168 U.S. NATIONAL MUSEUM BULLETIN 2 39 



vidua, Avicula [Meleagrina]: 1850, PBSNH, vol. 3, p. 309 (Feejee 

 [Fiji] Islands), long. 1%, alt. %, lat. Ko in.; 1852, USEE, vol. 12, 

 p. 439, pi. 39, fig. 553,a-b; 1862, Otia Conch., p. 89. Figured 

 holotype USNM 5938. 



vidua, Littorina: 1859, PBSNH, vol. 7, p. 138 (Ousima [Amami-O- 

 shima, Ryukyu Islands]), axis 7, diam. 4 mm.; 1862, Otia Conch., 

 p, 110, NPEE. 



villica, Cylichna Plate 7, fig. 2 



1859, PBSNH, vol. 7, p. 139 (China Seas, W. Stimpson), axis 3, 

 diam. 1.5 mm.; 1862, Otia Conch., p. 112. Possible holotype 

 USNM 418, figured by Yen, 1944, Proc. California Acad. Sci., 

 ser. 4, vol. 23, p. 580, pi. 51, fig. 53. It actually measures: axis 3.2, 

 diam. 1.5 mm. Yen says: " Judging by the expression 'utroque 

 aubconica' it does not seem to be quite exact. It is truncate and 

 flat on top, obtusely angulated at the shoulder, and somewhat 

 reduced at the base. The lateral outline is gently convex." 



villica, Rissoina Plate 45, figs. 1, 2 



1861, PBSNH, vol, 7, p. 401 (Loo Choo [Okinawa, Ryukyu Islands], 

 and Kikaia [Kikaigashima, Ryukyu Islands], W. Stimpson), axis 6, 

 diam. 3 mm.; 1862, Otia Conch., p. 145. Lectotype, here selected, 

 MCZ 169424 ex NYSM 92, original no. G 2468, labeled "Loo 

 Choo"; paratype MCZ 225220; paratype "?" USNM 1039; paratype 

 USNM 7508. NPEE. 



vinosa, Physa: 1847, PBSNH, vol. 2, p. 263, text fig. (Lake Superior 

 Region, C. T. Jackson), long. %, lat. V 2 in.; 1850, in Agassiz, Lake 

 Superior, p. 244, pi. 7, figs. 10-11 (north shore of Lake Superior 

 at Michipichotin [Michipicoten Harbor]); 1862, Otia Conch., 

 p. 201. Possible syntype MCZ 85809 ex W. G. Binney, labeled 

 "Type"; syntype MCZ 272998 ex W. G. Binney. 



It is probable that these specimens were the ones subsequently 

 collected by Agassiz and are not from the original lot. 



violacea, Atlantica: 1852, USEE, vol. 12, p. 493, pi. 51, fig. 599,a-b 

 (found in the stomach of a Bonito, lat. 30° S., long. 20° W., fig- 

 ured by Mr. Drayton), long, integ. %, lat. # 2 in.; 1862, Otia Conch., 

 p. 236. 



virgata, Physa Plate 44, fig. 5 



1855, PBSNH, vol. 5, p. 128 (Gila River [Arizona] and near San 

 Francisco [California], T. H. Webb), long. %, lat. % in.; 1862, 

 Otia Conch., p. 43. Lectotype, here selected, MCZ 72995 ex W. G. 

 Binney; 8 paratypes MCZ 85812 and 225226 ex T. H. Webb. 



virginea, Columhella Plate 8, fig. 16 



1860, PBSNH, vol. 7, p. 335 (China Seas, W. Stimpson), axis 4, 

 diam. 1 mm.; 1862, Otia Conch., p. 131. Lectotype, here selected, 

 USNM 382, figured by Yen, 1944, Proc. California Acad. Sci., 



