170 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 20 



PLATE 8 



Fig. 36. Amytjdalum pallidulum (Dall) 1916. South side of Santa 

 Cruz Island, California. Length: 10.6 mm. 



Fig. 37. .1 myddalum americanum n.sp. Holntype. Isla Gorgona, 

 Colombia. Length: 21 mm. 



Fig. 38. Lioherus salvaJoricus (Hertlein and Strong) 1946. Boca 

 de Culebra, Costa Rica. A juvenile specimen. Length: 

 3.8 mm. 



Fig. 39. Musculus oli-vaccus Dall 1916. 35 miles W of Depoe Bay, 

 Oregon. Length: 11 mm. 



Fig. 40. Gref/ariella chcnui (Recluz) 1842. Santa Catalina Island, 

 California. Length: 6.3 mm. 



Fig. 41. Dacrydiiim {Oucndreda) clc(/antidiiin n. sp. Holotype. 

 Bahia de Gardner, Isla Espanola (Hood Island), Gala- 

 pagos Islands. Length: 2.4 mm. 



Fig. 42. Cretiflla divaricata (Orbigny) 1853. Huntington Beach, 

 California. Hinge. 



Fig. 43. Crcnella decussata (Montagu) 1808. Sor-Varanger, Nor- 

 way. (Los Angeles County Museum) Hinge. 



Fig. 44. Crenella dwaricata (Orbigny) 1853. Huntington Beach, 

 California. Length: 3 mm. 



Fig. 45. Crenella decussata (Montagu) 1808. Sor-Varanger, Nor- 

 way. (Los Angeles County Museum) Length: 3.5 mm. 



Fig. 46. Solamen columhianum (Dall) 1897. Santa Catalina Island, 

 California. Length: 14.3 mm. 



