UNIVEESALLY DISTRIBUTED 8Pr.CIi:S 67 



The peculiarity of the lingual of this species is the great development 

 of the central tooth. (See also Z.ferreus.) 



The jaw also is peculiar in having vertical channels worn upon its 

 anterior surface, extending down to the cutting mar- ^_ J"^- ~-^ 



gin, as in Z. ferreus. These channels are probably ^ **^ ~-^ 



worn by the greatly developed central tooth of the ' (Moiseo 

 lingual membrane. I do not agree wih Morse in considering the great 

 development of the central tooth and the channels on the jaw as generic 

 characters. 



Subgenus CONULUS (Fitz.) Moq.-Tand. 



Animal (of Z.fulrus) bluish black upon the head, neck, and eye- 

 peduncles, lighter on the sides and base; foot very narrow, thread-like. 

 A distinct caudal mucus pore. 



Shell imperforate, or very narrowly perforate, turbinate, arcti-spiral; 



■whorls 5-(), rather convex ; aperture depressed-lunar, the penultimate 



whorl strongly excided, somew^hat oblique. Peristome with margins 



separated. 



Zonites fiilviis, Draparnaud. 



Shell imperforate, subconical, thin, pellucid ; epidermis ^'^ ^e. 

 smooth, shining, minutely striated, amber-colored ; whorls 5 

 or 6, rounded, very narrow; suture distinct and deep; aper- 

 ture transverse, narrow; peristome simple, acute; base con- 

 vex; umbilical region indented, umbilicus closed. Greater 

 diameter 4"'^, lesser 3A"^™ ; height 3™". z /ui^s. en- 



larged. 



Helix chersina, Say, Jour. Phila. Acad., ii, 15G (1821); Binney's ed. 18, 81. — Binney 

 Bost. Jonrn. Nat. Hist., iii, 416, pi. xxvi, fig. 3 (1840); Terr. Moll., ii, 

 243, pi. xvii, fig. 4.— Gould, ruvi'itebrata, 18.'>, fig. 105 (1841). — Adams, 

 Vermout Mollusca, 162 (184-^); Sillim. Jouru. [i], xl, 273.— DeKay, N. Y. 

 Moll., 44, pi. XXXV, ^g. 338 (1843).— W. G.' Binney, Terr. Moll., iv. 119.— 

 Morse, Amer. Nat., i. 544, fig. 38 (1867). 



Relix eyena, Say, Jouru. Phila. Acad., v, 120 (1825) ; Binney's od. 30.— DeKay, N. Y. 

 Moll., 45 (1843).— Chemnitz, cd. 2, i, 237, pi. xxx, figs. 19-21 ? (1846). —Reeve, 

 Cou. Icou., No. 12C3 (1854). — Pfeiffer, Mou. Hel. Viv., i, 31, uofc of Gould 

 iu Terr. Moll. 



Helix ftilva, Draparnaud, Mighels, Bost. Jouru., iv, 333.— Chemnitz, Pfeiffer 

 (Muu. H., i, 30), Reeve, Forbes and Hanley. 



Conulus chersinus, Morse, Jouru. Poril. Soc.,i, 19, figs. 44, 46; j)!. ii, fig. 4; pi. vii, 

 fig. 45(1864). 

 Conulus chersina, Tryon, Am. Journ. Couch., ii, 256 (1866). 



Hyalina fulm, W. G. Binney, L. & Fr. W. Sh., i, 46, fig. 73 (1869). 



HyaUita chersina, Gould aud Binney, luvert. of Mass., new ed., 402 (1870). 



Zonites fulfils, W. G. B., T. M. V., 125. 



A circumpolar species, common to the three continents. It appears 

 to inhabit all of the Eastern Province, having been found from Great 



