DiAGXOSES OF New Forms ov ^foTxtrscA from the Van- 

 couver District. By Philip P. Carpenter, 15. A., Ph.D. 



Tebebbatula unguicula, n. s. 



T. t. juniore " Terebratiilinae capiti-serpentis" simillima, sed la- 

 tiore, subtisangalata ; j)unctis vulde conspicvis ; costis con- 

 spicuis, interdum obtusioribus, aliis inteicalaiitibits ; intus, 

 amento suboctiformi, jwstice aperfo, cruris duii/ona'ibus cardini 

 affl.vis : testa adidta valra inferiore subrotundata, maryinem 

 versus haud phtnata \ umbone valde tumente, latiore ; striis 

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

 cminlatis, haud undatis ; intus amento majorc, bisinuato, dor- 

 saliter haud confinuo, cdcaribus duobus munitu. 

 Long. "6, lat. •.'), alt. "3 })' 11. 



Hub. Sail Diego, (j fm. ; Monterey, not rare in 20 fm., (in Cali- 

 fornia State Geological Survey) Cooper. Neeali Bay (valve), Sicun. 

 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 remamed 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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