212 Annals of the Carnegie Museum. 



penultimate whorl showing a rapid elongation, body whorl 6 mm. 

 long or considerably longer than the spire. 



"Aperture elongate, oblique, narrow, with well formed anterior 

 canal ; inner wall of aperture nearly straight ; outer lip convex, 

 gradually increasing its distance from the axis for about one-fourth its 

 length, remaining nearly parallel for another fourth and then slightly 

 increasing its convexity to anterior extremity. With the aperture 

 toward the observer, the shell appears slightly angulated at a little 

 above the middle on the right. Turned toward the left through 90 , 

 the right hand outline is more uniformly convex. Suture but slightly 

 impressed. Surface smooth." 



Locality. — A rare species in the Chazy, found so far only on 

 Valcour Island and at Chazy, New York. 



Family Littorinid^e Gray. 



Genus Holopea Hall. 



Holopea scrutator Raymond. 



(Plate LIV, figures 7, 8. ) 

 Holopea scrutator Raymond, 1905, American Journal of Science, 

 Series 4, Vol. XX, p. 379. 



Description. 



Shell of medium size, about three whorls, the body whorl consti- 

 tuting by far the larger part of the shell. Spire depressed, sutures not 

 deep. Aperture elongate, oval, entire. Umbilicus small. 



The specimens usually occur as casts, but on a few the shell is pre- 

 served. It shows no markings except a few growth lines which run 

 diagonally back across the whorl. 



When the specimens are exfoliated, the suture lines are much more 

 deeply impressed and the spire appears higher. 



This shell is easily recognized by the low spire, the shallowness of 

 the sutures and the general depressed form of the shell. 



Locality. — Common in the Chazy at Valcour Island and Chazy, 

 New York. The types are in the Yale Museum. 



Holopea harpa (Hudson). 

 (Plate LIII, figure 13 ; plate LV, figures 16, 17.) 

 Straparollina harpa Hudson, 1905, Report New York State Paleon- 

 tologist for 1903, p. 292, PI. 5, figs. 4, 5. 





