ON EPIGNATHUS 



II 



cavity is surrounded by lips, which are covered on their outer aspect 

 by normal skin, and on the inner by a stratified mucous membrane. 

 No striped muscle fibre is seen in the lips. 



There is an irregular hard palate covered by mucous membrane, 

 and attached to it, and filling up the cavity of the abortive mouth, are 

 nine stalked bodies, from the size of a bean to that of a pigeon's egg. 



Abortive heart. — One of these bodies is much larger than the others, 

 and has the appearance of a foetal heart (Fig. 5). This measures 22 mm. 

 in length, 12 mm. transversely, and 7 mm. from before back, and is 

 attached by a stalk about 6 mm. in diameter. The anterior wall is quite 



Fig. 6.— Abortive umbilical cord, with two large blood-vessels, attached to deformed hard 

 palate of Epignathus. (Natural size.) 



thin, and a slit made in it opens into a flattened cavity. The cavity 

 is triangular in shape, has a slightly ridged appearance, and leads up into 

 a vessel with a lumen about 2 mm. in diameter. An incision made 

 through the posterior wall opens into another ventricle-like cavity. The 

 posterior wall is from 2 to 3 mm. thick. The interior of this cavity 

 is more ridged and irregular, and from it there also passes a thin walled 

 channel. There is a thin septum between the two cavities, but it is 

 not quite complete at its base. 



(185) 



