86 TJ. S. NATIONAL MUSEUM BULLETIN 212 



6. Last tergite prolonged into a projection which surpasses the anal valves. 



Urochordeumidae (p. 107) 

 Last tergite not thus prolonged 7 



7. Collum enlarged, partly covering the head Rhiscosomididae (p. 105) 



Collum not enlarged, head entirely exposed 8 



8. Gnathochilarium with mentum divided, the promentum distinctly set off; second legs 



of seventh segment of male hamate, the second joint robust; male gonopods with a 



distinct pair of coxal processes Cleidogonidae (p. 89) 



Gnathochilarium undivided, promentum not set off; second legs of seventh segment of 

 male clavate, the second joint slender; gonopods without coxal processes. 



BACTROProAE (p. 86) 



Family BACTROPIDAE Chamberlin and Hoffman 



Bactropidae Chamberlin and Hoffman, 1950, Chicago Acad. Sci. Nat. 

 Hist. Misc. No. 71, p. 6. 



Genus BACTROPUS Cook and Collins 



Bactropus Cook and Collins, 1895, Ann. New York Acad. Sci., vol. 9, 



p. 53. 

 Generotype: Bactropus conifer Cook and Collins, by monotypy. 

 Range: Indiana. 

 Species: One. 



Bactropus conifer Cook and Collins 



Bactropus conifer Cook and Collins, 1895, Ann. New York Acad. Sci., 



vol. 9, p. 54, figs. 172-176. 

 Type: U. S. Nat. Mus. (No. 43). 



Type Locality: Bloomington, Monroe County, Indiana. 

 Range: Known only from type locality. 



Family BRANNERIIDAE Cook 

 Branneriidae Cook, 1896, Brandtia, No. 2, p. 8. 



Genus BRANNERIA Bollman 



Branneria Bollman, 1893, U. S. Nat. Mus. Bull. 46, p. 158. 

 Generotype: Craspedosoma carinatum Bollman, by original designation. 

 Ra.nge : Central United States. 

 Species: One. 



Branneria carinata (Bollman) 



Craspedosoma carinatum Bollman, 1888, Ann. New York Acad. Sci., vol. 



4, p. 109. 

 Branneria carinata Cook and Collins, 1895, Ann. New York Acad. Sci., 



vol. 9, p. 33 (redescription) . 

 Type: Present location unknown. 

 Type Locality: Beaver Creek, Jefferson County, Tennessee. 



