65 



E. CATALIN^. 



" 'Helix tenuistriata' W. G. Binney (as mutation of II. Gab- 

 bi), Land and fresh-water shells of North America, part 1, page 

 175, f 305, 1869; not of A. Binney, 1842. 



"Arionta Gabbi, W. G. Binney, U S Na mu b No. 28, 148, f 

 130, 1885. 



"This form was collected on Catalina Island by H. Hemp- 

 hill, arid, while obviously a member of the Gabbi -facta group, 

 seems perfectly distinguishable from the other members of that 

 group. There is a very large series of Gabbi and facta in the col- 

 lection of the National Museum, and, notwithstanding their varia- 

 bility I do not find any specimens which are not readily referred to 

 one or the other, and none intermediate between these and cata- 

 linae. The name tenuistriata had previously been used specifically 

 by A. Binney, and was repudiated for this shell by his son. As 

 the original tenuistriata A. Binney has never been identified, and 

 in the case of the present species the name v ould have to rest 

 anonymous, it seems better to apply a local name to it which is 

 free from any uncertainty. It has a small deep umbilicus partly 

 shaded by the reflected pillar lip and a broadly reflected peristome, 

 the ends of which upon the body are not approximated. It meas- 

 ures as follows: Alt. of shell 7, diam. 12, diam. aperture 4.5 mm. 

 There are 5J rounded whorls and the entire shell is finely spirally 

 striate. It is also found fossil on Santa Barbara Island, but the 

 fossil specimens are often considerably larger than the larger liv- 

 ing specimens now known; one measures 15 mm. in major diame- 

 ter and nearly 10 mm. in height.'*' — Dall, 103. 



E. ORCUTTL 



"Shell globose, moderately elevated, polished, with nearly 6 

 moderately convex whorls forming a dome-like spire; color pur- 

 plish brown, lighter toward the umbilicus; a narrow pale band on 

 the last whorl bordered behind by a darker brown, poorly defined, 

 similar band, both being above the periphery and the suture in the 

 earlier whorls being laid on the anterior edge of the darker line; 

 nucleus flexuously radiantly wrinkled, pale colored; subsequent 

 whorls with fine incremental wrinkles the ridges of which are cut 

 by revolving, partly obsolete incised lines; as a rule these lines are 

 not deep or continuous, cutting merely the tops of the wrinkles 

 and not the furrows between them; suture distinct, last whole 

 rounded, plump, toward the aperture descend ng below the pale 

 bund; base plumply rounded, the uml.ilicus covered by a reflection 

 of the pillar-lip with a minute chink behind it; aperture very ob- 

 lique, thickened, whitish, reflected, especially near the pillar; 



