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: callussmall, narrower, tumid, not. 
continued upon the margins; epidermis pale gray. (Sowbd.) 
Guayaquil (Brit. Mus. ): 
D. guayaquilensis Petit, SowERBY, Conch. Icon., xvi, pl. 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, pl. 25, f. 9a-c, is the shell of Tethys 
depilans. 
Leuconyx tyleriana Ad., Aun. Mag. N. H. (3), xi, p. 18, supposed 
to be allied to Dolabella, is the detached process (myophore) of 
Pholas 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, pl. 270, copied from sketches made by Templeton in 
Ceylon, probably represent (1) D. ecaudata, and (2) D. scapula. 
Dolabella lepus Risso, Hist. Nat. Eur. Mérid., p. 44, is Tethys lep- 
orina ? 
Dolabella levis Blainv. = Tethys depilans Linné. 
Dolabella dolabrifera Cuv. = Dolabrifera dolabrifera Cuvier. 
