62 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 81 



SPIROXYS AMYDAE Cobb. 1928 



In spite of one important difference between my material and 

 the original description of this species a number of parasites from 

 the stomach of Amy da ferox are referred to it. Cobb (1928) states 

 that there are only four teeth on each lip (" eight odontia in the 

 phai-ynx"), while all my material plainly shows six teeth on each 

 lip. But since Cobb has stated that his material was both immature 

 and poorly preserved, and since both lots of material are from the 

 same host, it seems probable that this difference is due to the condi- 

 tion of the type material. 



Family TRICHINELLIDAE Stiles and Crane, 1910 

 Subfamily Trichurinae Ransom, 1911 



Genus CAPILLARIA Zeder. 1800 



This large and cosmopolitan genus has species parasitic in all the 

 principle vertebrate groups, but in North American reptiles and 

 amphibians only a single form, G. recurva from the American croco- 

 dile, has been reported. The following account adds two new species : 



CAPILLARIA SERPENTINA, new species 



Plate 5, Figures 9, 10 



SpecifiG diaffnosis. — CapiUaria: A slender, white worm, with an 

 imstriated cuticula. The females are 12 to 14 mm long and 88/t to 

 103/* wide (no males were found). The esophagus is 4 or 5 mm long 

 and runs for the greater part of its length through the usual row of 

 circular cells. These cells are peculiar in that some are clear and 

 others are crowded with many fine granules. The clear and granu- 

 lated cells occur in alternating groups composed of two to five cells 

 each. The anterior 0.5 to 0.6 mm of the esophagus is not encircled 

 by cells. Presumably the nerve ring occurs in this region, but it 

 could not be located, even with the use of an oil immersion lens. The 

 intestine narrows rather suddenly at the beginning of the rectum, 

 which is about 0.5 mm long. The anus is terminal and opens be- 

 tween two liplike protuberances, of which the ventral one is the 

 smaller. 



The genital system is of the usual type for the genus, with the 

 vulva a short distance posterior to the posterior end of the esophagus. 

 Only the eggs call for additional comment. They have two shells, 

 the outer of which seems to be membranous and somewhat wrinkled. 

 The inner one, which is much heavier, contains the usual plug in 

 the end and seems to be slightly constricted at the middle. Both 



