RIMULA. 453 



Relations and Distribution. — This is an elegant little shell belonging to the 

 more highly ornamental species of Emarginula, represented in the Great Oolite by 

 JE. De^longcliampsi, Cossmann. The number of ribs and general ornamentation 

 answer to E. Lechhamptonensis, Lycett. But this is an elevated species, whereas 

 E. Leckhamptonensis is a 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 h) 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 

 E. scalaris and E. Lindonensis. 



395. Emarginula granulata, Lycett, 1850. Not figured. 



1850. EMAitC4i>'ULA GRANTTLATA, Lijcett. Ami. Mag. Nat. Hist, 2nd ser., vol. 



vi, p. 415. 



1853. — — — Proc. Cotteswold Nat. Club, vol. i, p. 76. 



1854. — — — Morris, Cat., p. 246. 



Bibliography , Sfc. — 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; costge numerous, 

 very fine, with others still more delicate alternating, and rendered granular by 

 transverse encircling lines." ' 



Genus— Rm\]hk, Defrance, 1819 (? 1827). 



Shell having a general resemblance to Emarginula, but more capuliform, with a 

 perforation on the midrib near the anterior margin, inhich is itself entire. 



Fischer, who regards this as a sub-genus, expresses a doubt whether the shells 

 of the Mesozoic rocks, referred to Bimula, have precisely the same interior 

 structure as those of more recent date. 



^ Lycett, 'Ann. Mag. Nat. Hist.,' 2nd ser., vol. vi, p. 410, also quotes E. planicostula, 

 DesloDg., from the I. O. of Leckhampton, and this is accepted by Morris. 



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