Worm Parasites 69 



Sfrongylus. Worms of this genus have not been found in any other 

 animals in this collection. 



Matrix sipedon (Linn.) : Water Snake. Nine large snakes were 

 examined and seven were found to be badly infested with parasitic 

 worms. Two snakes contained no parasites. 



Six of the snakes contained large Nematodes in their stomachs 

 belonging to the genus Ascaris, the length of which was from 50 to 

 150 mm. In five of these snakes from two to thirty worms were 

 present in each one and the sixth snake contained an extraordinary 

 number of them, its stomach being packed full. Some of the worms 

 had pierced the stomach wall, the head and tail of the worm pro- 

 jecting into the stomach while its middle portion was imbedded in 

 the tissue of the wall. 



From the stomach of one of the snakes which contained none of 

 the Nematodes just mentioned were obtained five Acanthocephala, 

 (Vial No. 136) belonging to the genus P omphorhynchiis. The length 

 of the worms was about 5 mm. Worms of this genus were also 

 taken in the golden shiner and the calico bass in Oneida Lake. 



Two species of Trematodes were obtained. One of these species 

 was taken in the anterior portion of the oesophagus of two of the 

 snakes, four being taken from one and eight from the other. They 

 are elongate worms, measuring about 12 mm. long and 1.5 mm. broad, 

 when compressed and preserved, and belong to an undescribed genus 

 of the subfamily Reniferinae. One of these same snakes also har- 

 bored in its stomach a single distome, 5 mm. long and .75 mm. wide 

 when preserved, belonging to an undescribed genus of the family 

 Azygidae. 



Two species of Cestodes were found in three snakes : in two snakes 

 they occurred in the intestine and in another snake in the rectum. 



Rana pipiens (Scherber) : Leopard Frog. Twelve frogs were 

 examined, in one of which, a half-grown animal, no internal parasites 

 were found. All of the others but one contained Trematodes in the 

 lungs, belonging to the genera Pneumonoeces and Tneumobities, the 

 number of worms in the lungs of any one frog varying from one to 

 nineteen, the average being eight. Six frogs contained Trematodes 

 in the urinary bladder belonging to the genus Gorgoderina, the num- 

 ber in a single frog being one or two, with the exception of one frog 

 in which eight were found. 



Seven frogs contained Nematodes. In one frog the worms were 

 in the body cavity ; in four frogs they were in the lungs ; in one frog 

 in the intestine and in one frog in the rectum. These worms were 

 of three different species, all belonging to the family Ascaridae. 



No Cestodes or Acanthocephala were taken in the frogs examined. 



Parasites of Mollusks, Six species of Pelecypoda, including 14 

 individuals were examined, and no internal parasites were found in 

 any of them. In Lampsilis Iitteolal (Lamarck) from one to four 

 Hydrachnids, belonging to the species Unionicola aculeata (Koenike) 

 were found between the gills of each individual examined. 



