160 DOLABELLA. 



examples. Two of the original lot collected by Fisher are before 

 me, the smaller one being drawn in my figure, and another specimen 

 of a dark olive color, collected by Dr. W. H. Jones on the " west 

 coast of Mexico," has also been examined. 



D. GUAYAQUILENSIS (Petit) Sowerby. PI. 64, figs. 1, 2. 



Shell small, thin, wide, oblong, rather straight, with margin 

 scarcely reflected; back striated : callus small, narrower, tumid, not 

 continued upon the margins; epidermis pale gray. (Sowb.~) 



Guayaquil (Brit. Mus.) 



D. guayaquilensis Petit, SOWERBY, Conch. Icon., xvi, pi. 2, f. 6a, b 

 (Oct., 1868). 



A glance at the figure of the young Dolabella rumphii will be 

 sufficient to explain the difference between the two species, and to 

 show that the small shells from Guayaquil are not the young of D. 

 rumphii. (Sowb.*) 



Spurious and doubtful species of Dolabella. 



Dolabella fragilis Lam., An. s. Vert., vi, (2d pt.), p. 42(1822),. 

 figured by Delessert, Recueil, pi. 25, f. 9a-c, is the shell of Tethys 

 depilans. 



Leuconyx tyleriana Ad., Ann. Mag. N. H. (3), xi, p. 18, supposed 

 to be allied to Dolabella, is the detached process (myophore) of 

 P ho las costata. 



Dolabella rondeletii Cuvier, Regne Anim. (first edition, 1817), ii, 

 p. 398, founded on Rondelet's Libri de Piscibus Marinis, p. 520, 

 woodcut, is Tethys leporina Linn. 



Dolabella sp. Two figures given in M. E. Gray's Figs. Moll. 

 Anim., iii, pi. 270, copied from sketches made by Templeton in 

 Ceylon, probably represent (1) D. ecaudata, and (2) D. scapula. 



Dolabella lepus Risso, Hist. Nat. Eur. Me"rid., p. 44, is Tethys lep- 

 orina f 



Dolabella Icevis Blainv. = Tethys depilans Linne. 

 Dolabella dolabrifera Cuv. = Dolabrifera dolabrifera Cuvier. 



