EULOTA. 203 



bifid outer-cusps (pi. 65, fig. 3, similaris ; pi. 65, fig. 6, duplocinda ; 

 pi. 65, fig. 1, ravida). 



Genitalia (pi. 66, fig. 18, E. frutieum) : penis short, swollen, pass- 

 ing into a long epiphallus which receives vas deferens and retractor,, 

 but lacks flagellum. Dart sack globose, containing a round, conical 

 dart (pi. 66, fig. 19), and communicating at base with an empty 

 accessory sack which bears the mucus glands ; these consist of 2-4 

 oval glands, closely bound together, and flattened on their adjacent 

 sides, their ducts uniting into one canal which opens into the acces- 

 sory sack. Duct of spermatheca long, inserted high on vagina. 

 (See also pi. 66, fig. 20, E. similaris; figs. 21,22, 23, E. ravida; fig. 

 24; E.fodiens). 



Distribution, middle Europe to China and the East Indies. 



Eulota is here used for a considerable number of Oriental snails 

 having essentially the organization of the European E. frulicum.. 

 The penis lacks flagellum ; the dart sack generally bears an accessory 

 empty sack into which the many- or few-lobed mucus gland empties ; 

 and the dart is round in section or but little flattened, the shell 

 being rather globose with conoidal, though low, spire. Eulotella 

 Mouss., a sectional name used by von Martens for E. similaris, offers 

 no distinctive characters of much value, except the obsolesence of 

 the accessory sack on the dart sack. Acusta differs only in the 

 thinner shell with simple lip, the mucus glands being either as in E. 

 similaris (tourannenis) or being more closely bound together into 

 one compact mass which envelops accessory sack and part of the 

 dart sack (E. ravida, pi. 66, fig. 21 ; also fig. 22, reverse view of d. s. 

 with mucus gland, and fig. 23, mucus gland turned back from d. s., 

 showing its insertion on accessory sack). The jaw of Acusta (pi. 65, 

 fig. 2, ravida) has 8 strong close ribs. The radula (pi. 65, fig. 1, 

 ravida) is not unlike other Eulotas, but the ectocones of marginal 

 teeth are not split. Should the Oriental species be held sectionally 

 distinct from the European E. fruticum on account of their more 

 elongated and muiti-sacculate mucus glands, they may be separated 

 under the names Ac-usta and Eulotella; but v. Mollendorff, certainly 

 a high authority on Asiatic snails, does not think two names required 

 for them, uniting the three groups in Eulota. 



One species of this group, E. similaris, has an unusually wide 

 geographic range, extending from middle and southern China to 

 Penang, Java, Celebes, etc., in which regions it is apparently indi- 

 genous. By the unconscious intervention of commerce it has be- 



