140 U.S. NATIONAL MUSEUM BULLETIN 23 9 



retrorsa, Helix (Caracolla) Plate 38, fig. 10 



1843, PBSNH, vol. 1, p. 139 ([Tavoy,] British Burmah [Burma], 

 F. Mason), lat. 1%, alt. 1 in.; 1844, BJNH, vol. 4, p. 455, pi. 24, 

 fig. 5; 1862, Otia Conch., p. 189. Measured type, here selected, 

 lectotype MCZ 169330 ex NYSM 237, original no. A 708; 2 para- 

 types MCZ 169331 and paratype USNM 611233 from same NYSM 

 lot. Paratype MCZ 220663 ex BSNH 2642, original no. 4372 from 

 A. A. Gould. 



revularis, Ostrea: 1861, PBSNH, vol. 8, p. 39 (China Seas, as 

 indicated by shells adhering to it), diam. 60, lat. 10 mm.; 1862, 

 Otia Conch., p. 178. NPEE. 



rigida, Venus [Tapes]: 1850, PBSNH, vol. 3, p. 277 (Puget Sound 

 [Washington], Straits of [Juan] de Fuca, Mr. Case and Dr. Picker- 

 ing), long. 2, alt. 1%, lat. 1% in., also long. 3%; alt. 2%, lat. IK in.; 



1852, USEE, vol. 12, p. 420, pi. 37, fig. 538,a-b; 1862, Otia Conch., 

 p. 85. Figured holotype USNM 5923. 



See note by P. P. Carpenter, 1864, Rep. British Assn. Adv. Sci. 

 1863, p. 531. 

 rigida 'Gould' Carpenter, Venus: 1864, Rep. British Assn. Adv. Sci. 



1853, p. 584: not Gould, 1850 [nomen nudum], is Venus adamsii 

 Reeve. 



Rissolina, new subgenus: 1861, PBSNH, vol. 7, p. 401; 1862, Otia 

 Conch., p. 145. Type species, by subsequent designation: Rissolina 

 plicatula Gould, G. Nevill, 1885, Hand-list of Mollusca in the 

 Indian Museum, pt. 2, pp. 73, 77. 



rohusta, Vitrina: 1846, PBSNH, vol. 2, p. 181 (New South Wales, 

 Mr. Mitchell), diam. max. % alt. % in.; 1852, USEE, vol. 12, p. 10, 

 pi. 1, fig. ll,a-b; 1862, Otia Conch., p. 27. Figured by Cox, 1868, 

 Monograph Australian Land Shells, p. 84, pi. 20, fig. 17. "From a 

 painting by Angas of a specimen presented by Gould to the British 

 Museum," teste Iredale, 1937, Basic List of the Land Mollusca of 

 Australia, pt. 2, p. 9. 



rodgersi, Buccinum [Neptunea] Plate 11, fig. 2 



1860, PBSNH, vol. 7, p. 326 (Arikamcheche [Arakamchechen] 

 Island, Behring's [Bering] Straits, common in 20-30 fathoms, muddy 

 gravel, W. Stimpson; Arctic Ocean, north of Behring's [Bering] 

 Straits, Capt. Rodgers); long. 55, diam. 25 mm.; 1862, Otia Conch., 

 p. 122. Measured holotype MCZ 169338 ex NYSM 7, original no. 

 A 6307 presumed to be from latter locality; paratype MCZ 169339 

 from same NYSM lot. NPEE. 



rorata, Mitra: 1850, PBSNH, vol. 3, p. 171 (hab. ?, Mr. Walker), 

 long. %, lat. % in.; 1852, USEE, vol. 12, p. 272, pi. 20, fig. 354,a; 

 1862, Otia Conch., p. 72. Figured holotype USNM 5749. 



