RIMULA. 453 
Relations and Distribution—This is an elegant little shell belonging to the 
more highly ornamental species of Hmarginula, represented in the Great Oolite by 
H. Deslongchampsi, Cossmann. The number of ribs and general ornamentation 
answer to H. Leckhamptonensis, Lycett. But this is an elevated species, whereas 
i. Leckhamptonensis isa depressed one. ‘The “ base-bed ” at Lincoln has furnished 
the type, besides two smaller forms of similar shape but with fewer ribs. 
The specimen (Figs. 13 a, 13 b) from the Lincolnshire Limestone of Stoke Lodge, 
with much the same dimensions and ornamentation, has a less oval periphery and 
only twenty ribs. In some respects this form seems intermediate between 
H. scalaris and H. Lindonensis. 
395. EMARGINULA GRANULATA, Lycett, 1850. Not figured. 
1850. EmarernuLa Granuiata, Lycett. Ann. Mag. Nat. Hist., 2nd ser., vol. 
vi, p. 415. 
1853. — = = Proe. Cotteswold Nat. Club, vol. i, p. 76. 
1854. — — — Morris, Cat., p. 246. 
Bibliography, §c.—There must have been something unusually satisfactory in 
this species to induce Morris, who ignored the majority of Lycett’s Inferior Oolite 
list, to give it a place in his catalogue. Hudleston and Wilson did not recognise 
it. Lately, however, the Brodie-Lycett collection has been acquired for the 
Jermyn Street Museum, and what purports to be a named specimen from the 
shelly freestones of Leckhampton is available for inspection. 
Description —‘‘ Ovately globose; apex curved posteriorly ; coste numerous, 
very fine, with others still more delicate alternating, and rendered granular by 
transverse encircling lines.” ! 
Genus—Rimuta, Defrance, 1819 (? 1827). 
Shell having a general resemblance to Emarginula, but more capuliform, with a 
perforation on the midrib near the anterior margin, which is itself entire. 
Fischer, who regards this as a sub-genus, expresses a doubt whether the shells 
of the Mesozoic rocks, referred to Iimula, have precisely the same interior 
structure as those of more recent date. 
1 Lycett, ‘Ann. Mag. Nat. Hist.,’ 2nd ser., vol. vi, p. 410, also quotes Z. planicostula, 
Deslong., from the I. O. of Leckhampton, and this is accepted by Morris. 
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