XVI AURIS. 



Zaplagius group of Drymseus, will depend upon the soft anatomy ; 

 but I think likely that an examination of the jaw and teeth will show 

 the latter location to be near the truth. 



A. signata Spix, x, 107. Province of Bahia, Brazil. 



Ann's vittato Spix. 



Subgenus EUDOLICHOTIS Pilsbry, 1896. 

 Man. Conch., x, pp. 98, 108. Type A. distorta. 



The mantle of A. distorta has a very small anterior and two 

 larger, widely separated left lobes. The kidney is even shorter than 

 the pericardium. The genital system (pi. 50, fig. 7, after Semper) 

 is simple, the long penis prolonged beyond the insertion of the vas 

 deferens, with terminal retractor ; duct of the spermatheca long. 



The jaw of A. distorta has 35 plaits, the edges of which are hardly 

 free ; 5 or G median plaits converge and are coalescent, only the 

 outer reaching the lower margin (Semper). That of A. aurissciuri 

 (pi. 50, fig. 11, after Pace) is similar but with less converging and 

 with fewer plaits. It is like the jaw of Bulimulus. The radula of 

 A. distorta has 100-108 teeth in the slightly V-shaped rows. The 

 median tooth has a long lanceolate cusp ; first lateral tooth is similar 

 with a small ectocone, the rest having more rounded cusps and larger 

 ectocones (pi. 50, fig. 14, a central with 1st, 2d, 17th and 25th teeth, 

 after Semper). 



A. distorta Brug., x, 109. A. glabra Gmel. 



var. sublaevis Pils., x. 111. Pelek. undulatus Bk. 



var. gracilis Pils., x, 111. Bui. aegotis Mke. 



var. guairensis Jouss., x, 111. var. grenadensis Gp., x, 114. 



var. bisuturalis Pils., x, 112. A. lacerta Pfr., x, 115. 



A. aurissciuri Gp., x, 112. A. sinuata Alb., x, 1 16. 



B. aegotis Pfr. A. euryomphala Jon., x, 116. 

 A. glabra Gm., x, 113. B. otostomus Pfr. 



Valuta auris Judse Meusch., A. perdix Pfr., x, 118. 



xiv, 133. A. dillwyniana Pfr., x, 118. 



H. auris-caprinus Fer. A. midas Alb., x, 119. 



P. caprinus Bk. var. spectrum Alb., x, 119. 



Pupa auris sileni Gray. A. hauxwelli Crosse, x, 120. 



Auricula sileni Lam. 



