heard splashing about in little pools like a fish in an effort to escape. 

 While the "swimming" is probably too much a matter of chance to 

 amount to a migration, it serves in connection ^\^th the tides to dis- 

 tribute them over a variety of bottoms, and the scallop is found in 

 sheltered waters wherever the current is not too swift. 



To collect them, therefore, it is only necessary to wade about in 

 sliaHow water at low tide and pick them up. They may also be taken 

 witli a dredge in shallow water, where abundant enough; this is the 

 conunercial method in use on the Atlantic coast. 



Use — Usually only the big adductor muscle is eaten, the darker 

 colored mantle being avoided, but this is a useless waste and all parts 

 will l)e found edible, as in the oyster. It is generally agreed by 

 epicures that the scallop is the finest flavored and most tender of all 

 shellfish. The entire animal does not ship w^ell on account of the 

 poor closure of the shell, and as a result the "meats," as the adductor 

 muscles are called, are usually shelled out on the grounds and shipped 

 to market. ( 



Distribution — Monterey, California to Payta, Peru (Dall). Living 

 specimens were obtained in consideral)le numbers at Anaheim Creek, 

 Newport Bay and False Bay. At Anaheim a launch was employed 

 in dragging for* them with a small oyster dredge and the "meats" were 

 being shipped to Los Angeles. Farther north, though present, it is not 

 abundant enough to be used. 



ROCK SCALLOP 



Hinnites giganteiis Gray 

 Plate 1, figure 3; plate 2, figures 1 and 2 



Other name — Rock pecten. 



Description — This scallop is nuich larger than the preceding 

 one, reaching a diameter of as much as six inches. In its younger 

 stages it is free and symmetrical as are its smaller relatives, which it 

 then resembles in general appearance, but it later becomes attached 

 by its right valve to a rock or other support, and in its subsequent 

 growth is irregular, being distorted by its surroundings. The shells 

 may always be recognized by a deep purple color on the inside about 

 the hinge. 



Habitat and habits — In the young unattached stage its habits are 

 similar to those of the other species. The adult is reported by Thomp- 

 son (1913) as living in great numbers below tide line on the outer 

 coasts of British Columbia in somewhat sheltered parts. It has been 

 observed in corresponding positions on the rocky coast of Monterey 

 Bay but never in great numbers. A curious habit reminiscent of its 

 earlier swimming stage is retained by the attached adult. If disturbed 

 it often shoots out a jet of water to a distance of several feet apparently 

 by the same method of clapping together the valves used in swimming 

 (W. F. T.). 



Use — Not used as far as known in the region visited. 



Distribution — Aleutian Islands to Magdalena Bav, Lower Cali- 

 fornia (Dall). 



