Diagnoses of Nkw Forms ot- Moi.lxjsca from the Van- 

 couver District. By Philip P. Carpenter, B.A., Ph.D. 



Tebebbatula unguicula, n. s. 



T. t. juuiore " Terebratulinse capiti-serpentis" similUma, sed la- 

 tiore, Subti^angulata ; punctis valde conspicuis ; costis con- 

 spicuis, inter dum ohtusioribus, aliis interculaat'ibus ; intus, 

 amenfo suboctiformi, postice aperfo, cruris diagonalibus cardini 

 ajjixis : testa adulta valva inferiore subrotundata, marginem 

 versus haud planata \ umbone valde tumente, I at lore ; striis 

 radiantihus, ut in " T. capite-serpentis " conspicuis ; marginibus 

 crenulatis, haud undatis ; intus amenta majore, bisinuato, dor- 

 saliter haud continuo, calcaribus duobus munito. 

 Long. '6, lat. '.5, alt. "3 poll. 



Hub. San Diego, 6 fm. ; iNIonterey, not rare in 20 fm., (in Cali- 

 fornia State Geological Survey) Cooper. Neeah Bay (valve), Swan. 

 Vancouver, Forbes. 



The specimens sent by Dr. Cooper were all of small size, and, from 

 the intercalation of riblets near the margin, clearly immature. They 

 presented the incomplete loop of the restricted genus to which Dr. 

 Cooper affiliated them. Notwithstanding, as both Davidson and Wood- 

 ward state that the young of the British species has the loop similarly 

 open, it remained doubtful whether this might not prove conspecific. 

 Messrs. Reeve and Hanley unhesitatingly pronounced them to be 

 " caput-serpentis, jun.," the latter gentleman stating that they pre- 

 sented the peculiar form of that species which belongs to the Medi- 

 terranean examples. Dr. Forbes, however, was fortunate enough to 



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