BRACHYPODELLA. 41 



truncate, the last whorl either free or adnate, the base gener- 

 ally angular. Aperture oblong, round or squarish, the lip 

 expanded or reflexed, generally continuous. Axis solid, and 

 either simple or variously modified. 



Jaw thin, arcuate and plaited, 'as in Urocoptis. Radula 

 very long and very narrow, the central tooth with a narrow 

 basal-plate and small cusp, two adjacent laterals on each side 

 enormously enlarged, with very broad, rounded mesocones, 

 the ectocones small or obsolete; marginal teeth few and nar- 

 row, each with a small bilobed cusp (plates 9 and 10). 



Type B. antiperversa. Distribution, Antilles except west- 

 ern Cuba and the Bahamas; mainland from Trinidad and 

 Venezuela to the isthmus of Tehauntepec. Most of the species 

 live on the ground under stones, etc. 



Soft Anatomy of BrachypodeUa. 



The genitalia (pi. 14, fig. 3, B. chemnitziana; fig. 6, B. 

 agnesiana) are similar to typical Urocoptis in general struc- 

 ture. In both species examined the penis is moderately de- 

 veloped, with the vas deferens and retractor muscle apical. 

 The vagina is at least as long as the penis. The spermatheca 

 (fig. 3, sp.) is subglobular, on a very long and slender duct 

 (fig. 3, sp. d.). The uterus (fig. 3, ut.) in the viviparous B. 

 chemnitziana is capacious ; in the individuals opened contained 

 tAvo or three young shells in various stages of development. 

 The vas deferens, as usual in viviparous land snails, is free 

 from the uterus nearly to the upper end of the latter. 



The free retractor muscles (pi. 14, fig. 3, B. chemnitziana) 

 unite into a common band at the columellar insertion. This 

 shortly divides into the columellar muscle proper (col.) and 

 a wide band which divides into three : the right ocular retrac- 

 tor (r. o.), which also gives off some minor branches to the 

 foot; the pharyngeal retractor, split distally; and the left 

 ocular (1. o.), which is inserted on the vas deferens and the 

 vagina, as well as the eye-stalk. The retractor muscle of the 

 penis has its insertion on the lung floor. 



The central nervous system (pi. 14, fig. 1, B. agnesiana) is 

 less concentrated than Fischer found it to be in Eucalodium 



