No. 1. — DescriiJtions of New and Little-known Mcduscc from the 

 Western Atlantic. By Alfred Goldsborough Mayer. 



LIST OF SPECIES. 



SCYPHOMEDUS^. 

 Bathyluca Solaris, nov. gen. et sp. 



HYDROMEDUS^. 



Bougainvillia Gibbsi, nov. sp. 



Lymnorea borealis, nov. sp. 



Oceania carolinae, nov. sp. 



Oceania singularis, nov. sp. 



Octonema gelatinosa, nov. sp. 



Orchistoma tentaculata, nov. sp. . 



Stomotoca apicata, L. Agassiz. 



Stomotoca rugosa, nov. sp. = Stomotoca apicata, Fewkes. 



Syndictyon angulatum, nov. sp. 



CTENOPHOK^. 

 Mnemiopsis McCradyi, nov. sp. 



The Medusas described in the following paper were obtained by the 

 author as assistant to Mr. Alexander Agassiz in collecting new material 

 for a work upon the Medusa-fauna of the Atlantic Coast of North 

 America. The descriptions of Western-Atlantic Medusai herein given 

 will eventually be published also in the new edition of The North 

 American Acalepha? now in preparation by A. Agassiz and A. G. Mayer. 



Eight species are new; of these one is a Scyphomedusa, one a 

 Ctenophore, and six are Hydromedusoe. In addition to these there is 

 one Hydromedusa (Stomotoca rugosa) that we have redescribed under 

 a new name. 



VOL. XXXVII. — NO. 1. 1 



