HELIX. 



15T 



Geographical Distribution. This shell was brought 

 from the Pacific coast bj the U. S. Exploring Expedition, 

 and was marked Oregon. 



"O" 



Remarks. At first sight this would not be distin- 

 guished from H. monodon.\^ But, besides coming from a 

 different zoological region, it has an imperforate, convex 

 base, like H. hirsuta, instead of the pitted umbilical- 

 region which ff. monodon has, whether perforated or not ; 

 and the hairs are much more sparsely distributed, being 

 not more than one-fourth as numerous. The basal por- 

 tion is less arcuated, so that the aperture is more trans- 

 versely elongated, and less properly cresceutic. — [g.] 



27. HELIX MAXIL,L,ATA, GOULD. 



Plate XL. a. Figure 2. 



H. testa parva, globoso-lenticulari, solidula, castanea, H. 

 hirsuta simili ; apertura lineari ; labro reflexo, integro prEe- 

 ter emarginationem dente obsolete divisam, fauce lamellam 

 sicut maxillam pone labrum gerente ; lamella columellari 

 recta, superne bifurcata. 



SYNONYMS AND REFERENCES. 



Helix maxiltata, Gould, Proc. Bo.si. Soc. Nat. Hist. III. 3S, July, 1S4S. 

 DESCRIPTION. 



Shell small, rather solid, of a rounded lenticular 

 form and pale chestnut color, resembling very closely 

 IT. hirsuta. Besides being considerably smaller, a close 

 VOL. II. 40 



