a 
162 PUNCTUM PYGM4%UM MINUTISSIMUM. 
The sAw or mandible is said to be composed of sixteen long, slender, 
corneous laminee, all of which are recurved at their cutting edges ; the 
median segments are described as quite isolated, while the lateral lamine 
partially overlap each other. 
Fic. 222. Fic. 223. 
Fic. 222.—Mandible of Punctum minutissimum, highly magnified (after Morse). 
Fic. 223.—Half a transverse row of the radula of P. minutissimum, highly magnified (after Morse). 
‘he LINGUAL MEMBRANE is described by Morse as bearing fifty-four 
transverse rows of transparent horn-coloured teeth, each row composed of 
one median and twenty-six lateral or marginal teeth. ‘The median tooth 
is described as being the largest in the row, with one very small and rounded 
cutting-point ; the long and narrow laterals become even narrower as 
they approach the side of the membrane, and show two short and equally 
rounded cusps, increasing to three indistinctly reflected points towards 
the extreme margins of the membrane. 
The formula according to Morse is 13+1+13 x 54 — 1,458 teeth. 
Nearctic Distribution.—'This race is probably widely dispersed over 
the whole Nearctic region, but the records are as yet only fragmentary. 
BRITISH NORTH AMERICA. 
British Columbia—Vancouver’s Island (Rev. G. W. Taylor, Naut., 1891, p. 92). 
Manitoba—Winnipeg (A. W. Hanham, Nautilus, 1899, p. 3). 
Quebec—(Quebee, fairly common (A. W. Hanham, Nautilus, Jan. 1897). 
UNITED STATES. 
Alaska—P. pymeum tabulated for Alaska by Dr. Hermann Jordan. 
Alabama—Woodville, Jackson co. (Sargent, Nautilus, 1892, p. 77). 
California—San Francisco and Haywards, Alameda co. (Dr. J. G. Cooper). Lone 
Mountains (Binney, Terr. Moll., 1878, v., p. 412). 
Colorado—Willow Creek, Custer co., and Clouderoft, T. D. A. Cockerell. 
Indiana—Henry co. (E. Pleas, Nautilus, 1893, p. 69). 
Iowa—Jasper co. and Iowa city (H. Prime). Polk, Johnson, and Scott counties 
(Keyes, Bull. Essex Inst., 1888, p. 66). 
Maine—Abundant throughout the southern parts of the state. In one locality 
I counted eighty-three specimens on a single small leaf (E. S. Morse, l.c.). Rare in 
the north-east of the state (Nylander, Nautilus, 1900, p. 104). Bethel (E. W. Roper, 
Nautilus, 1890, p. 97). 
Massachusetts—Very common about Cambridge (E. S. Morse, l.e.). Local and 
very gregarious at Westport (J. H. Thomson, Journ. of Conch., 1885, p. 372). 
Michigan—Generally distributed throughout, and tabulated by Mr. B. Walker 
for eleven of the eighty-four counties into which the state is divided. 
Minnesota—Belle Lake, Wright co., at roots of grass on crown of bogs, and in 
leaf-mould on banks of a small rill by Clearwater Lake (Sargent, Naut., 1895, p. 89). 
New Jersey—Gloucester co. (W. J. Fox, Nautilus, 1891, p. 114). 
New Mexico—Sacramento Mountains, Otero co., and at Clouderoft, James 
Canon, at an altitude of 9,500 feet (E. J. Vanatta, Nautilus, Sept. 1902). 
New York—Found in 1871 at Litchfield in Herkimer co. by Dr. Brown. Rare 
at Plattsburg, G. H. Hudson, 1885. East Onondago eo., W. M. Beauchamp, 1885. 
Common in Cayuga Lake Valley (N. Banks, Nautilus, 1892, p. 138). Coldspring, 
Long Island (H. Prime, Nautilus, 1894, p. 70). 
North Carolina—Roan Mts. (Walker and Pilsbry, Proc. Acad. Philad., 1902). 
Ohio—Enumerated for Cincinnati by R. M. Byrnes. 
Pennsylvania—Allegheny co. (Stupakoff, Nautilus, 1894, p. 135). 
Rhode Island—Local and gregarious at Tiverton (J. H. Thomson, J. of C., 1.c.). 
Texas—Bosque co., H. W. Ericsson (Bland and Binney, Ann. N.Y. Lye., 1874). 
