1922] NATURAL SCIENCES OF PHILADELPHIA 67 



Fig. 25 — Oligyra (Alcadia) palliata. Centrals and tips of 1st, 3rd, and 15th 

 marginals (x5). Comb-lateral and accessory plate separated 

 (x3). 



Plate VI. S'oasloma, Eutrochal Ha, and Calybium. Radulae. 



Fig. 26 — Stoastoma pisum. Centrals, and 1st and 11th marginals, and tip 

 of 18th; comb-lateral and accessory plate separated (x5). 



Fig. 27 — Eutrochatclla (Troschelviana) erythraea. Centrals, and tips of 1st. 

 5th, and 17th marginals; T-lateral and accessory plate separa- 

 ted (x5). 



Fig. 28 — Eutrochatclla (Pyrgodomus) rupestris. Centrals; T-lateral and 

 accessory plate separated (x5). For marginals, see fig. 27. 



Fig. 29 — Calybium (Geotrochakila) mouhoti. Centrals and tips of 1st, 5th, 

 11th and 12th marginals; T-lateral and accessory plate (below) 

 separated (x3). 



Fig. 30 — Eutrochatclla (PriotrochateUa) stellata. Centrals and tips of 1st, 5th, 

 10th, 40th and 50th marginals; T-lateral and accessory plate 

 united (x3). 



Fig. 31 — Eutrochatella pulchella. Centrals (x3). See 30 for marginals. 



Fig. 32 — Eutrochatclla pulchella. T-lateral and accessory plate united (xl+). 



Fig. 33 — Eutrochatclla (Cubaviana) politula. T-lateral and accessory plate 

 united (x3). 



Plate VII. Viana and Helicina. 



Fig. 34 — Viana regina. Centrals, capituliform complex and separated acces- 

 sory plate (xl+). 



Fig. 35 — Viana regina. Centrals, and tips of 1st, 10th, 16th, 26th, and 

 30th marginals (x3). 



Fig. 36 — Viana regina subunguiculata. Anterior view of T-lateral, to show 

 outline of reflected portion (xj^). 



Fig. 37 — Helicina ads per sa (small form mar morula) . Centrals, 2nd marginal 

 and edge of 4th marginal (x5). 



