346 HELICES ADDENDAE. 



443^. H. kopnodes W. G. Binney. -{• 



«Testa depresso-globosa, corrugata, subtus laevigata; spira 

 brevis, depressa; sutura raediocris; anfr. 5, rapide accrescentes, 

 ultinius permagnus , ventricosus , interdum lineis volventibus 

 crassis notata; apertura magna, rotundata; perist. simplex, acu- 

 tum, marginibus approximatis, callo levi, brunneo conjunctis; 

 ad umbilicum parvum et profundum reflexiusculum. — Diam. 

 maj. 35, min, 28, alt. 13 mill. » (B.) 



Helix kopnodes W. G. Binn. in Proc. Acad. Philad. Oct. 1857. 

 Habitat Alabama (C. S. Hale). 



Obs. «Forsan fornia monslriiosa H. fiiliginosae, sed diiTert speci- 

 minibiis nieridionalibus colore, testa majori, solidiori, niagis globosa; 

 umbilico angustiori; apertura majori, magis rotundata, spira magis elevata 

 et lineis volventibus. Varietates alligantes non exstant. » 



443^. H. friabilis W. G. Binney. f 



« Testa globosa, papyracea, friabilis, subdiaphana, nitens, 

 rufescens; spira parvula, elevato-conica; anfr. 4, laeviter cor- 

 rugati, convexi, ultimus permagnus, ventricosissimus; sutura 

 mediocris; apertura circularis, parum alta et longa, intus livida, 

 callo levi albo sub-incrassata; perist. acutum, tenuo, siraplex, ad 

 basin reflexiusculum, violaceura, unibilicura parvura et profundura 

 aliquantum tegeus. — Diam. maj. 26, min. 20, alt. 13 raill. » (B.) 



Helix friabilis W. G. Binn. in Proc. Acad. Philad. Oct. 18 57. 

 Habitat in ripis flurainis Wabash et in Illinois. 



Obs. «Species rara, ad sectionem H. fiiliginosae referenda, sed testa 

 papyracea et rotundafa, spira elevata, et apertura circulari distincta.» 



462^. H. Vidaliana Morelet ct Drouet. -{■ 



« T. umbilicata, convexo-depressa, orbiculata, valde tenuis, 

 pellucida, nitida, tenere striata, corneo-rufescens, obscure ra- 

 diata vel nubilata; anfr. 6 — 6^2 parura convexi, sutura bene 

 discreti, priores angusti, ultimo magno, compressiusculo; aper- 

 tura obliqua , late lunaris ; perist. siraplex , acutura , tenue. — 

 Diara. raaj. 15, rain. 12, alt. 7 mill. » (Auct. ) 



Helix Vidaliana Morelet et Drouet in Journ. Conch. VI. 1 857. p. 1 48. 

 Habitat in insulis Azoris. 



Obs. Nonne var. major U. Migueiinae Pfr.? 



632 **. H. brumalis Morclet ct Drouct. •{■ 



« T. anguste urabilicata, tenuis , glabriuscula, lutescenti- 

 cornea, strigis flexuosis spadiceis radiata; spira vix eniersa; 

 anfr. 6 parura convexi , sensini crescentes ; apertura subrecta, 

 lunaris; perist. siraplex, raargine columellari leviter sinuato. — 

 Diam. raaj. 8, rain. 7, alt. Sy^ raill. » (Auct. ) 



