630 Mr. R. Gurney on Scapholeberis auvita. C. & V., without good reason, since G. flavus is described as having " la bouche f endue j usque sous l'arriere de l'oeil," whereas in 6f. latus the cleft of the mouth barely extends to below the middle of the eye. Moreover, it appears to me to be unjustifiable to place G. banana, C. & V., in the synonymy of G. taiasica, Lichtenstein. The description of this latter species is entirely inadequate, but as it is said to come from Brazil it is more probably identical with G. latus than with G. banana, which has been recorded from the Antilles and from Central America. Chasmodes maculipinna. Depth of body 4 times in the total length, length of head 3£ times. Snout concave, equal in length to the eye, the diameter of which is 4j times in the length of head. Inter-orbital space narrow, concave. Maxillary extending to below posterior -^ of eye. D. XII 14, a notch between spinous and soft-rayed portions, the latter the higher, its longest rays equal to the postorbital part of head. A. 18. Pectoral equal to | the length of head. Anterior part of dorsal with a large black spot, extending from the first to the fourth spine. Total length 63 mm. A single specimen from the Rio Durango, N.W. Ecuador. LXV. — Notes on Scapholeberis aurita (S. Fischer), a Glado-ceran new to Britain. By Robert Gukney, B.A., Sutton Broad Laboratory. The only species of the genus Scapholeberis hitherto recorded as British is S. mucronata (0. F. Miiller), but I have now to add S. aurita, which I have recently found in three localities in Norfolk. Considering the peculiar swimming habits of S. mucronata, as described by Mr. Scourfield *, it may be of interest to compare the two species in this respect, and also with regard to certain points in their structure. In both species the ventral margin of the shell-valves is flattened, but this area is proportionally larger in S. aurita and is bounded externally by a very prominent ridge and internally by the thickened edge of the valve. This thickening of the edge, which is quite conspicuous, is not continued the * Journ. Linn. Soc, Zool. vol. xxv. pp. 1-19 (1894).
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