1893.] NATURAL SCIENCES OF PHILADELPHIA. 123 



94. (8a) San Domingo. W. M. Gabb. 



95. (4a) No locality. Smithsonian Institution. 

 287. (Id) Brazil. Dr. T. B. Wilson. 



356. (Id) Cuba, West Indies. Dr. Spackman. 



357. (Id) No locality. No donor's name. 

 1001. (2a) Kingston, Jamaica. W. J. Fox, 1891. 



P. lar Fabricius, 1798. 



P. longimanus Fabricius, 1798. 



P. ornatus Olivier, 1811. 



P. vagus Heller, 1862. 



P. equidens Heller, 1862. 



P. reunionensis Hoffman, 1874. 



P. mayottensis Hoffman, 1874. 



P.madagascarensis Hoffman, 1874. 



Bithynis ornatus Sp. Bate, 1887. 



Bithynis lar Sp. Bate, 1887. 



P. ornatus var vagus De Man, 1891. 



Habitat. Indo-Pacific region. 



97. (4a) Navigator Islands. Dr. W. S. W. Ruschenberger. 

 353 & 355. (Id & Id) Mauritius. Guerin Collection. 

 96 & 181. (8a & la). No locality. No donor's name. 



P. mexicanus Saussure, 1858. 

 P. dasydactylus Streets, 1871 (No. 89 type). 

 P. sexdentatus Streets, 1871 (No. 113 type). 



Habitat. Rivers of Mexico and West Indies. 



89. (2a) Coatzacoalcos River, Mexico. No donor's name (Streets' 



type of P. dasydactylus.). 



113. (3a) Coatzacoalcos River, Mexico. No donor's name (Streets' 



type of P. sexdentatus.). 



P. ohioensis S. I. Smith, 1874. 

 P. sallei Gue>in, mss.(No. 86 type). 



Habitat. Ohio and Mississippi Rivers. 



80. (xa) Vicksburg, Mississippi. L. C. Rice. 

 86. (2a) Mississippi River. Guerin Collection (Guerin's mss. 

 type). 



P. olfersii Wiegmann, 1836. 



P. spinimanus H. Milne-Edwards, 1837. 

 Bithynis spinimanus Sp. Bate, 1887. 

 P. cubanus Guerin, mss. (No. 182 type). 



Habitat. Rivers of tropical America and of West Africa. 

 121. (la) No locality. No donor's name. 



