ETHEOSTOMATID&. q 
Boleosoma they are separated by the non-protractile upper jaw, and 
they seem to have little relation with the species referred to Nothonotus. 
Nanostoma, then, appears to be a distinct genus, or at least a 
strongly marked section, and I propose to accept the name and to se- 
lect, as the type of the group, P. zonalis Cope (= WN. pictum Putnam, 
MSS.). Nanostoma bears so. .ewhat the same relation to Nothonotus that 
Boleichthys does to Pecilichthys. 
Generic characters.—Body fusiform, little compressed, entirely scaly, 
without enlarged ventral plates. Mouth small, subinferior, the upper 
jaw not protractile ; vomerine teeth ; scales large ; lateral line complete ; 
cheeks and opercles scaly; dorsals well separated, the second much 
larger than anal, higher but rather shorter than spinous dorsal. The 
separation of the dorsals, the form of the body, the small size of the 
mouth, and the large size of the scales separate Nanostoma from No- 
thonotus. The scaliness of the cheeks, neck, and throat are differences 
of Some importance. 
4, HADROPTERUS TESSELLATUS, sp. nov. 
? Boleosoma tessellatum, THOMPSON, Appendix Hist. Vt. p. 31, 1853 (not of De Kay, 
9 
? Pe sari PuTNaAM, Bull. Mus. Comp. Zool. i, 1863, 5. 
? Boleosoma tessellatum, THOMPSON, nec De Kay, Jordan & Copeland, Bull. Buff. Soe. 
Nat. Hist. 1876, 135, 163.—Jorban, Man. Vert. 1876, 222. 
A specimen of an Etheostomoid in the United States National Mu- 
seum, labelled Cottogaster, has the characters assigned by Prof. 
Putnam to his genus of that name, and is presumably the species which 
he catalogues, without description, as C. tessellatus. Prof. Putnam ac- 
cepted the specific name from Thompson, who seems to have supposed, 
erroneously, that he was describing De Kay’s Boleosoma tessellatum. 
Prof. Putnam states that his Cottogaster tessellatus is a species of 
Boleosoma, but the species now under consideration is certainly a Ha- 
dropterus, as L understand the latter genus. I therefore propose for my 
species the name of Hadropterus tessellatus Jordan. If Prof. Putnam’s 
species proves different, it should be renamed, as there has been al- 
ready a tessellatum in Boleosoma, and mine will keep its name. If the 
two are, as I suspect, identical, then we will write Hadropterus tessella- 
tus (Putnam) Jordan, and no confusion in nomenclature need arise. 
H. tessellatus has the form of Imostoma shumardii, fusiform, with a 
broad, heavy head; mouth wide, the upper jaw rather longest, not pro- 
tractile; cheeks and opercles naked (?in life); chest naked; neck 
