NO. 2131. 



NEMATODE PARASITES OF RODENTS—HALL. 



33 



to 230 fi 

 iven for 



mating his figure of this. He also finds the female to be 140 

 thick, which figures are considerably in excess of those g 

 II. hepatica. In spite of these discrepancies I 

 have tentatively referred this species to //. 

 hepatica on the ground that further study of 

 live material may reconcile the discrepancies, 

 and present data are insufficient to warrant a 

 new species. Eggs from a worm possibly be- 

 longing to FI. hepatica were reported l)y Pei'- 

 roncito (1878) from the liver of a dog. 



Genus CAPILLARIA Zeder, 1800. 



Synonyms. — Tvichosoma Rudolphi, 1819; 

 Tinchosonhuirh Creplin, 1839; Calodiimi Du- 

 iardin, 1815. fiq. 36.— ?hepaticoi.a hepat- 



^ . 7. . m-i • / -irx\ ICA. Egg of trichosome 



Generic ctiagnosis. — Irichurinae (p. 19): ^^0^ livee of lepus 

 Body verv slender, capillary ; anterior esopha- europaeus. enlarged. 



, /. f 1 1 1 "i ii 1 After NicoLL, 1911. 



geal portion or body shorter than or rarely 



equal to the posterior portion of body. Bacillary band dorsal, ven- 

 tral or lateral, or absent. Esophagus long and slender, gradually 

 increasing in size posteriorly. Spicule long and slender, surrounded 

 by a sheath which may present a smooth outer surface when evagi- 

 nated or a surface armed with spines. Tail of male may or may not 

 be provided with membranous wings and a membranous bursalike 

 structure, these being usuall}^ inconspicuous when present. Vulva 

 located near the base of the esophagus. Eggs lemon-shaped, with 

 the usual opercular plugs. 



Type-species. — Capillaria tumida Zeder, ISOZ^^Trichosoma hrevi- 

 colle Rudolphi, 1819. 



ANALYTICAL KEY TO SPECIES OF CAPILLARIA. 



1. Recognizable species 2. 



Inadequately described or xindescribed species 5. 



2. Dorsal and ventral bacillary band present Capillaria bacillata, p. 34. 



No bacillary bands present, or, at least, none described 3. 



3. Spicules less than 1 mm. long ; worms in intestine Capillaria annulosa, p. 35. 



Spicules more than 1 mm. long 4. 



4. Worms in urinary bladder Capillaria schmidti, p 37. 



Worms in intestine Capillaria ransomia, p. 34. 



5. Females described 6. 



No description; nomina nuda 8. 



6. In urinary bladder Capillaria papillosa, p. 37. 



In digestive tract (apparently) 7. 



7. In Apodemus sylvaticiis (Mus sylvaticus) Trichosoma muris-sylvatici, p. 36. 



In Eliomys quercinus (Myoxus nitclla) Trichosotnum myoxi-nitclae, p. 36. 



8. In Mus musculus Trichosoma muris-miisculi, p. 37. 



In Arvicola atnphibius (Lemmus amphibius) Trichosomum lemmi, p. 37. 



10600°— Proc.N.M. vol.50— 16 3 



