234 



NILS HJ. ODHNER 



Fam. Limacidae. 



Limax arborum Bouchard-Chantereaux. — Masatierra, Colonial Valley, 

 3 sps., max. 1. 37 mm (^Vt 1917), and 4 sps., max. 1. 20 ('/12 1916). Masafuera, 

 beneath a stone, many sps., max. 1. 33 mm (^^/a 1917). The species is new to 

 the Juan Fernandez Islands. 



Agriolimax agrestis Linne. — Masatierra ('/12 1916), 2 sps., max. 1. 20, 

 and Colonial Valley (^V? 1917), many sps., max. 1. 29,5; about 300 m above 

 sea level, 2 sps., 1. 19,5 (*/8 191 7); the Portezuelo quebrada, a few sps., 1. 29,5 

 (^"/t 1917). — Masafuera, 1000 m above sea level, in ferns (Va 1917), i sp., 

 1. 9,5 mm. Though widely distributed by commerce throughout the world, A. 

 agrestis has not until the present been recorded from the Juan Fernandez Islands. 



Fig. 14. Teeth from the radula of 



Tornatellina bilamellata Anton. 



X 750. 



Fig. 15. Genital organs of Torna- 

 tellina bilamellata. Marking as 

 in fig. 1 1 ; pr prostata gland. 



Milax gagates Draparnaud. — Masatierra, 

 Colonial Valley, many sps., max. 1. 43,5 mm (^^/t 

 1917). Masafuera, about 1000 m above sea level, 

 among ferns, 2 sps., 1. 12 mm (Va 1917)- Recorded 

 by E. A. Smith (1884) from Juan Fernandez. 



Fam. Tornatellinidae. 



A family Tornatellinidae was constituted by 

 PiLSBRY in 1 910, the characters of which were 

 given in his Manual of 191 5 (Vol. 23) and chiefly 

 based on an anatomical examination of the Hawaiian 

 genus Auriculella, as well as on the presence of a 

 parietal lamella in the aperture of the shell. The 

 examination of the Easter Island Pacificella varia- 

 bilis as well as the typical form of the genus Torna- 

 tellina from the Juan Fernandez has, however, made 

 evident that their anatomical characters are wholly 

 different from those given by Pilsbry as signi- 

 ficant of the fam. Tornatellinidae. According to 

 the rules of the zoological nomenclature, the family 

 must be named after its type genus, and thus the 

 name Tornatellinidae must be retained, but restricted 

 to comprise, at first hand, the Juan Fernandez 

 forms, and thus its diagnosis must be respectively 

 altered. The Hawaiian genera Auriculella and allies 

 should certainly be comprised into a family of its 

 own, Auriculellidae. 



The definition of the fam. Tornatellinidae thus 

 reconstructed (and previously including also the 



