456 GASTEROPODA OF THE INFERIOR OOLITE. 
which the middle one is the most prominent; there are also slight traces of 
smaller coste upon the flattened sides of the shell; the height exceeds the length 
of the aperture ; rare.” 
This diagnosis agrees with the specimen in the Jermyn Street Museum, 
although, according to my measurements, the height does not quite equal the 
length of the base. 
Relations and Distribution.—The relative height and compression may serve to 
distinguish this from any other species of Rimula, though it is evidently related 
to the species erroneously identified by Morris and Lycett (‘ Great Oolite Moll.,’ pt. i, 
p- 87, pl. vin, fig. 3), with Rimula (Emarginula) Blotii, Deslongchamps. The form 
figured by Morris and Lycett has been referred with a query to 2. Deslongchampsi, 
Cossmann (‘ Et. Bath.,’ p. 342, pl. xii, figs. 33—34). Rimula alta, as a species, is 
based on a single good specimen from Leckhampton. 
400. Rimu.a oonitica, sp. nov. Not figured. 
This name I propose for the forms in the Inferior Oolite which several British 
authors have referred, under the generic title of Rimula, to Emarginula Blotit, 
Deslongchamps." 
Description.—Shell small, strongly tricarinate, sides much compressed and 
flattened, and ornamented by seven or eight curved coste of considerable 
prominence. ‘The two intercarinal grooves are narrow, and show no trace of an 
intermediate rib. Transverse scalate ornament pervades the shell. Other 
indications clearly those of a imula and not of an Hmarginula. 
Relations and Distribution.—Differs from R. tricarinata, Sow., in its narrow, 
compressed, and elongated form: not so elevated as FI. alta, which also possesses 
somewhat different lateral ornamentation ; resembles the Great Oolite species 
! Thus we find the following identifications : 
1851. Rirvuna Buoriw, Deslongchamps. Morris and Lycett, Gt. Ool. Moll., pt. i, 
p- 87, where it is stated to occur in 
the shelly roestone at Leckhampton. 
1854. — —_ — Morris, Cat., p. 275, both in G. O. and 
TO: 
1875. —  Bnuorrrt (sic), Deslongchamps. Judd, Geology of Rutland, p. 282, 
as a fossil of the Inf. Ool. in the 
Midlands (Etheridge). 
1892. .— Buon, Deslongchamps. Hudleston and Wilson, Cat., p. 116, 
both in G. O. and I. O. This view 
was based on the identifications of 
the authors previously quoted. 
