1893.] NATURAL SCIENCES OF PHILADELPHIA. 119 



PONTONIA Latreille, 1829. 



Conchodytes Peters, 1852. 



P. armata H. Milne-Edwards, 1837. 



Habitat. New Ireland and Cuba. 



344. (Id) Cuba. Guerin Collection. 



P. custos (Forskael, 1775). 

 Cancer custos Forskael, 1775. 

 Astacus tyrrhenus Petagna, 1792. 

 Alpheus tyrrhenus Risso, 1816. 

 Gnathophyllum tyrrhenus Desmarest, 1825. 

 P. tyrrhena Latreille, 1825. 

 Callianassa thyrrhenus Risso, 1826. 

 Alpheus pinnop lax Otto, 1828. 



Habitat. Mediterranean. 



177. (xa) Greece. Guerin Collection. 



TYPTON Costa, 1844. 



Pontonella Heller, 1856. 



T. spongicola Costa, 1844. 

 Pontonella glabra Heller, 1856. 

 T. spongiosus Sp. Bate, 1868. 



Habitat. Mediterranean. 



178. (la) Villa Franca, France. Dr. B. Sharp, 1882. 



HYMENOCERIDAE Ortmann, 1890. 

 HYMENOCERA Latreille, 1829. 

 H. latreillii Guerin (No. 367 type). 

 Habitat. Indian region. 



367. (Id) Agalega, Seychelles. Guerin Collection (type). 



PALAEMONIDAE Sp. Bate, 1887. 

 BITHYNIS Philippi, 1860. 



P. gaudichaudii (Olivier, 1791). 

 Palaemon gaudichaudii Olivier, 1791. 

 Palaemon coementarus Poeppig, 1836. 

 Bithynis longimana Philippi, 1860. 

 Macrohrachium africanum Sp. Bate, 1868. 



Habitat. Rivers of Chili and Peru. 

 98. (la) Chili. Guerin Collection. 

 359. (Id) Peru. Dr. W. S. W. Ruschenberger. 

 LEANDER Desmarest, 1849. 



L. adspersus (Rathke, 1837). 

 Palaemon adspersus Rathke, 1837. 



