BULLETIN FLORIDA STATE MUSEUM


ticularly in areas where the two species occur sympatrically, I feel
the selection of a neotype is desirable. I therefore designate as neo-
type of Luxilus chrysocephalus Rafinesque (1820) an adult male
(UMMZ 174539) 99 mm SL, collected in a creek about 6 miles SSW
of Danville, off highway 35, Lincoln County, Kentucky 5 April 1953
by R. M. Bailey and party. Six other topotypes (UMMZ 165232)
were collected with the neotype.
 The more important meristic counts for the neotype are: Anterior
dorso-lateral scales 14, circumferential scales 28, lateral-line scales
38, caudal-peduncle scales 16, pectoral rays 17-17, anal rays 9.
 NOMENCLATURE. The "large-scaled form" of N. cornutus has long
been recognized by ichthyologists. Many chose to regard it merely
as a variant of cornutus, although some separated it subspecifically.
Consequently the identification of N. chrysocephalus in the literature
often must be resolved by geography. Cope (1864: 279) believed
Agassiz's description of Hypsilepis frontalis was based on this spe-
cies, and as a result the name frontalis was incorrectly applied for
more than 50 years. Not until 1926 did Hubbs point out that frontalis
represents the fine-scaled northern form, and that the name chryso-
cephalus, which Jordan (1876a: 94) had placed in the synonymy of
Cyprinus cornutus Mitchill, applied to the coarse-scaled southern
form.
 Cope's (1867: 158) description of Hypsilepis cornutus gibbus pos-
sibly was based on the hybrid Notropis cornutus X Notropis chryso-
cephalus. Although Cope recorded only 16 predorsal scales for this
form, individuals of the cross sometimes have almost as large scales
as does chrysocephalus. Unfortunately the types of gibbus appar-
ently no longer exist so this question is impossible to resolve.
 An examination of the seven syntypes of Alburnops plumbeolus
 Cope (ANSP 2055-2061) shows that six specimens are N. chrysoceph-
 alus, the other Notropis heterodon. To fix the status of the specific
 name plumbeolus and to prevent possible confusion with Notropis
 heterodon I designate as lectotype of Alburnops plumbeolus a speci-
 men 40.5 mm SL, catalogued as ANSP 2055. Five specimens become
 paratypes (ANSP 2056-2060), while the last is recatalogued as Notropis
 heterodon (ANSP 2061).
 Cope (1869a: 230-232) described Hybopsis lacertosus on the basis
 of five specimens from Bear Creek, a tributary of the Middle Fork of
 the Holston River, Virginia. Nothing in the original description indi-
 cates how this form differs from Notropis c. chrysocephalus or No-
 tropis coccogenis, the species of Luxilus occurring in this area, al-
 though the name "lacertosus" signifies a slender body. Unfortunately,


Vol. 8