ASCARIS OSCULATA. 



157 



anatomy and histology of the intestinal tract and glands; the excretory pore is found 

 closely back of the ventral intermediate lip. 



Von Linstow (1895, pp, 528-531) contributes an histological discussion of some 

 portions of the worm; he believes that Bastain's (1866) specimens were probably 

 A. decipiens rather than A. oseulata. 



' Stossich (1806, pp. 37, 38) gives a short diagnosis of the worm, including Ascaris 

 bulbosd Oobb (see p. Ill) as synonym. 



In Leidy's collection we find a bottle (N"o. 259=U.S.N.M., No. 5051) containing 

 mematodes with the label ^^ Ascaris osonlata, Macrorhinus angustirostris, Dr. Chapman," 

 which we cited in a former publication (Stiles & Hassall, 1894, p. 340.) We have as 



yet been unable to find where Leidy published this determination, or whether he 

 published it at all. A reexamination of the parasite has resulted in changing the 

 determination to Ascaris decipiens (see p. 112). 



Since finishing this report we have received several bottles of parasites from the 

 Vienna Museum, which we have examined with the following results: One bottle 

 labeled "Ascaris osculata, Phoca barbata" contained both A. osculata (B. A. I., No. 

 2831) and A. decipiens (B. A. I., No. 2841). One bottle with label "Ascaris osculata, 

 Phoca vitulina" we have redetermined as A. decipiens (B. A. I., No. 2832). A bottle 

 (B. A. I., No, 2833) labeled "Ascdris osculata, Leptonyx monachus^^ is correctly 

 determined. A bottle (B. A. I., No. 2834) labeled "Ascaris osculata, Phoca pantherina^^ 



