Science, which opened its sessions at Dubuque, on August 21st (or 23d), 

 of which an abstract has, after great delay, appeared in the American 

 Naturalist for March, 1873. Finally a description of Eobasileus appeared 

 in the scientific column of the "New York Independent" for August 

 22d, 1872.* The papers published in Philadelphia were issued without 

 my revision, and hence contain a few typographical errors which Prof. 

 Marsh finds of great use to himself. But under" the circumstances the 

 number is surprisingly few. 



I now present a table of the nomenclature of the three genera of Pro- 

 boscidia, synonymy being in italics : — 



MONTH. 



AUTHOK. 





Lie id y. 



Cope. 



Marsh. 



August, 1872. 

 1st. 



Uinta therium 

 described with one 

 species. 

 Uintamastix do. 







19th. 

 20th. 





Loxolophodon 

 described with 

 three species, f 



Eobasileus de- 

 scribed and one 

 species. 



Tinocevas used in 

 erratum, not de- 

 scribed : no species 

 described. 



22d. 





Loxolophodon 

 again described 

 with three species. 





24th. 







Tinocei-as named ; 

 no description. 



September. 



21st. 







Tinocevas dessrib- 

 ed with one species 

 described. 



27th. 







Dinoceras describ- 

 ed with two species. 



Though Prof. Marsh has published five papers and six notes on these 

 animals, but one of his species has been so far partially described as to 

 be of any use fo science. Publishing of bare names:): may constitute a 

 caveat, but not an injunction, but in the present case the dates are too 

 late. Hence the trouble. " Heu quantus erat sudor," etc. 



In one of Prof. Marsh's late catalogues, he asserts that Loxolophodon 

 comutus and Tinoceras grandis are identical. If this be true, the latter 



* Not having the number at hand, I write from a loose note. 



tin this communication the name Loxolophodon was misspelled Lefalophodon. As Prof. 

 Marsh finds some difficulty in adopting the former name , I can accept the latter , should he in- 

 sist on it. 



% See the rule "adopted and practiced by most students. In case of a genus there must be a 

 definition giving the essential characters. " From "Thorell's European Spiders, " quoted in 

 Wallace's Address before the Entomological Society, London, and by W. H. Edwards in 

 * ' Entomological Nomenclature "in " Canadian Entomologist, ' ' 1873, p. 32. 



