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A New Varietel Form of Turbo Petholatus, Linn 



BY MAXWELL SMITH. 



In the American Museum of Natural History of New York is a 



series of Turbo petholatus which seems worthy of note. Specimens 

 are represented in the Haines, Jay, Crooke and Stuart collections. 



Out of fifty-two specimens eleven are heavily shouldered (fig. 2), 

 seven show a tendency toward shouldering and the remainder are 

 typical (fig. i). This extreme form justifies a varietal name and to 

 recognize its character I would suggest var. liuuierosus. 



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