MOLLUSCA. 
569 
Helix (subg'enus Patula) solitaria (Say), ayersiana (Newcomb), strigosa 
(Gould), alternata (Say), as far north as Labrador, cumherlandiana (Lea), 
tennistriata (Binn.), cooperi (Binn.), idahoensis persp>ectiva (Say), 
striatella (Anthony), hornii (Gabb), mazatlanica (Pfr.), and asleriscus (Morse). 
Binney & Bland, h c. pp. 77-8-3. — JI. mazatlanica (Pfr.), found also at San 
Francisco. Cooper, Am. Journ. Conch, v. p. 201. 
Helix haydeniiy sp. n., Gabb, Am. Journ. Conch, v. p. 24, pi. 8. fig. 1, Utah. 
[This is a strange form, with strong spiral ribs, otherwise somewhat allied to 
H. cooperiP^ — Helix liemphillii, sp. n., Newcomb, ibid. p. 167, pi. 17. fig. 4, 
White-Pine Mining-district, at an altitude of 8000 feet. 
Helix ruderata (Stud.) ?, from Unalaschka, Cooper, 1. c. p. 202. 
Ammonitella yatesii has been figured as sinistral by oversight. Cooper, 1. c. 
[see Zool. Becord, v. p. 482], 
Helix ccecoidcs and H. hlakeana, spp. nn., Tate, Am. Journ. Conch, v. 
p. 156, pi, 16. figs. 2, 3, Nicaragua. 
Helix (subgenus Strohila) lahyrinthica (Say), Eastern North America, huh- 
hardi (Brown), Indiana. Binney & Bland, 1. c. pp. 83-86 ; the internal 
plaits of the first figured on p. 85. 
Helix (sul)g(mus Polygyra) auriculata (S(iy),uvidifera (Shiittl.), 
(Bland), postelliana (Bland), cfipiloca (Ravenel), avara (Say), ventrosula 
(Pfr.), hindsi (Pfr.), triodontoides (Bland), mooreana (Binn.), tholiis (Binn.), 
hippocrepis (Vh.)y fastiga)is (SB.j),jacksonii (Bland), troostia?ia (Lea), hazardi 
(Bland), oppilata (Moricand), only from Yucatan, dorfeuilliana (Lea), acu- 
tedentata (Binn.), septemvolva (Say), cereolus (Miihlfeld), carpenteriana 
(Bland), fehigeri (Bland), pustula (Fer,), puskdoides (Bland), and leporina 
(Gould), from the Southern United States. Binney & Bland, I c. pp. SO- 
US. 
Polygyrella is a new subgenus of Helix, discoidal, ribbed above ; two rows 
of three teeth within the last whorl ; peristome thickened, simple, margins 
joined by a pliciform elevated triangular plait. Only one species, H. polygy- 
rella (Bland), Coeur d’Alene Mountains, United States. Bland in Binney & 
Bland, 1. c. p. 112. 
Dcedalochila harfordiana, sp. n.. Cooper, Am. Journ. Conch, v. p. 196, 
Fresus County, California, 6500 feet above the sea. In fonn, size, and um- 
bilicus closely resembling Helix polygyrella (Bland), thus curiously connect- 
ing that anomalous species with Dcedalochila. Cooper, ibid. p. 214. 
Helix (subgenus Stenotrema') spinosa (Lea), labrosa (Bland), edgariana 
(Lea), edwordsi (Bland), harhigera (Redfield), stenotrema (F(5r.), hirsuta 
(Say), maxillata (Gould), germana (Gould), monodon (Rackett), with var. 
fraterna (Say) and var. /mw (Ward). Binney & Bland, 1. c. pp. 113-122. , 
Helix (subgenus Mesodoti) major (Binn,), albolabris (Say), divesta (Gould), 
mtdtilineata pennsylvanica (Green), mitchelliana elevata (Say), 
clarkii (Lea), christyi (Bland), exoleta (Binney), wheatleyi (Bland), dentifera 
(Binney), reemeri (Pfr.), thyroides (Say), buccidenta (Gould), clausa (Say), 
Columbiana (Lea), downieana (Lea), jejuna (Say), devia (Gould), profunda 
(Say), and sayii (Binney, not Wood, who gave no description). Binney & 
Bland, 1. c. pp. 135-164. 
Aplodon Columbiana (Lea). Jaw with eight broad ribs. Cooper, Am. 
Journ. Conch, v. p. 214. 
Helix (subgemis Triodopsis) palliata (Say), obstricta (Say), appressa (Say), 
1869 . [voL. VI.] 2 R 
