CONUS ARTERIOSUS IN TARPON ATLANTICUS. 151 



cardium to the distal valve will be similar to that generally found 

 in teleosts. An interesting transitional stage can be seen in the 

 heart of Dorosoma cepediamtm, where there is an extremely thin 

 but distinct streak of connective tissue projecting into the myo- 

 cardium for sufficient distance .to clearly separate the areas of 

 original conus and original ventricle. 



PHILADELPHIA, 

 October, 1906. 



LITERATURE CITED. 

 Boas, J. E. V. 



'80 Ueber den Connus Arteripsus bei Butirinus und bei anderen Knockenfischen. 



Morph. Jahrb., Bd. 6, p. 527. 

 Gegenbaur, C. 



'66 Zur vergl. Anatomic des Herzens. Jenaische Zeitschrift, Bd. 2, p. 365. 

 Hoyer, H. 



'oo Bulletin international de 1'academie des Sciences de Cracovie, No. 7, 1900, 



p. 263. 

 Mueller, J. 



'46 Ueber den Bau und die Grenzen der Ganoiden. Berlin, 1846. 

 Stannius. 



'46 Berraerkungen tiber das Verhaltniss der Ganoiden zu den Clupeiden, insbe- 

 sordere zu Butirinus. Rostock, 1846. 



