26 Charles Russell Bardeen 



readily be followed. The ganglia of the ninth and tenth nerves 

 are present on the right side only and are rudimentary. Rudi- 

 mentary spinal ganglia are present except where the left side of 

 the spinal cord is defective. No nerve fibers can be distinguished. 



Alimentary Canal — Lips and beak are differentiated, though 

 abnormal in form. Section a passes through the lower jaw and 

 lower lip. The oral opening into the pharynx is large. The inter- 

 nal gills are irregularly developed and contain no blood vessels. 

 The oesophagus is patent and extends to the left into a thick- 

 walled stomach. In the latter part of its course the lumen is di- 

 vided into three flues, all of which open into the stomach (sections 

 e and /). The tracheo-pulmonary process is short, does not branch 

 and has a slight lumen. The liver is developed posterior to the 

 region of the heart and ventral to the stomach (section /). A few 

 blood corpuscles can be seen in the much dilated capillary spaces 

 of the liver. The pancreas is developed on the left side of the body 

 posterior to the stomach. It consists of columns of cells. From 

 the stomach the gut passes into an irregular group of coiled 

 intestines, situated well on the left side of the body in the anterior 

 region of the body cavity (section e), but in the middle more pos- 

 teriorly (sections / and g). The hind gut is greatly distended. 

 The anus seems to be occluded. The epithelium over the anus 

 extends outward with irregular branching processes. 



Circulatory System — The heart is occluded and contains no 

 blood. The only blood vessels clearly distinguished are a por- 

 tion of the dorsal aorta, the mesenteric artery, and a few venous 

 sinuses in the liver. In these vessels a few blood corpuscles are 

 scattered about. 



Genito-Urinary System — The tubules of the pronephros are 

 much dilated. There are a few glomerular tufts but these con- 

 tain no blood vessels. The Wolfian tubules are abnormally 

 dilated (sections f, / and g). 



Skeleton and Connective Tissue — The connective tissue is in 

 most regions excessive in amount. Pigment cells are irregularly 

 scattered about. Most of the cartilages of the head seem to be 

 present but the tissue is not thoroughly differentiated and there 

 are some abnormalities of form. The auditory capsule is not 



