THE PROPER NAMES OF BDEELOSTOAIA OR TTEPTA- 



TREMA. 



B}' Theodore Gill. 



Honorary Aiiitocioff in /oo/ogi/. 



The Jlyperotretes with seven and six lateral Ijraiu'hial apertures have 

 been generally designated of late ^^ears as the genus BcleUostonta. This 

 name was proposed by Johannes Miiller in 1834. Long before this 

 name was proposed, however, no less than four others, or, inehKling 

 orthographical modifications, eight others, had been proposed for the 

 same type. I have long used Jlepfatrema^ but had casually referred to 

 a name {Hoinea) proposed by Fleming, Mr. Garman, not knowing the 

 original notices of the previous names, felt compelled to assume that 

 Iloirua was the first published and adopted it. With laudable caution, 

 however, he made the proviso that "unless it can be shown that there 

 was use of the nam^ Tleptatren^d previous to 1822 it will have to give 

 way to Homed.''' President Jordan and Mr. Snyder had also adopted 

 that name, but the alternative l)v no means follows. The real history 

 of the nomenclature of the genus, therefore, seems to be urgently 

 demanded and I now give the facts known to me for many years, but 

 not published. I Unfortunately the name I fcpfatr em a w'lW hay ^ io be 

 given up, if the current view that the generic name must he clothed 

 in a Latin garb is strictly adhered to. 



I. 



In ISIS, Cloquet ^ gave an article on Ci/e7osfo?nes, in which he 

 summed up his conclusions in the following dichotomous table: 



FamiUe drs CvcIosfovn'!<. 



Levres 



tentaoukV:? ; trous (les|deux, ventraux Mvxine. 



branciiiew an nombre de\8ept, lateraux F.ptatrenie. 



fdentee Lamproie. 



sans palpes ni tentacnles; bonehe \ j ^ , , 



' ' l^sans dents Ammocoete. 



This is the first notice of Eptatrhne. No genotype was mentioned. 

 ' Dictionnaire des Sciences Naturelles, XII, pp. 301-304. 



Proceedings U. S. National Museum, Vol. XXIII— No. 1234- 



735 



