186 Annals of the Carnegie Museum. 



The surface markings consist of lines of growth and fine undulations 

 parallel to them. On the upper surface of the whorl they sweep gently 

 backward from the suture to the shoulder, then, after crossing the 

 angle, turn abruptly forward, passing about one third the way down 

 the side of the whorl, then turn back and run under the inner lip. 



One specimen is 75 millimeters high, another 44, and a third 66. 



Locality. — The species occurs in two localities south of the village 

 at Chazy, New York, and near the Normal School at Plattsburgh, New 

 York. The specimens shown on Plate XLVIII, figures 14-16, are 

 in the Yale University Museum. The original of figure 13, of the 

 same plate is in the Geological Museum of Williams College. 



Family Pleurotomariid/e d'Orbigny. 



Genus Lophospira Whitfield. 

 Lophospira subabbreviata (d'Orbigny). 



Marchisonia abbreviata Hall, 1847, Paleontology New York, Vol. I, 



p. 32, PI. 6, fig. 7 (not of de Koninck). 

 Murchisonia subabbreviata d'Orbigny, 1850, Prodrome de Paleon- 



tologie, Tome I, p. 8. 

 Murchisonia decurta Hall, 1877, American Paleozoic Fossils, S. A. 



Miller, p. 244. 



This species was described by Hall from a single specimen obtained 

 at Chazy, New York. The specimen was lost before Volume I, 

 Paleontology of New York, was issued, and as Hall's figure and 

 description are inadequate to define a species, the name will have to 

 be dropped. 



Lophospira rectistriata is fairly common at the locality from which 

 Hall's specimen was obtained, and, for that reason, the writer has 

 identified it with Hall's species in previous papers. Dr. Ulrich has 

 pointed out the impropriety of such a course, and it will probably be 

 best to abandon the name abbreviata entirely. 



Lophospira billingsi Raymond. 



(Plate XLIX, figures i, 2.) 



Lophospira billingsi Raymond, 1905, American Journal of Science, 

 Series 4, Vol. XX, p. 377. 



