29 



California Art & Nature 



30 



SPORTELLA CAL'PORNICA Dall. 



"Shell small, comprtssed, ruae, with a 

 yellowish epidermis; slightly arcuate, 

 dorsal margin evenly arched, base con- 

 cavely arcuats; inequilateral, the anterior 

 part longer, roundtd, the posterior end 

 more blunt; teeth normal, the larger 

 right cardinal nearly parallel with the 

 dorsal margin, the ligamentary nymph 

 obscure, the attachment for the resilium 

 thickened and projecting; scar of the 

 mantle w.de and somewhat irregular, the 

 anterior addtictor scar not well distin- 

 guished from it. Lon. 6, alt. 4.2, diam. 

 1.5 mm. A single rather worn right valve 

 war. collected on the beach at Monterey, 

 California, by Dall in 1S66."— Dall, U S 

 Na Mu pr 21: 885, 879 (1899), t 88 f 5. 



SUCCINEA GABBII Tryon. 



Tryon, Monog T M 22, t 2 f 14. 



Keep, West Coast shells, 129. 



Elongato ovate, thin, subpellueid, 

 coarfexy undulaiely striate; spire long, 

 a'u e, suture deeply impressed; whorls 

 nearly 4, but slightly oblique, very con- 

 VvX, the last 3-4 of the totaJ length; 

 aperture small, roundly oval, columella 

 wtU incurved. Light yellow. sh. Length 

 '.', d'.ameter 5 mm. Binney considers this 

 i. vj'rety of S. oregonensis. 



Living: Southeasern Oregon; north- 

 ea.;ern Ca.ifornia (W. M. Gabb). 



SUCCINEA HAWKINSII Eaiid. 



n rycn. Mong T M 28, t 2 f 31. 



Very narrow, sub-cylindrical, thin, ru- 

 gosely striate; spire very short, apex 

 mamillary; whorls 2%, suture not im- 

 pi- ssed; body very long and narrow, the 

 ridt'f! flattened, sub-parallel; aperture 

 narrow ovate, two-thirds the total length. 

 Viewed from the base exhibiting the in- 

 terior of the whorl to the apex, columella 

 slig'htly folded above, with a callous de- 

 posit Covered with a rather oblique 

 di.'k ye 1 w or orange epidermis. Length 

 1', diameter 5 mm. 



living: Wa-h ngton; Br.tish Columbia. 



SUCCINEA HAYDENI W. G. Binney. 



T'ryon, Monog T M 24, t 2 f 20. 



K^ei', West Coast shells, 128 f 118. 



t Icngate-oval, thin, shining; spire 

 Fhor', acute; whorls 3, convex, the last 

 m?.rked with wrinkles of growth, and 

 irregula.', heavy, spiral furrows; aprr":- 

 i r ■ oblioue, oval, five-sevenths the total 

 length, the lower margin considerably 

 fX' anded. Amber color. Length 21, 

 diarreter 9 mm.. 



Living: Nebraska and north. Utah. 



SUCCINEA LINE ATA W. G. Binney. 



Tryon, Monog T M 23, t 2 f 16. 



Oblong ovate, irregularly wrinkled, be- 

 t'"' Pen which are ccarse, remote, revolv- 

 ing lines; spire acute; whorls 3, very con- 

 vex; aperture Yz the length of the shell, 

 oval; columella folded. Length 12, di- 

 arpe'^er 6 mm. 



I iv'ng: Nebraska; British Columbia; 

 ncvitheastern California; Utah. 



SUCCINEA NUTTALLIANA 

 Tryon, Mong T M 26, t 2 f 26. 

 Keep, West Coast shells, 129, 



Lea. 



Cva'e conic, very thin, pellucid, shining, 

 t^ci-.ate: spire acu e, attenuate; whorls 

 revolving very obliquely; aperture two- 

 thirds the total length, ovate, broadly 

 rounded below, angled above; columella 

 without fold Light horn color or grey- 

 i.':h. Length 15, diameter 8 mm. 



Living: Snake river, Oregon; to Clear 

 Lake, California. 



SUCCINEA OREGONENSIS Lea. 



Tryon, Monog T M 23, t 2 f 18. 



Keep, West Coast shells, 129. 



Elongaled oval, thin, diaphanous, 

 shining;, striate; spire acute, suture well 

 impressed; whorls 3, well rounded: body 

 seven-eighths and aperture two-thirds 

 the total length; aperture ovate, one- 

 third longer than broad, columella arcu- 

 ate. Color deep orange or galden. Length 

 9, diameter 6 mm. 



Living: Vancouver Island to Baja Cal- 

 ifornia. 



SUCCINEA RUSTICANA Gould. 



Tryon, Monog T M 24, t 2 f 19. 



Elongate ovate, thin fragile, diaphan- 

 ou.<, irregularly striate; spire elevated, 

 acute, suture moderately impressed; 

 whorls o, not very convex; body long, 

 oval, not inflated; aperture narrowly 

 ovai, ttree-flfths the entire length. Pale 

 greenish or yellowish. Length 14, diam- 

 eter 7 mm. 



Living: Nevada; Vancouver Island, to 

 Baja California. 



SUCCINEA SILL IMA NI Bland. 



Tryon, Monog T M 24-25, t 2 f 21. 



Kfe,«, West Coast shells, 129. 



Obiong-ovate; thin, coarsely striate, 

 shining; spire short, acute, suture im- 

 presfed; whorls 3, convex, much flat- 

 tene<I superiorly; at erture obi qje, 

 elongate oval, angular above, effuse at 

 1 a- •, cclumella f1 ghtly arcuate, with a 

 threa'-llk'i thickening above. White? 

 Length 20, diameter 8.5 mm. 



Liv.ng: Humboldt Sink, Nevada, to 

 San Jcaquin \a ley, California; Washing- 

 ton. 



TRUNCATELLA CALIFORNICA Pfr. 



Cylindrical Imperforate, thin, trans- 

 lucent, slightly striate; whorls 6-10, quite 

 conve?;. last not carlnate below; apert- 

 ure vertical suboval, lip simple, contin- 

 uou:v si. ghtly expanded. Amber colored. 

 Length 4.C, diameter 1.6 mm. 



Living: San Dlfgo, Cal.fornia. 



TURTONIA MINUTA Fabricius. 



"Bering Sea to the Shumagins. Pre- 

 cisely similar to Eironean and New Eng- 

 land specimens."— Dall U S Na Mu pr 

 21: 881 (1899). 



TURTONIA OCCIDENTALIS Dall. 



"Plover bay, Bering Strait, and north- 

 ward, in 20 to 40 fathoms."— Dall U S Na 

 Mu pr 21: 881 (1899). 



Larger, stouter, and shorter than T. 

 mlnuta. 



SERRIDENS OBLONGA Cpr. 



Dall U S Na Mu pr 21: 8880 (1899). 

 San Pedro, California. 



