 
The cranial flexure is profound, and at times the head is well 
differentiated, the branchial clefts and visceral arches are devel: 
oped with great distinctness, so that from the side the head pre- 
sents, at this stage, an appearance which is decidedly like that of 
an embryo of a bird or a mammal. The last remnants of the 
yelk are not absorbed below the cardiac region as in Teleosts, 
but the yelk-sac is carried far back, so as to occupy a position 
in front of the vent. In this respect there is a resemblance to 
the mode in which the last remnant of the yelk is absorbed in 
the Marsipobranchs, on which account the writer has called the 
latter opisthotrophous in reference to this peculiarity. The em- -2 
bryo is also folded off from the yelk somewhat in the same 
, 
scribed by C. Vogt many years ago. 
_ The embryo also becomes coiled up in the ovum, and thea, 
some time before its escape from the egg, three beautiful pore 
or pinnate branchial processes grow out from either side in te 
region of the posterior branchial clefts. These are compare eh 
the plumose branchiz of the larve of Megalobatrachus japn 
from Japanese figures. An amended figure of the larva of Lyp pa 
nectes compressicauda, another Ccecilian, is also binds oe 
account of Peters, which was based on the same ma ie 
rected. The Sarasins find that the single pair of brana te 
Typhlonectes are not vesicular, as supposed by Peters, but leal- es 
Another singular feature which the memoir reveals 15 the (ie : 
ence of vertical tail-folds on the tail of the larve of Ichthyog he 
these extend forward to the vent, and back over the en a ee 
tail, and forward over the dorsal side a little in advance ° . 
tical line from the anus. ae l 
Still more remarkable is the development of a ate ade 
mentary limb-buds, representing the hind limbs, On ences 
of the vent, or cloaca. These afterwards undergo à, erg he” 
metamorphosis. The occurrence of a vertical tail-fold tix 
opm t R D 
structures in adult Urodeles, such as Triton, while the aog i. 
limb-buds prove beyond question that these singularly ended . 
burrowing and worm-like amphibians are undoubt ily is oe 
from types which possessed well-developed ambulatory ' 
__ as proposed by Cope. 
