PLATE I 
(All measurements are actual dimensions of specimens photographed) 
Fig. 1. Nassarius mendicus cooperi (Forbes); Santa Rosa Island, California. Calif. Acad. Sci. Loc. 23681. Length: 
15 mm. Max. diameter: 7.9 mm. 
Fig. 2. Nassarius fossatus (Gould); Long Beach, California. Calif. Acad. Sci. Loc. 29429. Length: 37.9 mm. 
Max. diameter: 22.5 mm. 
Fig. 3. Nassarius mendicus (Gould); 20 to 30 fathoms in Monterey Bay, California. Calif. Acad. Sci. Loc. 
24147. Length: 14.6 mm. Max. diameter: 6.8 mm. 
Fig. 4. Nassarius tegula tiarula (Kiener); Puerto Escondido, Gulf of California. Calif. Acad. Sci. Loc. 23805. 
Length: 13.0 mm. Max. diameter: 7.3 mm. 
Fig. 5. Nassarius versicolor (C. B. Adams); 12 to 15 fathoms in Port Parker, Costa Rica. Calif. Acad. Sci. Loc. 
17924. Length: 13.8 mm. Max. diameter: 7.9 mm. 
Fig. 6. Nassarius corpulentus (C. B. Adams); Margarita Island, Lower California. Calif. Acad. Sci. Loc. 701 
(H. Hemphill Coll.). Length: 19.2 mm. Max. diameter: 13.5 mm. 
Fig. 7. Nassarius pagodus (Reeve); near Mazatlan, Mexico. Calif. Acad. Sci. Loc. 27581. Length: 27.3 mm. 
Max. diameter: 17.3 mm. 
Fig. 8. Nassarius catallus (Dali); 35 to 40 fathoms in the Gulf of Chiriqui, Panama. Calif. Acad. Sci. Loc. 
17986. Length: 20.8 mm. Max. diameter: 12.5 mm. 
West Coast Nassariidae — DemonD 
