OF CONCHOLOGY. 217 



Many shells are grouped most arbitrarily, without any refer- 

 ence to the animals and without any regard to their form. 



Thus, on p. 72, " H. Ayersiana " (misspelt) is put between 

 solitaria and strigosa, for what possible reason is a mystery ! 

 Compare it with fig. 301 and Dupetithouarsi (not with the copy 

 of Deshayes' fig.) 



Why '•'■ Byalina conspecta,'' p. 41, and '■^ Helix [Patula) Ma- 

 zatlanica,'' p. 82, while the animals are undescribed ? The jaw 

 of '■'■Binneia " (misspelt), p. 68, and teeth also, are more like 

 those oi Ai-ion, p. 276, than o^ Lwiax, p. 59, but hecause Avion 

 has an additional mucous gland these closely related slugs are 

 put far apart, and the Binneya connecting them with Helicidce is 

 misplaced because no record was made of its having such a mu- 

 cous gland ! Why is Toivnsendiana, p. 164, in Arionta f Co- 

 lumbiana and devia, pp. 150 and 152, in Mesodon? No mention 

 made of jaws or teeth. 



Compare fig. 285 with 251, p. 147, or 260, p. 152. " Colum- 

 bia R." for "JjT. arrosa " is one of the many errors of locality 

 which the authors have not seen fit to correct by the latest and 

 best authorities. 



^^ Helix cypreopJiila, Newc." (MS.), p. 166, the umbilicate va- 

 riety, need not have been mentioned, as Dr. N. admitted its 

 identity with tudiculata, and never published a description. The 

 specimens are mentioned by me in vol. iv, pp. 215 and 227, as a 

 variety. 



The ^^H. NicJcliniana" figured on p. 166, and by Dr. Binney, 

 is not the typical form, and is considerably narrower than the 

 size given in text, or Lea's shell, but higher, measuring I'OO, 

 0*55, 0*80 inch. It appears, however, to be a link between this 

 type and the small var. called nemorivaga, and is found near 

 San Francisco. 



'■''H. redimita," p. 167. The description and figure represent 

 the northern form like Californiensis, but Mr. Binney adheres to 

 the habitat as " San Clement I.," against which opinion I have 

 already given reasons. Greater diam. is "21, not '31 millim. 



I have nothing to add to the notes on intercisa, crebristriata, 

 exarata, reticulata^ Bridgesii, ramentosa or Californiensis already 

 given, except that the locality, "interior of California, Com. 

 Wilkes," given with the last, is certainly Avrong, the var. viiicta 

 which is figured being confined to Monterey, and the type to the 

 coast northward. Jaw figured with 5 ribs ; " only 4 " in text. 



"^. Carpenteri, Newc, including Bemondii, Tryon," p. 171. 

 The shell figured appears like a var. of rufocincta, and does not 

 agree with the dimensions given, which would form a much more 

 elevated shell, like the Bemondii of Guaymas. Dr. Newcomb 



