PUNCTURELLA. 457 



figured by Morris and Lycett (Great Oolite Moll., pt. i, p. 87, pi. viii, fig. 3), but is 

 more compressed, more sharply angular, and quite devoid of the intermediate ribs 

 in the intercarinal grooves. 



There are three specimens from the Leckhampton freestones in the Brodie 

 Collection. 



Genus — Punctueella, Lov.-e, 1827. 



Shell conical^ elevated, apex slightly recurved ; perforation in front of the apex, 

 small; interior exhibiting a raised border behind the aperture, and on a level with the 

 apex; external surface cancellated. 



Mons. Cossmann was probably one of the first to point out that the Jurassic 

 forms hitherto referred to Fissurella might with more justice be assigned to 

 Puncturella. I have already stated that no true Keyhole Limpet has been seen 

 by me from the Jurassic Rocks. 



401. PoNCTUEELLA ACUTA, I)esZo?2^c/iaw^s, 1842. A micromorj)h, PL XLI, figs 19 o, 



19 6, 19 c. 



18 J2. FissuEELLA ACUTA, DesIonffcJiamps. Mem. Soc. Linn. ^N'orm., vol. vii, 



p. 122, pi. vii, figs. 22—24. 



ISol. — — — Morris and Lycett, Great Ool. Moll., 



pt. i, p. 85, pi. viii, fig. 5. 



1885. PuNCTTJRELLA ACUTA, BeslongcJiamps. CossinanD, Etage Batlionien, p. 344, 



pi. vi, figs. 25 —27. 



Description. — The length of the figured specimen is about 2 ram., width and 

 height a little less. The base is nearly circular, the apex subcentral. Radial 

 costse are numerous and close, and decussated by finer transverse lines, the points of 

 intersection being marked by small rounded granulations. The perforation aj^pears 

 to be a little in front of the apex, and very narrow. The internal border or septum 

 is distinctly visible in the figured specimen. 



Relations and Distribution. — These micromorphs from the Peagrit of Leck- 

 hampton possess such a general resemblance to Deslongchamps' species that this 

 identification seems legitimate. There are four specimens in my collection, all 

 about the same size. 



