1918] Packard: Molluscan Fauna from San Francisco Bay 281 
SoLENACEA 
SOLENIDAE 
Solen Linnaeus 
Solen sicarius Gould 
Plate 26, figure 1; plate 50 
Solen sicarius Gould (1849d), p. 214; Carpenter (1863), p. 638; Arnold, R. 
(1903), p. 172. 
Description—The following is Arnold’s (1903) description of this species: 
‘Shell of medium size, elongated, transversely oblong, cylindrical, slightly 
faleate; beaks terminal; anterior extremity truncate obliquely at angle of about 
30 degrees, somewhat everted, the portion posterior to a line across from the 
beak to the base, concave; posterior extremity rounded; dorsal edge rectilinear; 
ventral edge regularly arcuate; surface undulated by lines of growth; hinge 
with single, erect, recurved, triangular tooth in each valve.’’ 
Length, 18 to 73 mm. 
Occurrence.—At stations D 5705 (1), D 5339 (1), D 5740 (2, 1), 
D 5743 (1), D5744 (9, 1), D5745 (4, 4), D5746 (f.), D5754 (2), 
D 5788 (4), D5791* (1), D 5798 (f.), D 5799 (1), D 5825 (1), D 5828 
A (1), and questionably at D 5764. 
This razor clam was reported by Carpenter (1863) from San Fran- 
cisco. It was taken by the ‘‘Albatross’’ only in the waters of the 
open ocean and the middle division of the bay. Living specimens 
were dredged within the Golden Gate in 514 to 18 fathoms, being 
more commonly obtained at less than 10 fathoms. These forms lived 
on bottoms comprised of muddy sand. Shells were encountered at a 
depth of 68 fathoms near the Farallon Islands. Since this bivalve 
burrows deeply in the sand and would rarely be captured in the trawl, 
it is probably much more widely distributed than is indicated above. 
Range-——Vaneouver Island to San Quentin, Lower California 
(Oreutt). 
Siliqua Mergerle 
Siliqua nuttalli (Conrad) 
Plate 26, figures 2a and 2b 
Solecurtus nuttalli Conrad (1837), p. 232, pl. 17, fig. 9. 
Machoera patula Carpenter (1863), p. 638 (in part). 
Siliqua patula Carpenter, Wood and Raymond (1891), p. 55. 
Siliqua patula var. nuttalli, Arnold, R. (1903), p. 173. 
Description —This species was originally described by Conrad (1837) as 
follows: f 
‘<Shell oblong-oval, thin, fragile, compressed; posterior margin more ob- 
tusely rounded than the anterior; color white, obscurely rayed; epidermis horn 
