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42 THE ROYAL SOCIETY OF CANADA 
in all the scales irrespective of their size. In many of the scales, 
more particularly in those well forward, growth lines are noticed near 
and parallel with the lower margin. 
For the species above described the name cupidineus is here 
proposed. As regards the present reference of this species to the 
genus Elonichthys it may be stated that the remote position of the 
dorsal fin, directly opposite the anal fin, is not fully in accord with 
its generally understood location in that genus. Other characters, 
such as the small size of the pelvic fin, the broadness of the pectoral 
distally, and the absence of sculpture on the principle fin-rays are also 
in disagreement with Elonichthys. Until, however, the head, tail and 
dorsal fin of this Banff fish are known, or at least some diagnostic 
characters supplementing those of the fins and scales, a provisional 
generic reference only is possible. Some knowledge of the dentition 
is particularly desirable. 
Measurements of Type Specimen of 
Elonichthys cupidineus 
. mm. 
Length of pectoral fin, slightly over 5 inches, about........... 130 
Greatest breadth at midlength of same, estimated............ 60 
Length of pelvic fin near anterior border, estimated.......... 28 
Length of anal fin near anterior border, estimated............ 48 
Length of dorsal fin near anterior border, estimated.......... 42 
Fensthofibase:ofipectoral in about se fy a ee ee 15 
Length of base.of anal tiny about NE PERRET 35 
benethombaseohdorsal fin about. se ee Re 35 
Breadth of pectoral fin rays (3rd, 4th, 5th, 6th and 7th) above 
their first subdivision: each ation en ee CP M RER DER 15 
In 5th pectoral ray, about midlength of fin, six joints in...... 11 
Fuleraof; pectoral. in, about seven 10 ri boars oe 13 
Fulcra olpelvic'än about seven Ineo. tote eee jee ae eee Th 
Upper anterior flank’scales) height" ne cr DEN ARRET 9 
Upper anterior flank scales, length (fore and aft)............. 3:73 
Lower anterior flank scales.theisht Mise UN er aee 4-2 
Anterior abdominal: scales; ete his eee RE RU Re 1-4 
Lower flank scales, in line with pelvic fin, height............. 2-5 
Lower flank scales, in line with anal fin, height.................2:3 
Length of fin-supports near front of dorsal fin, about......... 10 
Acrolepis letus, sp. nov. Plate III. 
A species of small size, with scales rugosely sculptured, is repre- 
sented by an imperfect trunk, Cat. Nos. 755, 755a. In this specimen, 
