436 MAZATLAN UNIVALVES 



decussating transverse threads, extremely faint ; but displays 

 very sligkt riblets near the suture, nearly obsolete over the 

 body of the Avhirl. 



Sai.— Mazatlan ; 2 sp. o ff Spondlus ; L^'pool Col. 



Tablet 2010 contains the younger specimen. 



Genus EULIMELLA, Forhes. 



Forbes Sf Kant. Br. Moll. vol. iii. p. 308.— S". 8f A. Ad. Gen. 



vol. i. p. 233. 

 Chemnitzia, pars, Clark, Moll. Mar. Ins. Brit. p. 5^, &c. 



540. .PEuiilMELLA OBSOLETA, n. S. 



Eu. t. valde elongata, alho-fusca ; lirulis minimis traiisversis 

 infra suturam monstrantibus, basin versus ohsoletis ; striulis 

 minimis transversis ornafa. 



This species is named, though from an imperfect specimen, 

 as being an interestiag link between Eulimella and Chemnitzia. 

 The apes is unfortunately hidden by a very beautiful incrusta- 

 tion which covers part of the spire. It has four whirls, and 

 measiires '06 by '027. 



Hah. — Mazatlan ; 1 sp. off Spondylus ; JJ'pool Col. 

 Tablet 2011 contains the specimen. 



541. Eulimella , sjy. ind. (a.) 



Tablet 2012 contains an imperfect specimen of a beautifully 

 glossy and pointed species, with a prominent sinistral apex, 

 and subplanatc whirls ; of these the first six measure "057 by 

 •028. 



Sab. — Mazatlan ; 1 sp. off Spondylus ; Z'pool Col. 



542. Eulimella , sp. ind. (b.) 



Tablet 2013 contains a specimen of normal shape, but with 

 the surface too abraded for description. It has 6 whirls, and 

 measures '082 by '038. 

 ^TaS.— Mazatlan ; 1 sp. off Spondylus ; L'pool Col. 



