NIAGARA FALLS AND VICINITY 



239 



NAME OF SPECIES 



•a 



c 



!3 







X 



X 

 X 

 X 



X 

 X 

 X 

 X 



X 

 X 



X 



1.1 

 O- 

 





 u 



Oh 



X 

 X 



'u 



> a. 



c 







a 





u 



s 



."H 





u 

 



X 



v. 



'3 



u 



c 

 '> 



Pelecypoda 



18 Sphaeriumstriatinum (Lam.) 



19 S. stamineum (Conrad) 



20 Pisidium virginicum Bourg. . 



21 P. compressum Prime , 



22 P. abditum Haldeman 



X 



.... 



X 



X 



X 



X 



. . . . 









/^ 

















// 

















a 



23 P. ultra-montanum Prime... 



24 P. scutellatum Sterki 



25 Lampsilis rectus (Lam.) 



26 L. ellipsiformis (Conrad) ... 



27 Alasmidonta calceola (Lea) . 



28 A. truncata (Wright) 



29 Unio gibbosus Barnes 



30 Quadrula solida (Lea) 

















a 

















a 















X 

 X 

 X 

 X 

 X. 

 X 

 X 





X 









































X 



X 



X 



X 



X 





X 



X 







31 Q. coccinea (Conrad) 



X 



X 



X 





X 



X 







a Lime lake. 



5 Chippewa creek. 



c Living, but not within a radius of 50 miles. 



Class GASTROPODA Cuvier 



Genus pleurocera Rafinesque. 1819 



Shell lengthened and conical, aperture moderately prolonged into 

 a short spout or canal in front. The columella is not thickened. 



Pleurocera subulare Lea (Fig. 161) (Philos. soc. Trans. 4:100) 



Shell large and heavy, elevated and turreted, having an 

 acute apex; nine to 11 whorls, flat, shouldered at the su- 

 ture, which is impressed; body whorl surrounded by three 

 ridges, the middle being the most prominent; aperture 

 small, lip thin, folding back over the columella and cover- 

 ing the umbilical tract. 



Locality. Goat island. 



Fig. 161 Pleu- 

 rocera subu- 



Genus goniobasis Lea. 1862 ^^'^ 



Shell heavy, elongated or ovate, aperture plain, slightly angulated 

 in front. 



Goniobasis livescens (Menke) Tyron 1873 (Fig. 162). M e- 

 lania livescens Menke (1830. Syii. nicth. p. 135) 



