112 TERRESTRIAL AIR-BREATHING MOLLUSKS. 



and almost imperceptible oblique stria? ; aperture not dilated, its transverse 

 diameter the greatest ; umbilicus moderate, regularly rounded, deep ; base 

 rounded, thickened within by a testaceous deposit, bluish-white ; peristome 

 simple, acute. Greater diameter 13, lesser 11| mill. ; height, 5 mill. 



Helix cellaria, Muller, Hist. Verm., II. 28. — Pfeiffer, Mon., I. 111. — Bin- 

 ney, Bost. Journ., III. 421 ; Terr. Moll., II. 230, PI. XXIX. Fig. 4.— Gould, 

 Inv., 180, Fig. 104, exel. syn. ? (1841). — DeKay, N. Y. Moll., 37, PI. III. 

 Fig. 35 (1843). — Leidy in Terr. Moll. U. S., I. 233, PI. VII. Fig. 1 (1851), 

 anat. — W. G. Binney, Terr. Moll., IV. 111. 



Eyalina cellaria, Morse, Journ. Portl. Soc, I. 12, Figs. 18, 19, PI. V. Fig. 20 

 (1864). — Tryon, Am. Journ. Conch., II. 249 (1866). —Morse in Am. Nat., I. 

 541, Fig. 29 (1867). — W. G. Binney, L. & Fr.-W. Sh., I. 30 (1869).— 

 Gould and Binney, Invert, of Mass., ed. 2, p. 395 (1870). 



Helix glaphyra, Say, Nich., Encycl., Am. ed., PI. I. Fig. 3, 1816 ; Binney's ed. 

 7, PI. LXIX. Fig. 3. — Eaton, Zool. Text-Book, 194.— Bland, N. Y. Lye. 

 Ann., VI. 352, not of Pfeiffer, Reeve, Desha yes. 



An European species, introduced by commerce into Philadelphia, Astoria, 

 N. Y., Connecticut, Providence, Newport, R. I., Boston, Salem, Lynn, Marble- 

 lead, Portland, Halifax. It is common in cellars and gardens in Boston. It 

 has also been carried to Australia. 



Animal : upper surface light indigo blue, darkest on the head, neck, and eye- 

 peduncles, collar greenish, eyes black ; foot narrow and slender, not much 

 exceeding in length the diameter of the shell, terminating acutely. A distinct 

 locomotive disk, longitudinal furrows above the margin of the foot, uniting over 

 a longitudinal mucus pore 1 of the same nature described under Z. fuliginosus 

 (p. 98). 



Jaw strongly arcuate, ends bluntly rounded ; centre of anterior surface 

 slightly striate ; lower margin smooth, with a median projection. 



Lingual membrane quite peculiar ; the figure (PI. II. Fig. G) shows one 

 half of one transverse line with the median tooth; 14 — 1 — 14 teeth. The 

 central tooth has side cusps, but not cutting points, as in Z. IcBvigatus. There 

 can hardly be said to be one perfect lateral, the first side tooth being peculiar 

 in having an inner side cutting point instead of the usual outer side cusp and 

 cutting point. The second side tooth is like the first, the third is decidedly 

 modified, the fourth is a true marginal of the usual aculeate form. 



The figures of dentition of the foreign form (by Lehmann, Lindstrbm, Sem- 

 per, etc.) agree with mine. 



I am not aware of this peculiar dentition having been noticed in any other 

 species but alliarius. 



1 No mention of the caudal pore is made by Draparnaud, Moquin-Tandon, Forbes and 

 Hanley, Reeve, Gray, or Gwyn Jeffreys. It is also overlooked in Semper, Phil. Archip. 



