T. G. Brown — Fauna from Chappaquiddiclc Island. 235 



This species resembles very closely a Turritella not specifi- 

 cally identified from the Eocene of Whellock, Texas, in the 

 University collection. The Whellock specimen is larger but 

 has the same apical angle, is free from ornamentation and has 

 the anterior and posterior carinate ridges present but faintly 

 marked. 



This description is based on a wax imprint made from a very 

 perfectly preserved external mold in a red micaceous sandstone 

 concretion. The full length of the shell is not represented, so 

 that the number of whorls and dimensions cannot be given. 

 There are no characters of aperture and lips apparent. 



Terebra sp. ?. PI. VIII, fig. 5. 



Shell elongate, spire elevated, whorls closely placed, rapidly 

 enlarging, flat on the outer surface between suture, free from 

 ornamentation or with very faint revolving lines, aperture 

 elongate elliptical, pointed anteriorly, rounded posteriorly ; 

 outer lip thin and broadly arcuate, inner lip smooth without 

 callus or ridge. 



The specimen figured occurs on the edge of a small fragment 

 of rock. The apex is concealed in the matrix and the anterior 

 end of the aperture is slightly injured so that it does not show 

 the minute characters. 



Terebra juvenicostata sp. n. PI. VIII, fig. 6. 



Shell small and slender, spire elevated ; apex pointed, acute 

 with an apical angle starting at about thirty degrees and 

 decreasing toward the body whorl where the sides of the spire 

 approach to parallelism ; the whorls are closely placed and 

 flattened between the sutures. There are distinct ribbings on 

 the earlier whorls which become less distinct along the advanc- 

 ing spire and disappear on the body whorl. 



Odostomia semicostata sp. n. PI. VIII, fig. 7. 



Shell small, consisting of six or seven volutions, spire ele- 

 vated, apical angle thirty degrees ; sutures very pronounced ; 

 volutions flattened convex between sutures ; earliest whorls 

 marked by distinct transverse plications or ribs which become 

 almost or quite obsolete on body whorl ; outer lip distinctly 

 denticulate within. 



The aperture and columella of this specimen is not fully 

 preserved so it cannot be accurately described. Length of 

 shell as preserved 9*5 mm . 



Odostomia erenulata sp. n. PI. VIII, fig. 8. 



Shell very small, spire high and closely coiled, apex sub- 

 acute, whorls flattened externally, faintly crenulate along the 

 posterior margin, suture distinct, aperture and lips unknown. 



