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TEI^I^A (AiraUIUo) iPOMSA n. sp* 



Desoripti o.. .- :ihell small, elongate, v; el] -inflated, dec- 

 idedly inequilateral; broadly rounded anteriorly, >5luntly pro- 

 duced "below posteriorly; antero-dorsal rrari-in lonp-, straip-ht, 

 postero-dor sal margin sll^rhtly excavate" along- the len.^th of the 

 liprament, the remainder convex, roimding abruptly below into the 

 slightly arcuate "base; ninhonGS low, placed at aboat the posterior 

 third; posterior cari.io jjorly define , area in front of it 



slip:htly dep- ■, caiising the basal niarrvin to be obscurely 



enjarginated ; external surface scul|)tiired with fine, regular, 

 consoieuoas concentric striae, becoming slightly lamelZar on the 



posterior deprer-sed area; hinge normal, th' right posterior 

 lateral very VTeak; pallial sinus obscure. 



Dimensions .- -^ength, 5 lam. ; alt., 4 i:P. . ; seniidiam., 1.2 mni, 

 Remarks .- T. a'oomsa is describe^- from tv/o right valves. 

 The most characteristic festii^e is the fine, rep-ular well-develop- 

 ed sculotijxe. Af:ide from the -x-uater prominence of the sculptiore, 



anomsa is distinguished from phsrcida by its greater inflation 

 and greater height and from °'onid a. by its le.^ ;sterior 



end, steeper antero-dorsal ~"^ :, :;, • -re -oronouiiuw joi.-erior 

 carina and accompanyin- degression of the shell anteriorly and 

 acGomioanyinrr deT)res:"ion of the shell anteriorly and insinuation 



