40 THE NAUTILUS. 
was 110,000 bushels, valued at $4,400, while the catch in 1889, up 
to and including the 19th of June, was 75,000 bushels, valued at 
$3,000.” 
The marvellous abundance in certain localities of the various spe- 
cies above named, is, aside from the economic value of the fishery, 
of exceeding interest to the naturalist. What proportion of the 
total quantity, 315,000 bushels of jingles and quarter-decks, belong 
to the latter species, Crepidula, is not stated; probably much less 
than half, and quite likely not more than a quarter; presumably 
the quarter-decks are attached to, or are adherent upon, the jingle 
or Anomia shells, domiciliares upon the valves of the latter species, 
the same as the West American species. 
Crepidula rugosa is a domiciliare on the shells of Pecten equisul- 
catus Cpr., the Californian analogue of P. irradians. It is not at 
all infrequent to find from three to six individuals of the West 
Coast Crepidula on a single specimen of the Pecten. 
Beside the use of oyster, clam, scallop, quarter-deck and jingle 
shells for forming spawning-beds, the oystermen in some instances 
and in some places, are utilizing old tin cans as catchment objects 
for the spat to fasten upon. What with the packing of adult oysters 
at the canneries and the entrapping of the innocent unsophisticated 
fry on old tin pots and cans, the situation may be said to look to an 
old man in a balloon, or a young man “up a tall tree,” lke can- 
ning the oysters at both ends. 
Los Angeles, Cal., June, 1897. 
NEW UNIOS. 
BY BERLIN H. WRIGHT. 
Unio Pinei sp. nov. 
Shell wide or oblong, moderately and uniformly thin, dorsal and 
ventral margins usually parallel, subtruncate or obliquely rounded 
before, biangular and truncated behind. Epidermis reddish-brown ; 
olive above, polished and thickly covered with unequal rays. Beaks 
scarely elevated above the dorsum, and surrounded by four or five 
fine concentric, undulating ridges. Ligament thin, reddish, long 
and depressed. Greatest diameter in the centre of the shell. Beak 
cavities slight. Cavity of the valvesample and tray-shaped. Nacre 
