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 



Auris vittata 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 6 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 r 

 after Semper). 



A. distorta Brug., x, 109. 



var. sublaevis Pils., x, 111. 



var. gracilis Pils., x, 111. 



var. guairensis Jouss., x, 111. 



var. bisuturalis Pils., x, 112. 

 A. aurissciuri Gp., x, 112. 



B. aegotis Pfr. 

 A. glabra Gm., x, 113. 



Valuta auris Jud& Meusch., 

 xiv, 133. 



ff. auris-caprinus Fe*r. 



P. caprinus Bk. 



Pupa auris sileni Gray. 



Auricula sileni Lam. 



A. glabra Gmel. 



Pelek. undulatus Bk. 



Bui. aegotis Mke. 



var. grenadensis Gp., x, 114. 

 A. lacerta Pfr., x, 115. 

 A. sinuata Alb., x, 116. 

 A. euryomphala Jon., x, 116. 



B. otostomus Pfr. 

 A. perdix Pfr., x, 118. 

 A. dillwyniana Pfr., x, 118. 

 A. midas Alb., x, 119. 



var. spectrum Alb., x, 119. 

 A. hauxwelli Crosse, x, 120. 



