1918 ] Packard: Molluscan Fauna from San Francisco Bay 313 
The species Trochus mocstus Jonas, a South American form, has 
been inadvertently listed from San Francisco. 
Range.—Sitka, Alaska, to San Diego, California (Cooper). 
Tegula montereyi (Kiener) 
Trochus montereyt Kiener (1834-1856), pl. 33, figs. 1, la; Pilsbry (1889), 
p- 171, pl. 27, figs. 27, 28. 
Chlorostoma montereyi, Blankinship and Keeler (1892), p. 153. 
Description.—Pilsbry characterizes this species as follows: 
**Shell umbilicate, strictly conical, rather thin, light olivaceous or pale 
corneous; spire conical, with nearly straight outlines; apex acute; sutures linear; 
whorls 7; flattened, encircled by numerous fine lines, which become obsolete on 
the lower whorl which shows usually very ill defined obliquely descending 
small folds, at right angles to the incremental striae; body whorl acutely 
angular at the periphery; base flat, spirally lirate; aperture subhorizontal; 
outer lip thin, margined with brown or corneous; coiumella subhorizontal, 
curved, toothed below middle, receding above, not spread around the umbilicus 
as in the other species; umbilicus funnel-shaped, rapidly becoming very narrow, 
white within, its edge defined by an angle.’’ 
This species was reported from the Farallon Islands by Blanken- 
ship and Keeler. 
Range—Bolinas Bay to San Nicolas Island, California (Pilsbry). 
Margarites Leach* 
Margarites lirulata Carpenter 
Margarita lirulata Carpenter (1863), p. 653; (1865a), p. 61; Dall (1871b), 
p. 128; Pilsbry (1889), p. 296, pl. 65, figs. 81, 82, and 87. 
Gibbula parcipicta Carpenter (1863), p. 653. 
Gibbula succinecta Carpenter (1863), p. 653. 
Description.—Pilsbry (1889) described this species in the following words: 
“‘Shell umbilicate, globose-conical solid, lusterless or slightly shining, pur- 
plish, unicolored, or with large radiating white patches above, or around the 
periphery, or spiral darker lines, or spiral articulated lines. Surface either 
with (1st) a few (2-4) strong lirae above, their interspaces smooth, the base 
with about 8 concentric lirulae, or (2nd) more numerous narrow irregular lirulae 
above, those of the base still smaller, or (3rd) the spiral sculpture obsolete, 
surface smooth or nearly so above and beneath. The spire is more or less 
elevated, apex obtuse; suture impressed, sometimes sub-canaliculate; body- 
whorl convex beneath; aperture oblique, oval-rhomboidal, very brilliantly iri- 
descent within, but the acute peristome has a rather broad marginal band of 
opaque white; columella simple, umbilicus tubular, with incremental striae 
within.’’ 
This species is listed by Carpenter (1863) under the name of 
Gibbula succincta from San Francisco and the Farallon Islands. Not 
obtained by the Survey. 
*For authority for changing the spelling of the genus see Dall (1915b, p. 112). 
