68 The American Naturalist. [January. 



Unarmed Hymenolepis, i. e. Adult without hooks. 



H. relicta Zschokke,IMus decumanus |Cercocystis ! Asopia farina! 



1 >.v\ 



Rinl., M. decuraanus 



ivn. Taenia diminuta; 

 Eud., 1819. 

 T. leptocephala Crep- 



lin, 1825. 

 T. flavopunctata 



Weinland, 1858. 

 T. varesina Erm 



Parona, 1884. 

 T. minima Grassi, 



M. musculo* 



M. alexandrii 





IScaurus stnatus 



scattered through the parenchym. Most of the species of this group 

 are parasites of birds, D. {Taenia) madagascariensis however is para- 

 sitic in man. 3, Ophryocotyle Friis, 1869. Rostrum absent, infundi- 

 bulum present, its border armed with several rows of small hooks. 

 Several transverse rows of hooks on the suckers. 



Thesubfamile Anoplocephalinae R. Bl., '91, cont in tie nai ed 

 Taenia? found in herbivorous animals, segments wider than long, egg 

 with pyriform apparatus, 3 genera. 1, Bertia, R. Bl., '91, genital 

 pores irregularly alternate, etc., 2 species, found in primate anthro- 

 poides, (Mem. cit. p. 186-196). 2, Moniezia, R. Bl., '91, two genital 

 pores to each segment, etc., (Bui. cit. p. 444) contains 11 species many 

 of which are important to economic zoology: M. {Taenia) expansa 

 and M. {T.) denticulata of sheep and cattle, etc. 3, Anoplocephala 

 Em. BL, 1868, sexual pores unilateral, etc., contains 2 species: A. 

 {Taenia) mamillana and A. {T.) perfoliata of the horse, etc. 



In the same publication R. Blanchard treats more minutely several 

 species of the genus Moniezia found in rodents and gives some shorter 

 observations on various Distomes.— C. W. Stiles. 



Nematodes.— Willach (Arch. f. w. u. pr. Thierheilkunde, 1891, p. 

 340-346) describes a new and dangerous parasite, found in nodules of the 

 colon of Maeacus cynomolgus. This helminth, which receives the name 

 of Sclerostoma apiostomum, proved fatal in two out of three cases ex- 

 amined. Stiles (Sur la Dent des Embryons d'Ascaris ; Bull. d. 1. Soc. 

 Zool. d. France, 1891, p. 162) claims that the so-called "boring tooth" 

 found in embryos of Ascaris lumbricoides is composed of three part?, 

 each of which corresponds to a lip of the adult Ascaris.— C ^ • '- 



