66 RESEARCHES IN HELMINTHOLOGV AND PARASITOLOGY. 



Charadcribus reformatis. Body cylindroid, broadly and strongly 

 anuulated. Tail long, spiculate, and inflexible. Mouth simple, 

 round unarmed. Female generative aperture posterior to the mid- 

 dle. Male with a single spiculate penis. 



I. Subgenus. Streptostoma, Leidy. Proc. A. N. S., IV, 230. 



Charadcribus reformatis. Annuli very broad, distinct, and few 

 in number. Mouth large, circular ; buccal organ (oesophagus) 

 and gizzard pyriform. Tail very long and ensiform. 



1. Streptostoma A^ile, Leidy. Proc. A. N. S., IV, 230, 



2. Streptostotna Cradle, L,eidy. Proc. A. N. S., V, 100. 

 Oxyuris Diesingii, Hammerschmidt. Isis von Oken, 1838, 354, 



Taf. IV, fig. VI. 



Oxyuris Blattce orientalis, Hammerschmidt. Naturwis. Adhandl. 

 von Haidinger I, 284, Tab. X, Figs. 4, 7, 13-15. 



2. Subgenus. Thclastoma, Leidy. Proc. A. N. S., IV, 231. 



C/iaraderibiis rcformahis. Annuli few in number, broad. Oral 

 annulus papillaform. Mouth small, circular ; buccal organ long, 

 cylindrical ; gizzard pyrifoim. Tail spiculate, moderately long. 



1. Thclastoma Attemiatum, Leidy. Proc. A. N. S., IV, 231. 



2. Thclastoma Apbendiculatum , Leidy. Proc. A. N. S., V, loi. 

 Oxyziris Blattce oricntalis, Hammerschmidt. Naturw. Abhandl. 



von Haidinger, I. 284, Tab. X, Figs. 10-12 (8, 9, 20?). 



3. Thclastoma Labiatiim, Leidy. Proc. A. N. S., V, lor. 



4. Thclastoma Robustum, Leidy. lb., V, loi. 



5. Thclastoma Brcvicaudattajt, Leid3^ lb., V, 208. 



The larva of a laniellicorn insect, from which this species was 

 obtained, Dr. J. L. Le Conte informs me, belongs to Scarabcus 

 rclidus. 



6. Thclastoma Gracilc, Leidy. 



Oxyuris gracillis, Hammerschmidt. Naturw. Abh. v. Haidinger, 

 I, 287, Tab. X, Figs. 21-25. 



7. Thclastoma Dilatatum, Leidy. 



Oxyuris dilatata, Hammerschmidt. lb., I. 287, Tab. X, 26, 27. 



Thclastoma Laticollc, Leidy. 



Oxyuris laticollis, Hammerschmidt. lb., I, 288, Tab, X, 28-34. 



LUMBRICULUS, GrUBY. 



Accstus, Leidy. Proc. A. N. S., V, 226. 



Charadcribiis reformatis. Body filiform, cylindroid, hyaline. 

 Podal spines in 4 rows, in fasciculi of 2 to 5, furcate. Upper lip 

 simple, conoidal. Girdle none. Eyes none. Blood bright red. 



