146 
the diagnoses of all these pre-Linnzean genera are reprinted, although 
without formal adoption, into the binomial system. These genera 
are mononomially defined, at a later date than 1758, and there is no 
doubt as to the species intended to be included in them. If these 
names had been original with Walbaum, they would be accepted 
without question. What is their status as reprints in a compilation ? ” 
TYPHLONARKE, gen. nov. 
Dise subcircular, its outline broken only by a notch under the 
tail. Eyes not discernible. Spiracles with entire edges. Tail short, 
with a slight lateral fold. Dorsal fin single. Anterior portion of 
ventrals modified for walking ; posterior portion coalesced with the 
pectorals to form the hinder margin of the disc. Teeth confined to 
anterior portion of jaws, pavement-like, the hinder series with sharp 
cusps. Body naked. 
This genus differs from Narke in the form of the disc, in the 
coalescence of the disc with the ventrals, in the absence of functional 
eyes, and in the shortness of the tail. 
Benthobatis moresbyi Alcock,* a blind electric ray, was taken off 
the coast of Travancore (Southern India), at a depth of 430 fathoms. 
It is interesting to note that Typhlonarke aysoni, also blind, inhabits 
comparatively shallow water. 
Typhlonarke aysoni Hamilton. 
Buinp NuMBFISH. 
Plate XVIII. 
Astrape aysont Hamilton, Trans. N.Z. Inst., xxxiv, 1902, p. 224, 
pls. x—xu. 
Stations 2-5, 7, 8, 17, 18. 
Disc almost circular, the continuity of its margim being broken 
only by a slight notch under the tail. The position of the eyes is 
indicated by a minute white spot a little distance in front of each 
spiracle ; beneath the skin an optic nerve may be traced, but I fail 
to find any other sign of an eye. The spiracles are well developed, 
the space between them being one-third their distance from the front 
of the disc. Mouth narrow, protractile, in a fold of skin; lips ex- 
tremely fleshy, the upper one divided in the mid-line by an apparent 
space ; the lower lip is very deep, but the sides of the median fissure 
are close together, and each forms a ridge where they approximate. 
The nostrils are close together, and are covered by & common sub- 
quadrangular valve. Gull-slits in subparallel series. The teeth form 
a small pavement-like plate confined to the front of each jaw; the 
posterior angle of each tooth is produced, slightly on the anterior 
series, and increasingly so backwards until in the hinder teeth a sharp 
