388 R. Lydekker—An Ichthyosaurus paddle. 
spring of 1888, in the red beds of the “New Cut” or “ Lincombe- 
Hill Drive,” from which the late Mr. Champernowne obtained his 
Homalonotus some years ago.' These beds lie high upon the slope 
of the Ilsham Valley, some hundred yards to the North of Meadfoot 
Bay. They are considered by Prof. Hughes to be the same as, or, 
more probably, slightly lower than the Pleurodictyum-beds of Kil- 
morie; and he has obtained Pleurodictyum and other fossils from 
beds in their immediate neighbourhood. 
EXPLANATION OF PLATE XI. 
Fie. 1. Eehinocaris Whidbornei, sp. nov. 
Fig. 2. Lchinocaris punctata, Hall; after Beecher, about 2rds.; shown for 
comparison, and to indicate the form of the whole animal. 
Fies. 38-5. Beyrichia Devonica. 
]].—On an IcurHyosaurian PappLE SHOowING THE CONTOUR OF 
THE INTEGUMENTS. 
By R. Lyprxxer, B.A., F.G.S., F.Z.S., ete. 
N the year 1841 Sir R. Owen described and figured? a slab ot 
rock from the Lower Lias of Barrow-on-Soar which showed 
the impressions of the bones and integuments of a pelvic paddle of 
an Ichthyosaurus, probably referable to the typical I. communis. In 
this specimen ® it appears that the integuments were produced to a 
greater extent on the posterior than on the anterior side of the bony 
framework; and that. while the anterior margin of the soft parts 
showed evidence of squamation, the larger posterior flap was marked 
by oblique striz extending from the bones to the periphery which 
appeared to have been caused by parallel bundles of muscular fibres. 
The distal extremity of the soft fin terminated in a sharp point far 
below the distal bones. ’ 
This specimen appears to be the only English example hitherto 
described showing the form of the integuments of the paddles. In 
1888, however, Dr. E. Fraas published a paper on the integuments 
of the paddles of Ichthyosaurus,* in which he described two specimens 
belonging to the Longipinnate®’ group of the genus, which may 
apparently be referred either to I. acutirostris or the allied I. 
Zetlandicus. One of these specimens showed both the pectoral and 
pelvic paddles, while the second only exhibited the pectoral paddle, 
which is figured in the plate accompanying the memoir. These 
Specimens confirmed the inferences drawn from the English example, 
but showed that in the Longipinnate group the integumentary portion 
of the paddles was relatively wider, and terminated in a blunt lower 
extremity, which extended but a short distance beyond the distal 
1 Grou. Mac. 1888, pp. 487-491, Pl. XIIT.; 1882, pp. 157-8, Pl. IV. Fig. 3. 
? Trans. Geol. Soc. ser. 2, vol. vi. pt. i. p. 199, pl. xx. See also Liassic Reptilia 
(Mon. Pal. Soc.) pt. i. pl. xxviii. fig. 3. 
3 British Museum, No. 29672. 
+ Jahresh. Ver. Nat. Wiirttemberg, 1888, pp. 280-303, pl. vii. 
° See the writer’s Catalogue of Fossil Reptilia and Amphibia in British Museum, 
pt. i. p. 69 (1889). 
