DOLABELLA. 303 
DOLABELLA Lamarck, 1801. 
Dolabella LAMARcK, Systéme anim. sans vertébres, 1801, p. 62. 
Aplysia (in part) Rane, Hist. nat. aplysiens, 1828, p. 36. 
Dolabella Piuspry, Tryon’s Manual conch., 1896, 16, p. 150. 
General body-form conic, wide and obliquely truncate behind, narrower 
in front. Integument more or less warty. Head bearing in front a pair of 
subeylindrical buccal tentacles, slit above; rhinophores much nearer the ante- 
rior margin than to the dorsal slit, similar to those of Tethys. Eyes minute, 
in front of the rhinophores; posterior area of the body defined by an obliquely 
transverse ridge. Parapodial lobes united save for a dorsal slit, more open at 
the ends, the anterior insertions of the lobes contiguous, parted only by the 
spermatic groove. Mantle not nearly covering the ctenidium, produced in a 
folded siphon behind. Branchial cavity very large. Genital orifice usually 
under the posterior portion of the ctenidium, penis very long, near right buccal 
tentacle. Hypobranchial gland multiple. 
Shell solid and calcareous, hatchet shaped, loosely coiled, the free spire 
obliquely decurved, heavily calloused; sinus deep and concave; margins reflexed. 
Type:— Dolabella scapula (Martyn, 1786). 
The earliest record of this form is found in D’Amboinsche Rariteitkamer 
and in the Thesaurus imaginum Piscium Testaceorum, of Georg Eberhard 
Rumpf, printed in Amsterdam, the first named in 1705, and the second in 1711, 
the same plates being used in each. Figure 5 of Plate 10 represents the animal 
designated as “‘limax marina tertia,” while fig. 12 of Plate 40 reproduces the 
shell, which is termed “‘tertia species operculi callorum.” That the shell so 
figured belonged to the animal shown on Plate 10, was not positively known 
until the dissections made by Cuvier (1804) of specimens collected by Péron 
at Mauritius, confirmed the statement of the latter as to the identity of the 
two forms. The same shell was figured by Martyn in the Universal concholo- 
gist in 1786, Plate 99, with the binomial name Patella scapula. In 1801 Lamarck 
established the new genus Dolabella for the shell figured by Rumph, with the 
name Dolabella callosa, which is of course antedated by the publication of Martyn, 
the genotype being now recognized as Dolabella scapula (Martyn). 
Our anatomical knowledge of the genus is mainly drawn from the brief 
descriptions of Cuvier (1804), the monograph of Rang (1828), and the more 
recent works of Amaudrut (1886), Mazzarelli and Zuccardi (1890), Gilchrist 
(1894), Lacaze-Duthiers (1898), Eliot (1899), and Bergh (1905, 1907); all of 
which are more or less fragmentary. 
