THE NAUTILUS. 79 



earlier than Agriolimax, but as their authors did not mention 

 truly generic characters, the name in common use was allowed 

 to stand, though evidently with misgivings. It may be men- 

 tioned that Morch also had little idea of the true generic char- 

 acters of Agriolimax. 



The names preceding Agriolimax are as follows: 



LIMACELLA Brard, Hist, des Coquilles, env. Paris, 1815, p. 

 107, for Limacella parma, unguiculus, obliqua, concava. Limacella 

 obliqua ( Limax agrestis L. ) here selected as type. Not Lima' 

 cella Blainville, 1817. 



DEROCERAS Rafinesque, Annals of Nature, 1820, p. 10; Binney 

 and Tryon's reprint, p. 65. For Limax gracilis Raf. 1 



KRYNICKIA Kaleniczenko, Bull. Soc. Imp. Nat. Moscou, 1839, 

 p. 30, for K. melanocephala Kalen. A nude name. 



KRYNICKILLUS Kalen., Bull. Soc. Imp. Nat. Moscou, XXIV, 

 1851, p. 220, for K. melanocephalus* minutus, cristatus, maculatus, 

 eichwaldii, dymezeviczii, all new species. 



The type of Krynickia and Krynickillus Kalen. and Megaspis 

 Krynicki, is K. melanocephalus Kalen. 



Krynickia melanocephala was published as a bare name in 1839, 

 but cited as a synonym of Krynickillus melanocephahts in 1851, 

 together with Megaspis melanocephalus. Krynickillus therefore 

 takes precedence if any use is found for the name. 



MALINO Gray, Catalogue of Pulmonata, Brit. Mus., Pt. I, 

 1855, p. 178, for Limax lombricoidss Morelet. 



MEQAPELTA Morch, Journ. de Conchyl., 1857, p. 282, for 

 Limax (Megapelta) semitectus Morch. (Described from a draw- 



'"Z/t'max gracilis. Body slender, head and lower tentacula fulvous, neck 

 grey, upper tentacula brownish, mantle dark fulvous, back smooth brown, be- 

 neath dirty white; tail brown, obtuse above, mucronate and acute beneath. 

 Probably a real Limax, yet it has the two long tentacula inserted above the 

 neck, while the small ones are terminal, and all slightly club shaped. It may 

 perhaps form a sub-genus Deroceras. Length over one inch. Found near 

 Hendersonville in Kentucky, and in woods." 



There can be very little doubt that this is Limax campestris Binn. 



1 With the synonyms Krynickia melanocephala Kalen. , 1839, and Megatpis 

 melanocephala Krynicki, unpublished. 



See Agriolimax melanocephalus Simroth, Die Nachtschnecken fauna des 

 Bussischen Beiches, 1901, p. 154. 



