PLATE 25 
Fig. 1. Macoma balthica (Linnaeus). X 1. Longitude 21.6 mm. 
Station D5717.* Exterior of right valve. 
Fig. 2. Macoma balthica (Linnaeus). X 1. Longitude 28 mm. 
Station D 5717.* 
Fig. 3a. Tellina salmonea (Carpenter). X 1. Longitude 13 mm. 
Station D 5800. Exterior of right valve. 
Fig. 3b. Lellina salmonea (Carpenter). X 1. Longitude 13 mm. 
Station D 5800. Exterior of left valve. 
Fig. 4. Macoma indentata Carpenter. X 1. Longitude 25 mm. 
Station D 5791. Exterior of right valve. 
Fig. 5. Tellina bodegensis Hinds. X 1. Longitude 47.5 mm. 
Bolinas. Exterior of left valve. 
Fig. 6. Macoma yoldiformis Carpenter. X 2. Longitude 15 
mm. Station D5785.* Exterior of left valve. 
Fig. 7a. Tellina buttoni Dall. X 2. Longitude 16 mm. Station 
D.5739.* Exterior of right valve. 
Fig. 7b. Tellina buttoni Dall. X 2. Longitude 15 mm. Station 
D 5739.* Interior of right valve. 
Fig. 8. Macoma secta (Conrad). X 1. Longitude 59 mm. Bo- 
linas. Exterior of left valve. 
Fig. 9. Macoma balthica (Linnaeus). X 1. Longitude 20 mm. 
Near Key Route Pier, Oakland. Exterior left valve. 
Fig. 10a. Tellina carpenteri Dall. X 4. Longitude 12mm. Sta- 
tion D5788.* Interior of left valve. 
Fig. 10b. Tellina carpenteri Dall. X 4. Longitude 12mm. Sta- 
tion D5788*. Exterior of left valve. 
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