266 TRANSACTIONS OF THE WAGNER FREE 



which the base of each whorl overhangs the suture is a special character. It 

 seems to be a very rare species. 



Triforis terebrata Heilprin. 



A species too fragmentary for proper determination, and yet different 

 from any of the preceding, was obtained by Burns in the Chipola marl. It is, 

 perhaps, identical with T. terebrata Heilprin, from the Shiloh, N. Jersey, marls 

 (cf Proc. Acad. Nat. Sci. 1887, p. 405), with a careful drawing of which it has 

 been compared. It bears a somewhat distant resemblance to a large, fine 

 species inadequately described and inaccurately figured by Meyer under the 

 name of T. major. Better specimens of major from Wahtubbee, Miss., show 

 that its characteristics are a line of large, rounded nodules near the posterior 

 suture, close to which is a sharp, somewhat undulated, elevated line, while at 

 a little greater distance from the last is a smaller row of spira'Uy compressed 

 nodules over which runs a sharp-edged, elevated line ; in front of the last and 

 forming the edge of the anterior suture is a fine spiral line. The adult base is 

 unknown ; the young have it flattened with radiating, arcuate striae and the 

 margin deeply grooved or rabbeted so that the central region stands out from 

 the whole base in a disk-like manner. This species must reach a length of 

 20 and a diameter of 4.5 mm. It has been referred to similis Meyer by De 

 Gregorio, but is really a very distinct species, though this could not be learned 

 from Meyer's work. T. similis Meyer of the Claibornian, described from a ' 

 wretchedly worn fragment, appears to the writer to represent some broken 

 middle whorls of a species of which the apex has been described by Meyer as 

 T. bilineatiLS from the Red Bluff Eocene. The former name would best be re- 

 tained, since the species is certainly not bilineate in the adult. 



The T. meridionalis Meyer, based on another badly worn fragment, ap- 

 pears to be a distinct species ; a fragment which even Meyer found too bad to 

 name, but which seems to be a part of a young meridionalis, has been named 

 from Meyer's figure T. similis var. Meyeri, De Gregorio. It is probably not 

 connected with T. similis. 



Triforis distructus Gregorio is a lapsus for distinctus Meyer. 



In the Miocene, beside those before referred to, T. bicostattis Conrad (as 

 of Emmons) is not a Triforis, but a Cerithiopsis, probably identical with C. 

 Emersonii Adams, while Cerithiiim {Sychar) moniliferum Conrad is Triforis 

 melanura Adams. 



From the Pliocene of Costa Rica Gabb has identified the T. t^irris-thomm 

 of Orbigny. 



