NO. 1205. SYNOPSIS OF THE NAIADES— SIMPSON. 657 



tSOLENAIA IRIDINEA Heude. 



^ Mycetopus iridineus Heude, Jl. de Conch., XXII, 1874, p. 117; Conch. Flnv.Nank., 

 I, 1875, pi. VIII, fig. 19.— '^Fischer, Jl.de Conch., XXXVIII, 1890, p. 11.— 



* P.ETEL, Conch. Sam., Ill, 1890, p. 187. 



" Mycetopus similis Heude, Conch. Fluv. Nank., Ill, 1877, pi. xxiii, fig. 50. — 



* Fischer, Jl. de Conch., XXXVIII, 1890, p. 11.— *P.etel, Couch. Sam., Ill, 

 1890, p. 187. 



Chiua. 



SOLENAIA RIVULARIS Heude. 



* Mycetopus rivuJar'is Heude, Conch. Fluv. Nank., Ill, 1877, pi. xxiii, fig. 49. — 

 ^ Fischer, Jl. de Couch., XXXVIII, 1890, p. 11. 

 China. 



SOLENAIA CARINATA Heude. i 



*Mycetopus carinatus Heude, Conch. Fluv. Nank., Ill, 1877, pi. xxi, fig. 45. — 

 ^Fischer, Jl. de Conch., XXXVIII, 1890, p. 11.— * P^tel, Couch. Sam., Ill, 

 1890, p. 186. 



China. 



SOLENAIA RUGATA Sowerby. 



^Myeetopus rugatus Sowerby, Couch. Icon., XVI, 1868, pi. iii, fig. 7. — * Smith, Jl. 



de Conch., XXII, 1874, pi. iv, fig. 1.—* Clessin, Conch. Cab. Ano., 1876, p. 205, 



pi. Lxvii, fig. 4. — " PiETEL, Conch. Sam., Ill, 1890, p. 187. 

 'Platuis {Mycetopus) rugatus Lea, Syn., 1870, p. 90. 



Said to come from Victoria Eiver, Australia. I am a little in doubt 

 about the locality. 



(Group of Solenaia triangularis.) 



Shell short, rounded on post base; very narrow in front. 



SOLENAIA TRIANGULARIS Heude. 



"" Mycetopus triangularis Heude, Conch. Fluv. Nank., IX, 1885, pi. lxxii, fig. 138. — 



* Fisher, Jl. de Conch., XXXVIII, 1890, p. 11.— "P.etel, Conch. Sam., Ill, 

 1890, p. 187. 



China. 



Genus GONIDEA Conrad, 18S7. 



(Type, Anodonta randalU Trask, and Anodonta feminalis Gould.) 



Gonidea Conrad, Pr. Ac. Nat. Sci. Phila., 1, 1857, p. 165. 



Shell elongated, subtri angular, much narrowed in front, wide behind, 

 inflated, subsolid, usually with a high, sharp, posterior ridge; beaks 

 rather sharp but not high, the sculpture consisting of a few, strong, 

 concentric bars; epidermis rayless; hinge with a rudimentary pseudo- 

 cardinal and lateral in each valve, though these are sometimes wanting; 

 dorsal scars forming a row within the shallow beak cavity; muscle 

 scars irregular; palleal line with a trace of a sinus behind; nacre lurid 

 to purplish. 



'The type and only known shell is a fossil fragment. It may be a recent species. 

 Proc. ]Sr. M. vol. xxii 42 



