108 U.S. NATIONAL MUSEUM BULLETIN 239 



Otia Conch., p. 90. Figured hole-type USNM 5934, exteriorly 



figured valve. 

 magellanica, Margarita: 1852, USEE, vol. 12, p. 192, pi. 14, fig. 



228, a-c (Orange Harbor [located on west side of Bahia Nassau, 



Tierra del Fuego], J. P. Couthouy), axis %, diam. % in.; 1862, 



Otia Conch., p. 225. 

 magellanica, Succinea: 1846, PBSNH, vol. 2, p. 185 (Tierra del 



Fuego), long. %, lat. % in.; 1852, USEE, vol. 12, p. 24, pi. 2, fig. 



22, a-c (abundant in moist places around Orange Harbor [located 



on west side of Bahia Nassau, Tierra del Fuego], J. P. Couthouy). 



Figured holotype USNM 5422; 2 paratypes MCZ 169237 ex NYSM 



174, original no. G 2642; paratype MCZ 216609 ex Smithsonian 



Inst, (printed label). 

 mahogani, Cyclostoma [Chondropoma]: 1842, BJNH, vol. 4, no. 1, 



back cover (Cuba [J. Bartlett]); 1843, PBSNH, vol. 1, p. 138: "... 



is Cyclostoma sagra D'Orbigny and C. pictum Pfeiffer" ; 1862, Otia 



Conch., p. 183. 

 manuana, Succinea: 1846, PBSNH, vol. 2, p. 185 (Manua), long. 



%, lat. 1.5 in.; 1852, USEE, vol. 12, p. 25, pi. 2, fig. 23,a-b (Manua 



Island, near the Society [Samoan] Islands, J. P. Couthouy) ; 1862, 



Otia Conch., p. 29. Figured holotype USNM 5423; 2 paratypes 



MCZ 216597 ex Smithsonian Inst, (printed label). 

 manubius, Unio Plate 32, fig. 5 



1855, PBSNH, vol. 5, p. 229 (Chihuahua [Mexico], sixty miles 



from Camp Ringgold, T. H. Webb), long. 3%, alt. 1%, lat. 1% in.; 



1862, Otia Conch., p. 218. Measured holotype MCZ 169447 ex 



NYSM 685, original no. A 6409; paratype MCZ 169448 from same 



NYSM lot; paratype USNM 85709 ex I. Lea coll. from Gould. 

 marcida, Mactra: 1850, PBSNH, vol. 3, p. 216 (Orange Harbor 



[located on west side of Bahia Nassau, Tierra del Fuego]), long. 



2%, alt. 2%, lat. 1% in.; 1852, USEE, vol. 12, p. 392, pi. 33, fig. 



505,a-b; 1862, Otia Conch., p. 76. Figured holotype USNM 



5892. 

 marcida, Vitrina: 1846, PBSNH, vol. 2, p. 181 (Madeira, Roche 



de Empena; height of 4200 feet, J. P. Couthouy), diam. 2 % , alt. 



y 40 in.; 1852, USEE, vol. 12, p. 7, pi. 1, fig. 12,a-c; 1856, ibid., 



Addenda and Corrigenda, p. 500: "Albers declares this to be the 



dead of immature V. nitida, while the animals are very different"; 



1862, Otia Conch., pp. 26, 244. Figured holotype USNM 5412. 

 marcidus, Trochus [Chlorostoma]: 1853, BJNH, vol. 6, p. 381, 



pi. 14, fig. 11 (Monterey [California], T. P. Green), axis %, diam. 



of base \)i in.; 1862, Otia Conch., p. 185. 

 marginata 'Couthouy' Gould, Peronia: 1852, USEE, vol. 12, p. 292, 



pi. 22, fig. 386, a-e (mouth of Orange Harbor [located on west side 



