INSTITUTE OF SCIENCE, PHILADELPHIA. 261 



shouldered aspect to the whorls, but this is an exceptional mutation. Speci- 

 mens of the variety have been found in the Waccamaw and Caloosahatchie 

 beds. 



Turbonilla obeliscus C. B. Adams. 

 Chemnilzia obeliscus Adams, Contr. Conch., p. 72, 1S50. 

 ^ Pliocene of the Croatan and Caloosahatchie beds. Living from North 



Carolina to St. Thomas and Jamaica, West Indies, from low-water mark to 63 

 fathoms. 



This species has exactly the characters of T. interrupta, except that it is 

 proportionately more slender and usually a smaller shell. Prof. Adams's 

 types at Amherst are fragmentary, but recognizable, and specimens named by 

 him are in the National Collection. 



Turbonilla multicostata C. B. Adams. 

 ■Cheinnitzia mtiJticoslata Adams, Contr. Conch., p. 72, 1850. 



Pliocene of the Croatan and Waccamaw beds. Living on the Carolina 

 •coast and in the Antilles. 



The Southern specimens of this species are rather smaller than the fossils, 

 but otherwise agree very well with them. T. textilis Kurtz is its nearest rel- 

 ative. 



The pillar is simple ; the extremely numerous and close-set, flattish ribs 

 terminate not very abruptly at the periphery ; the close-set, straplike spirals 

 overrun and uniformly cancellate the ribs ; the nucleus and three or more early 

 whorls are smooth and polished. There is a tendency for the spiral band 

 next the suture to marginate it, but this is more evident in some specimens 

 than in others. 



Turbonilla punicea Dall. 

 T. [viridaria var. ?) punicea Dall, Proc. U. S. Nat. Mus. vi. p. 332, 1883. 



Newer Miocene of the Cape Fear River at Mrs. Purdy's marl-bed, John- 

 son ; Pliocene of the Caloosahatchie beds, Florida, Dall ; living on the coast 

 of North Carolina, East and West Florida and the Bahamas from low-water 

 mark to 30 fathoms. 



This species has a little the form of a Liostraca and in life is dark-colored. 

 As is usually the case, extreme Southern specimens are smaller than the more 

 northern ones. The ribs do not cease abruptly on the base, the spiral sculpt- 

 ure is always rather feeble and sometimes obsolete, the pillar in mature speci- 

 mens presents a well-marked plait, which in younger specimens lags behind 

 the aperture and is invisible. 



Turbonilla protracta n. s. 

 Plate 13, figure 11 a. 

 Newer Miocene of the Cape Fear River, North Carolina, from Mrs. 



