1919.] NATURAL SCIENCES OF PHILADELPHIA. 159 



LiMAX GAGATEs (Drap.) Risso (55). This is the true gagates of 

 Draparnaad, the type of the genus Milax Gray. 



LiMAX VARiEGATUS (Drap.) Ris^ (56). Bourguignat considers 

 this slug as merely a variety of Limax maximus Linne, or L. cinereus 

 (pars) Miiller. The L. maximus of Linnaeus is identical with the 

 above mentioned L. cellarius. 



Limax marginatus (Drap.) Risso (56). Bourguignat regards this 

 as the L. marginatus of ^Nliiller (1774) and Draparnaud. The Limax 

 martinianus Bourg. (1869) is certainly one of the numerous varieties 

 of L. ynarginatus. 



Limax agrestis (L.) Risso (56). This is recognized by Bour- 

 guignat as correctly determined. The Limax niciensis and men- 

 lonicus mentioned by NevilP from the Maritime Alps are mere 

 varieties of L. agrestis, which in Liguria as in Tuscany varies much 

 in coloration and pattern. 



Limax carinatus Risso (56). The brief description given by 

 Risso has been completed by Bourguignat. The species is common 

 i n Ligm-ia. It should not be confused with Limax carinatus (Leach, 

 1820), Turton, 1831, renamed by Ferussac L. sowerhyi, the validity 

 of Leach's publication being doubtful, though the name was current 

 among authors 1820-23. There is also a Limax carinatus of Orbigny, 

 1839, which has been renamed polyptychus by Bourguignat, 1859. 



This species should be included under the genus Milax Gray 

 (better known as A7nalia Moquin Tandon) as pointed out by Bour- 

 guignat, 1854, and B. B. Woodward, 1903. The anatomical differ- 

 ences from Limax have been exposed by Sordelli in his Anatomy 

 of Limax etruscus Issel.* 



Limax lineolatus Risso (57). I have not discovered this species 

 in the district. The original specimen is decayed beyond recog- 

 nition. • 



Oris ferussaci Risso (57). A marine slug of the family Onchidi- 

 idae according to Bourguignat. Risso describes its habitat as in 

 moderate depth of water on muddy bottom. Not later recognized. 



Testacellus bisulcatus Risso (58). Mortillet united this spe- 

 cies with T. haliotidea Draparnaud, but since the latter does not 



3 Landshells of the Neighborhood of Mentone, Proc. Zool. Soc. London for 1880, 

 p. 103. 



* BuU. Mai. Ital. 1872, p. 5. 



