381 
Mr. T. D. A. Cockerell’s Notes on Slugs. 
with altogether fictitious rugae on the back. Fdrussac’s figure 
is after one of those in Journ. de Phys., and is fairly recog- 
nizable. 
Altogether I think it must be held that Blainville described 
and figured his genus Limacella sufficiently for recognition, 
and as it antedates Pliilomycus by three years, the name must 
be used. Limacella , Brard, 1815, need not be considered, as 
it is identical with Limax , Linnd, 1767. The synonymy of 
Limacella , Bl., will accordingly stand: — 
Limacella, Blainville. 
1817. Limacella , Blainville, “ Mem. sur quelq. Moll. Pulm.” Journ. de 
Phys. Dec. 1817, p. 443 (text), and Nov. 1817, figs. 4, 5. 
1820. Pliilomycus i, Bafinesque, Ann. of Nat. p. 10. 
1820. Eumelus, Bafinesque, Ann. of Nat. p. 10. 
1824. Meghimatium , v. Hass. Bull. Univ. Sci. iii. p. 82. 
1842. Indiana , Bens. Ann. & Mag. Nat. Hist. ix. p. 486. 
1842. Tebennophorus , Binney, Bost. Journ. Nat. Hist. iv. p. 171. 
1864. Pallifera , Morse, Journ. Portl. Soc. i. 8, fig. 5, pi. iii. fig. 6. 
It does not seem necessary to recognize more than one genus 
here, though v. Ihering (Nachr. d. m. Ges. 1889) recognizes 
three — Pliilomycus , Pallifera , and Meghimatium. Pallifera 
may be conveniently retained as a subgenus. 
The species of Limacella are as follows : — 
Limacella lactiformis , Blainv. 
1817. Limacella lactiformis , Blainv. Journ. de Phys. Dec. p. 444. 
1821. Limacellus lactescens , Ferussac, Hist. Nat. Moll. pi. vii. fig. 1. 
1825. Limacella elfortiana , Blainv. Man. de Mai. et de Conch, p. 464. 
This appears to be distinct from any species since recog- 
nized. The British Museum types may be briefly described 
as follows: — 42 millim. long; respiratory orifice 7 millim. 
from anterior border of mantle. Sole, lat. 7 millim. Entirely 
greyish white ; mantle pellucid, semitransparent, finely 
granulose. Sole slightly ochreous, unicolorous. A distinct 
groove round the edge of the foot. Liver pale chocolate. 
Gray in 1855 (Cat. Pulm. p. 158) has referred this species 
to Philomycus. 
Limacella carolinensis (Bose). 
Limax carolinensis , Fer. Hist. 77, pi. vi. fig. 3. 
There are two specimens of this species in the British 
Museum from Virginia ( Dr.J . Wyman ) , agreeing excellently 
