CLASS GASTROPODA 
67 
Type in United States National Museum, No. 56056. Type locality, 
San Diego, California. 
Range. Known only from type locality. 
Epitonium barbarinum Dali, 1919 
Proceedings of the United States National Museum, 56:341. 
Shell small, imperforate, white, with eleven varices continuous up the 
spire which they one-third encircle; anterior surface of the varices flat- 
tish, smooth; the shoulder is not angular or spinose; there are six whorls 
exclusive of the (lost) nucleus; suture deep; base rounded without a 
basal cord or disk; aperture subovate, the inner lip thickened. Height 
of shell, 19; of last whorl, 7.5; of aperture, 4; diameter, 6.5 mm. (Dali.) 
Type in United States National Museum, No. 46229. Type locality, 
San Diego, California. 
Range. San Diego, California, to Panama. 
Family JANTHINIDAE 
Genus JANTHINA Bolten, 1798 
Shell thin, translucent, trochiform; nucleus minute, stylifonn; sinis- 
tral; whorls few, rather ventricose; aperture four-sided; columella tor- 
tuosus; lip thin, notched at the outer angle. Base of the shell deep violet, 
spire nearly white. (Tryon, Structural and Systematic Conchology.) 
Type. Janthina communis Lamarck. 
Distribution. Atlantic and Pacific Oceans. 
Janthina globosa Swainson, 1822 
Zoological Illustrations, Series I, 2: PI. 85. 
I. testa ventricosa, basi producta; apertura longiore quam latiore; labio 
exteriore laviter emarginato. 
Shell ventricose, the base lengthened; aperture longer than broad; 
outer lip slightly emarginate. (Swainson.) 
Diameter, 1.5 in. (Tryon, Manual of Conchology .) 
Type in British Museum? Type locality not known to writer. 
Range. Puget Sound to Gulf of California. Pelagic. 
Janthina exigua Lamarck, 1822 
Histoire naturelle des animaux softs vertebres, Series I, 6:206. Tryon, Manual of 
Conchology, 9: 37; PI. 10. 
Ianth. testa conico-turbinata, spira elata, suturis impressis, apice acuta, 
anfractibus rotundatis, concentrice lamellato-corrugatis, rugis medio 
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