m HELIX §. 19. 



418. Kochi Pfr Mon. I. p. 101. 



419. solitaria Say. (Coll. 187. — De Kay New-York 



.Moll. p. 't.s. t. .3. f. 41. — Chemn. ed. nov. I. 



p. 180. t. 2'.. — Pntula Alb. p. 64.) - - - 102. 



420. alternata Say. (Coll 188. — De Kaij New-York 



MoU. p. 29. t. 2. f. 9 — Chemn. ed. nov. I. p. 

 181. — Desh. in F6r. hist. I. p. 89. N. 122. — 

 Patula Alb. p 64. — H. scabra Chenu 1. c. t. 6. 

 f. 11 a. b.) - - - 102. 



421. H. ptychomphala Pfr. 



T. umbilicata, depresso-globosa, lenuis, superne conferlim 

 costulata, lineis concentricis paucis obsolele decussata, nitida, 

 castaneo-cornea; spira vix convexa; anfr. 4^^ — 5 vix con- 

 vexiusculi, ultimus non descendens, obsoietissime angulatus, 

 basi convexus, laevigatus, corneo-virens vel lutescens, circa 

 umbilicum mediocrem, pervium confertitTi plicatus; apertura 

 parum obliqua, irregulariter truncato-ovalis, altior quam lata; 

 perist. simplex, obtusum, margine columellari elongato, sub- 

 stricte descendente , superne fornicatim reflexo. — Diam. maj. 

 33, rain. 28, alt. 17 — 18 mill. (Mus. Cuming.) 

 Helix ptychomphala Pfr. in Proc Zool. Soc. 1851. 



— — Qmrm. ed. II. Heli.x N. 91 0. t. 1 40. f. H . 1 2. 



— ptycomphala Foj-bes in Voy. Raltlesnake. App. p. 371. 



Habitat ad Portum Essington; Cape Upstart Australiae (Mac- 

 gillivray). 



422. H. Strangei Pfr. 



T. late umbilicata, depressa, solidiuscula, superne con- 

 fertim costulato-striata , nitida, subpellucida, castaneo-cornea; 

 spira parum elevata, obtusiuscula; anfr. 5 vix convexiusculi, 

 ultimus depressus, basi sublaevigatus ; apertura subobliqua, 

 lunato-ovalis, intus submargaritacea; perist. simplex, rectum, 

 tenue, marginibus conniventibus. — Diam. maj. 24, min. 20, 

 alt. 10 — M mill. (Mus. Cuming.) 



Helix Strangei Pfr. in Proc. Zool. Soc 1848. p. 108. 



— — Pfr. in Zeitschr. f. Malak. 1848. p. 94. 



Habitat in Australia. («Brisbane Water, New-South-Wales « : 

 Strange.) 



423. H. tiara Mighels. 



T. umbilicata, convexiusculo-depressa, subtenuis, superne 

 arcuato-striata, lutea, strigis fulguralis rufis ornala, niiidula ; 

 spira plane fornicata, obtusa; anfr. 6 convexiusculi, lente ac- 

 crescentes, ultimus subteres, non descendens, basi vix striatus; 

 umbilicus magnus, conicus, Vg diametri superans; apertura 

 obliqua, lunato-rotundata, inlus subopalina; perist. simplex, 



