284 HAROLD HEATH. 



tance before the rectum is reached, and appears in whole mounts 

 to be differentiated into a definite intestine, sections show that 

 this same glandular epithelium extends from oesophagus to rec- 

 tum. This latter structure is characterized by longitudinally 

 folded walls lined with cuticle and provided near the anal opening 

 with a strong sphincter muscle. 



The nervous system is free from the ectoderm and is con- 

 structed upon the usual gephyrean plan. Posteriorly the nerve 

 cord terminates in a slight enlargement, as noted by Mingazzini, 

 and on the other hand, after following the body wall to a point 

 close to the pharynx it bends inward and in the neighborhood of 

 the duct of the ventral glands bifurcates to form the oesophageal 

 collar. The course of these connectives in two or three sections 

 is difficult to follow, owing to their small size and the abundance 

 of connective tissue and muscle fibers, but the plan shown in 

 the figure is probably not far astray. The bilobed brain is very 

 distinct in both sections and in whole mounts, but it has been 

 impossible to trace any nerves from it with the exception of the 

 connectives. 



The kidneys are two in number and consist of short coiled 

 tubes opening to the exterior. I have examined these organs 

 with much care but have failed to find that they have any internal 

 opening. In every case the two extremities are in close contact, 

 but the glandular portion includes the distal extremity, apparent- 

 ly, and if any inner pore does exist it is minute and not a well- 

 developed nephrostome. The gland cells are fairly well defined, 

 more or less vacuolated and contain considerable quantities of 

 a finely granular secretion. In the neighborhood of the pore the 

 glandular elements disappear, the canal becomes of much smaller 

 caliber and after a short, sharp twist opens to the exterior. 



The fatty substance described by Mingazzini is lacking in the 

 present specimens, though in all probability this may be a variable 

 feature. Also no trace of sex cells has been found, and there is 

 therefore no reason to consider this an adult form so that a 

 generic name is uncalled for as Spengel maintains. 



I 



