94 SoLtitas—On the Origin of Freshwater Fuunas. 
Mo.iusca—continued. Cumingia, 0. Mm. 
Lucinacea, 0. M. Rangia, 0.m. 
Cyprinacea, f.m. Mactra,t Ff. m. 
Sinupalliata. Trigonella, 0. m. 
Veneracea, fm: Vaganella, 0. mM. 
Myacea, 0. m. Lutraria, 0.m. 
Pholadacea, 0. M. Cyprinacea. 
Heteromya. Tridacna, 0. m. 
Mytilacea, fim. Chama, 0. m. 
Mulleracea, fa: Dimya, 0. mM. 
Monomya. Diceras, 0. mM. 
Aviculacea, 0. Mm. Isocardia, 0. Mm. 
Ostreacea, 0. M. Hippopodium, 0. m. 
Veneracea, Cardium, Sf. m. 
Cypricardia, 0. Mm. Corbicula, Sf. est. 
Tapes, 0. M. Cyrena, Sf. est. 
Cyclina, 0. mM. Cyclas, f. 0. 
Cytherea, 0.m. Pisidium, - 0. 
Chione, 0. M. Cyprina, 0.7m. 
Venus, 0. Mm. Mytilacea. 
Lucinopsis, 0. m Mytilus, 0. mM. 
Sanguinolaria, 0. M. Modiola, 0. Mm. 
Psammobia, 0. M. Crenella, 0. M. 
Tellina,* fm. Lithodomus, 0. M. 
Donax, 0. M. Dreissena, fo0: 
Scrobicularia, m. brackish. Modiolarea, 0. mM. 
CRUSTACEA. 
Branchiopoda. Cirripedia, 0.m. 
Phyllopoda, 0. Mm. Ostracoda, f.m. 
Cladocera, I. 0. 
Malacostraca. Cheetopoda. 
Nebaliade, 0. M. Acheeta, fio. 
Schizopoda, 0. M. Polycheta,t 0. Mm. 
Decapoda, fim. Oligocheeta, f.0. (afew exceptions). 
anaes 4 2 Platyhelminthia. 
Edriophthalmata, fim. Turbellaria, fm. 
Copepoda. Nemertina, o.m. (one exception). 
Eucopepoda. fim. Trematoda, m. fo 
Branchiura. ifs Cestoida, 
* A sub-genus, Galatea, is found in rivers of Africa; otherwise marine. 
+ A sub-genus, Gnathodon, lives in fresh water, Gulf of Mexico. 
t A single exception (Lumbriconereis) has been recorded by Dr. Kennel as living in fresh water in 
the river Ortoire, Trinidad. 
