no. 1823. MOLLUSKS OF THE GENUS CERITHIOPSIS— BART8CH. 367 



Plate 39. 



Fig. 1. Cerithiopsis (Ccrithiopsina) necropolitana; type; 7.7 mm.; p. 345. 



2. Cerithiopsis (Cerithiopsidella) alcima; type; 7.2 mm.; p. 350. 



3. Cerithiopsis (subgenus?) arnoldi; type; 5.4 mm.; p. 357. 



4. Cerithiopsis (Cerithiopsis) gala pagensis; type; 2.4 mm.; p. 340. 



5. Cerithiopsis (Cerithiopsis) cesta; cotype; 5.8 mm.; p. 341. 



6. Cerithiopsis (subgenus?) williamsoni; type; 2.5 mm.; p. 360. 



7. Cerithiopsis (subgenus?) stephensse; type; 9 mm.; p. 362. 



8. Cerithiopsis (Cerithiopsis) berryi; type; 3.4 mm.; p. 339. 



Plate 40. 



Fig. 1. Cerithiopsis (Cerithiopsis) aurea; type; 7 mm.; p. 344. 



2. Cerithiopsis (subgenus?) truncata; type; 3.1 mm.; p. 361. 



3. Cerithiopsis (Cerithiopsis) stejnegeri; type; 5.5 mm.; p. 342. 



4. Cerithiopsis (Ccrithiopsida) diegensis; type; 4 mm.; p. 347. 



5. Cerithiopsis (Cerithiopsis) neglecta; type; 3.2 mm.; p. 343. 



6. Cerithiopsis (Cerithiojisida) roivelli; type; 4.5 mm.; p. 348. 



7. Cerithiopsis (Cerithiopsis) stejnegeri dina; type; 7 mm.; p. 343. 



8. Cerithiopsis (Cerithiopsis) halia; type; 4.5 mm.; p. 344. 



9. Cerithiopsis (Cerithiopsidella) antefilosa; 6.9 mm.; p. 349. 



Plate 41. 



Fig. 1. Cerithiopsis (Cerithiopsina) adarnsi; type; 2.1 mm.; p. 346. 



2. Cerithiopsis (subgenus?) peruviana; type; 7 mm.; p. 365. 



3. Cerithiopsis (subgenus?) tumida; type; 4.2 mm.; p. 364. 



4. Cerithiopsis (subgenus?) ingens; type; 12.5 mm.; p. 363. 



5. Cerithiopsis (subgenus?) montereyensis; type; 3.2 mm.; p. 363. 



6. Cerithiopsis (subgenus?) destrugesi; type; 6 mm.; p. 365. 



