80 BULLETIN OF THE 



> Crepipatella Lesson, Voy. de la Coquille, t. II. p. 389 et seq., Atlas, PL II. fi<r. 



4 a, 1830. 111. Zool., pi. 42, 1831. (C. Adolphei Less.). Broderip, Trans. 

 Zobl. Soc, I. p. 202, 1835, H. & A. Adams, Gen., I. p. 369, 1854. 

 < Calyptroca Broderip, Trans. Zool. Soc., I. p. 195, 1835. 



> Crepidipatella Agassiz, Nom. Zool., 1847 ; corr. v. Crepipalella. 



> Crepidopalella Herrraannsen, Ind. Gen. Mai., II. Suppl., p. 38. = Crepidipatella 



Agass. emend. 1852. 



> Lephyrolobus Schluter, Syst. Verz., p. 26, 1838 (fide H. & A. Adams). 



? Lepyrolobus Schluter, loc. cit. Both genus and type undescribed, mere catalogue 

 names. Marschall, Nom. Zool., p. 124, 1873. 



> lanachus Moerch, Cat. Yoldi, p. 146, 1852 (/. plana Say). No description. H. 



& A. Adams, Gen. Rec. Moll, I. p. 369, 1854. 

 = Crypta H. & A. Adams, Gon. Bee. Moll., I. p. 368, 1854. 



?-|- Ergoza H. & A. Adams, loc. cit., p. 370, 1854 (E. plana Ad. & Rve. Voy. Sam.). 

 Crepidula Gray, Guide, p. 115, 1857 -f- 



Gamotia Gray, loc cit., p. 117, 1857. {Crepidula adunca Sby.) 

 = Crepidula Troschel, Gebiss der Schn., I. p. 159, 1863. 



> Spirocrypta Gabb, Pal. California, I. p. 136, 1864. (C. pileum G., loc cit., pi. 

 29, fig. 233 a, b. Cret. Cala.) Subgenus of Crypta (Humplir.) Gabb. 



This well-marked group has passed through the fluctuations of most well- 

 known genera by being divided into a number of sections which further 

 research has shown to be hardly more than specific modifications, and it would 

 seem as if the time had arrived to concentrate within nearly its original limits 

 the mass of species which have been set apart from one another on merely 

 transitional characters incapable of exact limitation. 



Crypta Humphrey was never characterized and has no just claims to recogni- 

 tion under the rules governing zoological nomenclature. It moreover appears 

 to have contained representatives of several genera, but no descriptions are 

 given, and his species cannot be positively recognized. 



Crepidula protea D'Orbigny. 



C. protea D'Orbigny, Sagra, Moll. Cuba, II. 192, PL XXIV. figs. 30 - 33. 



Specimens which are doubtless the species named as above by D'Orbigny 

 were found attached to dead shells, and even to pieces of coral, from several sta- 

 tions varying in depth from 80 to 450 fms. Also a few small specimens re- 

 sembling C. (lanachus) plana Say, but not determinable. 



GENUS TRIFORIS Deshates. 



Triforis (Ino) longissimus n. s. 



Shell much plongatfid, sinistral, lubcylindrical, yellowish white, polished 

 with more than twenty-two axiallv flattened, tathei obliquely twisted whorls, 



bearing three spiral rows of small pnintnl tubercles, fourteen (on the smaller) 

 August 25, 1881. 



