171 
30. Description of two new genera of North Ame¬ 
rican Fishes, Opsanus and Notropis. 
31. Second decade of New North American Fishes. 
Perea mucronata. Exocetus rubescens. 
- notata. Callionymus pelagicus. 
Petromyzon leucopterus . Clupea sapidissima. 
Phycis marginatus. - megalops , 
Sparus erythrops . neglecta. 
31. Third decade of new North American Fishes. 
Malus microcarpa. JVeottia plantaginea . 
Prunus rupeslris .- lacera. 
Spirea obovata. Stellaria montana. 
Euphorbia vermiculata . - - tenella . 
Er/uisetum rnontanum . Juniperus depressus. 
/ 
And the following Tracts will be published in the 
course of 1818. 
Fourth, fifth, sixth, seventh, &c. decades of new 
North American plants. 
Description of several new genera of North Ame¬ 
rican fishes, Cheilobus , Miniculus , Polyprion , &c. 
Descriptions of 25 new species of North American 
snakes. 
Description of 16 new species of turtles, lizards, 
and salamanders, from the United States. 
Synopsis of 20 other new American species of the 
genus Aphis . 
Fragments on the Marine Zoology of Sicily. 
