30 Mr. W. H. Benson on some Helices 



cular aperture, which reminds the observer of that of H. spiri- 

 plana, and the more remarkable sculpture, in which the crumpled 

 wrinkles are again obsoletely punctate. It seems to have some 

 characters in common with the larger species H. Janellei, Le 

 Guill., an inhabitant of Northern Australia. 



2. Helix Tescorum, nobis, n. s. 



Testa imperforata, globosa, oblique striata, albida, solidiuscula, spira 

 convexa, suturis impressis, apice obtusiusculo ; anfractibus 5, ul- 

 timo antice descendente, veutricoso ; apertura obliqua, rotundato- 

 lunata, peristomate expansiusculo, intus leviter incrassato, margine 

 columellari dilatato, appresso, pallida luteo. 



Diam. major 20, minor 18, axis 14 mill. 



Hub. cum preecedente ad simmi Shark's Bay. 



The single specimen which I have of this shell is apparently 

 in a subfossil state; and, in finer condition, may possibly exhibit 

 more colour. It has quite the habit of the European group 

 Archelix of Albers, and is closely allied to the Madeiran H. punc- 

 tulata, 

 fi^T/j^ 3. Helix cygnea, nobis, n. s. 



Testa late umbilieata, orbiculato-depressa, cornea, costulis radiatis 

 obliquis remotiusculis muuita ; spira vix convexiuscula, suturis 

 excavatis, apice planato ; anfractibus 4^ convexis, ultimo rotundato ; 

 apertura subverticali, rotundato-luuata ; peristomate acuto ; umbi- 

 lico perspective. 



Diam. major 4, minor S\, axis 1|- mill. 



Hab. ad vicum Perth, Fluvii Cygnorum Australiae Occidentalis. 

 Teste Dr. J. F. Bacon. 



Distinguished from H. suhlesta by the more distant ribs, wider 

 umbilicus, colour, and larger size ; from H. Juloidea, Forbes, of 

 the eastern coast of Australia, by its more distant ribs and want 

 of concavity on the upper side. 



/f..^^ 4. Helix sublesta, nobis, n. s. 



Testa sublate umbilieata, orbiculato-depressa, supra rufo-cornea, sub- 

 tus cornea, minutissime costulato-striata, superne planiuscula, su- 

 turis impressis ; anfractibus 4, ultimo depressiusculo, rotundato ; 

 apertura verticali, rotundato-lunata ; peristomate acuto ; umbilico 

 perspectivo. 



Diam. major 3, minor 2\, axis 1 mill. 



Hab. prope urbem Freemantle Fluvii Cygnorum. 



Differs from H. Juloidea, Forbes, by its narrower umbilicus, 

 and the want of concavity in the spire ; from H. cygnea by the 

 first-mentioned featiu'e and the sculpture. It is }iear]Y allied to 



