MAZATLAN UNIVALVES 249 



Sab. Mazatlan ; 1 sp. off Spondylus ; Lpool Col. 

 Tablet 1165 contains the specimen. 



315. ?? LIOTIA C-B-ADAMsn, n. s. 



?? L. t. tenuissimdj diaphand, albd ; turritd, anfractibus iii. 

 tumentibus, sup erne sub angulatis ; liris radiantibus (inanfr.ult. 

 xxiij a lirulis spiralibus circiter viii. nodulosis clegantissime 

 cancellatis ; anfr. primo et dimidio Icevibus, tumentibus ; liris 

 radiantibus in basi evanescentibus ; umbilico parvo ; aperturd 

 subcirculari, peritremati continue, ab anfr. penult, vix inter - 

 rupto. 



Although this is clearly a young shell, its characters are so 

 well marked and distinct from any other known Mazatlan 

 species, that it has been thought best to preserve a remem- 

 brance of its beauty in connexion with the name of the most 

 accurate and deeply lamented Prof. C. B. Adams. It has the 

 texture of Vitrinella, but is distinguished by its turrited form, 

 and by the large size and short length of its apical portion, 

 which occupies a whirl and a half, instead of three minute 

 whirls as is customary in that genus. The rest of the shell is 

 beautifully decussated by radiating lirse, obsolete on the base, 

 knotted by revolving lirulse, three of which appear on the base. 

 Both labrum and labium are extremely thin. It may possibly 

 belong to Rissoidae. Long. '024, lat. '022, div. 70. 



Hob. Mazatlan ; 1 young sp. off Spondylus ; L'pool Col. 

 Tablet 1166 contains the specimen. 



316. ? LIOTIA , sp. ind. 



Tablet 1167 contains a fragment of a somewhat elevated 

 shell, with the apex flattened. The first whirl is large and 

 smooth as in PPL. C-B-Adamsii ; but the sculpture is extremely 

 strong, with stout transverse tubercular ridges and spiral 

 decussating lirse. It is distinguished from Chrysallida by the 

 flat, dextral apex. 



JIab. Mazatlan ; 1 sp. off Spondjdus : L'pool Col. 



