^\y. T. D. A. Cockerell's .Vo/m on S/iirjs. 381 



with altogctljcr fictitious riigie on the back. Forussac's figure 

 is alter one of tho.se in Journ. de Phys., and is fairly recog- 

 nizable. 



Altogetlier I think it must be held that Blainville described 

 and figured his genus Limnril/a sntllciently for recognition, 

 and as it antedates P/u'/oinj/cns Ijy three years, the name must 

 be used. JjiinncrNu, Brard, 1815, need not he considered, as 

 it is identical with Linia.v, Linne, 1707. U'he synonymy of 

 Limace^Ja, Bl., will accordingly stand : — 



LniACELLA, Blainville. 



1817. LimaoeUa, Rlainville, "Mt5in. sur qiii>lq. Moll. Piilin." Journ. de 



Phys. Dec. 1S17, p. 44:5 (text), and Nov. 1817, fig.s. 4, ',. 

 18i*0. Pliilomijcus, liatinesque, Ann. of Xat. p. 10. 



1820. Eumi'lus, Rafinesque, Ann. of Nat. p. 10. 



1824. ^f('t//^i)nafiu^n, v. Ilass. Bull. Univ. Sci. iii. p. 82. 

 1842. I/icilaria, Bens. Ann. & -Mag. Nat. Hist. ix. p. 48G. 



1842. Tebennopliofus, Biuney, Bost. Journ. Nat. Hist. iv. p. 171. 

 1804. PalUfcra, Morse, Journ. Portl. Soc. i. 8, fig. 5, pi. iii. fig. 6. 



It does not .seem necessary to recognize more than one genus 

 here, thougli v. Ihering (Nachr. d. in. Ges. 1889) recognizes 

 three — Philonii/cuft, PalUfera, and Meghimatium. Pallifera 

 may be conveniently retained as a subgenus. 



The species of Limacella are as follows : — 



LimaceUa lactiformis, Blainv. 



1817. LimaceUfi lactiformis:, Blainv. Journ. de Phys. Dec. p. 444. 



1821. LimaceUiis hicfescens, Ft^russac, Hist. Nat. Moll. pi. vii. fig. 1. 



1825, Limacella elfortiana, Blainv. Man. de Mai. et de Conch, p. 4G4. 



This appears to be distinct from any species since recog- 

 nized. The British Museum types may be briefly described 

 as follows: — 42 raillim. long; respiratory orifice 7 raillim. 

 from anterior border of mantle. Sole, lat. 7 millim. Entirely 

 greyish white ; mantle pellucid, semitransparent, finely 

 graimlose. 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 Philomyciis. 



Limacella carolinensis (Bosc). 



Limax carolinensis, F6r. Hist. 77, pi. vi. fig. 3. 



There are two specimens of this species in the British 

 Museum from Virginia [Dr. J. W//ma)i), agreeing excellently 



