20 



Bryant Walker 

 Subgenus GUNDLACHIA s. s. 



Apex smooth. 



^ -^ 



Fig- 59 



Fig. 60 



Type : Gnndlachia ancyliformis Pfr. 



Example : Gnndlachia hinklcyi IWalk., fig. 59. Radula, fig. 60. 



Snbgemis KINCAIDELLA Hannibal, 191 2. 

 Apex radially striate. 

 Type: Ancyliis fragilis Try. = G. calif oruica Row. 

 Example : G. incckiana Stimp., fig. 61. Radula, fig. 62. 



Fig. 61 Fig. 62 



Subfamily RHODACAIEIN.E Walker, 19 17. 



Shell patelliform, conical, elevated or depressed, apex tinged with pink. 

 Animal having the jaw composed of numerous segmented plates. Radula 

 with a long, slender central, unicuspid or faintly bicuspid, and with the base 

 widely expanded in some species ; the first lateral very large, with an 

 enormous mesocone, the blade-like cusp extending beyond the base, the 

 ectocone is back of the mesocone, entirely separated from it and has several 

 small cusps; there is no endocone ; the next four laterals are similar in 

 shape, but diminish rapidly in size towards the margin ; these are succeeded 

 by two or three transition teeth, smaller and with more or less imperfect 

 cusps. The marginals are very small, rapidly decreasing in size towards the 

 outer edge, with large quadrate bases wider than high, vestigial, the cusps 

 being nearly, if not quite obsolete. 



