154 AMERICAN JOURNAL 



This species is not uncommon under stones and on decaying 

 timber, Javali, Chontales. 



8, Krynickia Americana, Tate. Plate 16, fig. 1. • 



Animal slender, pointed behind, back convex, granulated ; 

 mantle "lib inch in length, free as far as the respiratory orifice, 

 brownish-black and smooth ; color of' body grey, with black in 

 the grooves, giving the general appearance of a brownish- 

 black ; head and tentacles of a lighter color ; edge of foot Avith 

 defined crenulated border ; foot grey, and divided into three 

 bands. Jaw horse-shoe shaped, with a median projection ; it is 

 analogous to that, less the posterior plate, of Succinea put^'is. 

 Lingual dentition consists of straight rows of about fifty plates ; 

 the median plate obscurely tricuspid ; the laterals bearing two 

 subulate or symmetrical cusps. Shell represented by a thin 

 semi-opaque membrane. 



Inhabits under stones and about houses, Javali, Chontales, 

 where it is not uncommon. This slug is very active, moving 

 about at night, and can suspend itself by its mucus. 



Though this animal resembles Limax agrestis and L. campes- 

 ti'is, and so much the latter as to give rise to doubt as to their 

 specific distinctness, yet the character of the mantle, which de- 

 termines its position in the old-world genus Krynickia, alone 

 distinguishes my species. 



GUPPYA, Tate. 



Stenopus, Guilding (name preoccupied). 

 Conulus, Guppy (1868), non Moquin-Tandon. 

 Examples. — Helix GundlacM, Pfr. ; Conulus vacans, Guppy. 



Ayiimal related to that of Zonites ; foot truncated, furnished 

 with a mucus pore and retractile appendage ; median part of 

 foot defined. " Lingual dentition in Gi. vacans 30 • 5 • • 5 • 30 ; 

 teeth broad, subequal, first five laterals symmetrical, with a 

 large rounded cusp having a smaller cusp of similar shape on 

 each side ; outer laterals bicuspid, resembling the teeth of 

 Testacellus" — Guppy. Shell small, trochiform, subperforate, 

 thin, shining, finely and longitudinally striated, lip acute. 



Morch, misreading the author's description of the lingual den- 

 tition of Conulus vacans, Guppy, writes that it " doit former un 

 genre ^ part, le genre Guppya ; les dents ressemble7it a celles 

 des TestaceUa," whereas the laterals only resemble those of that 

 genus. However, I have adopted Morch's name with much 

 pleasure in compliment to my friend, — a most accurate and zeal- 



