CLASS GASTROPODA 
267 
Alectrion insculptus Carpenter, 1864 
Plate 26, fig. 12 
Proceedings of the California Academy of Sciences, 3:223. Tryon, Manual of 
Conchology, 4; PL 12, fig. 154. 
N. t. satis elevata, compacta, tenuiore, elegantissima, marginibus spira 
subrectis; albescente, rufo-carneo varie maculata; anfr. nucl. iv. laevibus, 
normaliter augentibus, apice minuto, satis extante; norm. v. subrotundatis, 
suturis satis impressis; apertura subrotundata, canali acute reflexa; tota 
superficie sulculis aequidistantibus, quarum x. anfr. penult, apparent, in- 
sculpta; anfr. norm. ii. primis costulis quoque radiantibus; labio valde 
calloso, supra basin seu parietem expanso, baud extante, intus ruguloso. 
Long., 0.80; long, spir., 0.43; lat., 0.46 mm. (Carpenter.) 
Shell small, conical; spire elevated; apex subacute; whorls seven, 
nearly flat, but obliquely truncated near margin; sculpture consists of 
numerous fine, spiral furrows, which are most prominent on lower portion 
of body-whorl; four upper whorls have prominent transverse ridges; 
aperture subquadrate; outer lip thickened by a slightly denticulated ridge; 
inner lip in-crusted slightly, but spiral ornamentation shows through the 
incrustation; columella short and separated from body-whorl by deep, 
narrow groove; canal short, broad, curved. (Arnold.) 
Type in State Collection. Type locality, Catalina Island, in 3-40 
fathoms. 
Range. Point Arena, California, to Cerros Island, Lower California. 
Fossil: Pleistocene, San Pedro, California. 
Alectrion insculptus eupleura Dali, 1916 
Proceedings of the United States National Museum, 51:576. 
In this form the axial ribs, which in the type are only indicated at 
the suture, are prolonged over the periphery of the last whorl to the base. 
Type in United States National Museum, No. 209046. Type locality? 
Range. San Simeon, California, to Cerros Island. 
Alectrion tegulus Reeve, 1858 
Plate 26, fig. 10 
Conchologia Iconica, 8; PI. 15, fig. 98. 
Nass. testa ovato-conica, subgibbosa, laevi, nigricante-cinerea, fascis 
lutescente cincta; spira breviuscula, acuta; anfractibus superne angulatis, 
ad angulum tuberculatis; apertura parva, columella arcuata, callositate 
tenui repando, labro crasse varicoso. (Reeve.) 
[2671 
