1869.1 119 [Perkins. 



ner lateral teeth broad and serrate at the tip, with one large, trian- 

 gular denticle ; outer lateral teeth simple. 





MEASUREMENTS. 



Length of shell 



27 mill. Breadth 30 mill. 



" foot 



50 " 



" tentacles 



11 " u 3.2 mill, at base. 



" operculum 



20 " " 13 " 



The large urn-shaped egg masses of this species, composed of ova 

 and agglutinated sand, are found most frequently in April and May. 



SCALARIADJE. 



Scalaria Lam., 1801. 



Scalaria multistriata Say, Am. Conch., pp. 19 and 180, pi. 

 xxvii, 1826; Gould, Invert. Mass., p. 251; De Kay, Moll. N. Y., 

 p. 126. 



Very rare. 



Scalaria lineata Say, Am. Conch., pp. 83 and 180, pi. xxvii, 

 1822; Gould, Invert. Mass., p. 251; De Kay, Moll. N. Y., p. 126, pi. 

 vi, fig. 125; Chenu, Man. de Conch., Vol. i, p. 217. 



One of the rarest species found here. The only specimens I know 

 of were collected by Prof. A. E. Verrill and Dr. E. T. Nelson. 



PYRAMIDELLID^. 



Odostomia Flem., 1848. 



Odostomia bisuturalis Stimps., Check List, 1860. Chemnitzia 

 bisuturalis Stimps., Proc. Bost. Soc. Nat. Hist., Vol. iv, p. 16, 1851. 

 Turritella bisuturalis Say, Am. Conch., p. 84, 1822. Jamina exigua 

 Couth., Bost. Journ. Nat. Hist., Vol. n, p. 92. Odostomia exigua 

 Gould, Invert. Mass., p. 272, fig. 177. 



Not uncommon on rocks and timber near low water. Animal 

 white; tentacles not long, triangular, tapering to a blunt point; eyes 

 between, and a little behind the tentacles; rostrum short, rounded in 

 front; foot long and narrow, straight before and slightly auricled, 

 rounded behind, contracted in the middle; operculum corneous, straw 

 colored. 



