IV STROPHOCHEILUS. 



Genus CYLINDRUS Fitz. 



Family ACAVID^E Pilsbry. 



Macroogona Pils., Man. Conch, ix. Additional species are de- 

 scribed in xiii, pp. 122-126. 



Subfamily STROPHOCHILIN.E. , 



This group differs from the Bulimulidce by the long kidney, ab- 

 sence of a tubular ureter, copious venation of the cardiac side of the 

 lung ; the solid, smooth jaw, etc., etc. Suitable description and 

 illustration of the soft anatomy of the group would occupy undue 

 space in the Manual, and will be given elsewhere; but as Gonyosto- 

 mus has been associated hitherto with Bulimulince it has been 

 thought best to include some account of its anatomy here, in order 

 to fix the position of the group. 



Two genera of this subfamily are known, Strophocheilus and 

 Gonyostomus. 



Genus STROPHOCHEILUS Spix. 



Man. Conch, x, p. 1. The genus as constituted in vol. x requires 

 some restriction, the group Thaumastus proving by its soft anatomy 

 to belong to the family Bulimulida. 



Subgenus STROPHOCHEILUS s. st.r. 



S. pudicus Mull., xiv, p. 116. S. calus Pils., xiv, 119. 



almeida Spix. S. unidentatus Sowb., x, 9. 



S. planidens Mich., x, 7. S. erythrosoma Pils., x, 10 ; xiv. 

 S. rhodocheilus Rve., x, 8. 117. 



S. pilsbryi v. Iher., xiv, 118. pudicus Pfr. 



S. milleri Sowb., x, 8. S. (?) conlortuplicatus Rve., x, 71. 



v. kronei Iher., xiv, 118. 



v. iguapensis Pils., xiv, 119. 



Subgenus BORUS Alb., 1850. 



Man. Conch, x. pp. 10, 194; xiv, p. 120. Distribution, tropical 

 and temperate South America. 

 S. popelairianus Nyst, x, 13. S. maximus Sowb., x, 15. 



v. thammianus Mart., x, 14. v. kremnoicus Orb., x, 16. 



v. dohrnianus Mart., x, 14. S. huascari Tschudi, x, 16. 



v. connectens Mart., x, 14. 



