711 



Pleu. 



Pleurotomaria labrosa, Hall, Pal. N. Y., Vol. 3, 1861, 



^cL P^g^* ^3^5 plate 57, 

 fig. 6^, profile view 

 looking at the back 

 of a specimen from 

 the Belthyris shaly 



Hall "^^^^^®^^^^^S#|^^^^^ {Lower Helderlerg) 

 hV^..^^^^^^^^^^^^^ y^ limestone of Albany 

 FLLflL -^^^ /'^•^•Oo., N. Y. Outer 



surface appears like a net work ; all specimens more or less dis 

 torted. Species closely resembles P. halteata, Phillips, in the 

 English Wenlock formation. — VI. 



Pleurotomaria laphami, Whitfield, 1878.— F J. 

 Pleurotomaria laurentina, Billings. Geol. Can. 1863, 



page 117, fig. 28, a, 5, a small specimen, the dotted lines show- 

 ing the elevation of the spiral in other specimens; 28 c^ rf, 

 other specimens. Caldferous sandstone formation. II a. 



Pleurotomaria leavenworthana. See Cyclonema leaven- 

 w^orthana. ^XI. 



Pleurotomaria lenticularis. See Raphistoma lenticu- 

 laris. // c. 

 Plexirotomaria lineata.^ Hall, (now Pleurotomaria itys, 

 VIK.C/ W*f_ eeeI11ust.Dev.Fo88. 1876.) {Turlo 



lineatus., Hall, Geol. 4th District, N. 

 fpl-^ Y., 1843, page 193, fig. 79, 1.) 15th 

 M/^^^/S'^/^i. Annual Eeport, 1862, page 44, plate 

 5, fig. 3. Varies in form and proportion from com- 

 • * pression, etc. Usually as casts in the top Hamil- 

 ton shales of middle New York, not seldom encrusted with 

 bryozoa or corals. VIII c. 

 P. litorea, Hall; P. lonensis, Walcott. — lie. 



18 



