OF CONCHOLOGY. 47 



arsi in the grove ; but the surf is so heavy on the beach that only 

 the thick Lucina Californica withstands it unbroken. 



Aug. 29th. Made about twelve casts in from seven to twenty 

 fathoms west of town, and obtained only five additions, though 

 with many living or better specimens of others before collected. 



Aug. 30th to Sept. 5th. The tides running lowest this week I 

 collected chiefly along shore, finding thirty-three additional spe- 

 cies, chiefly dead. 



Sept. 6th. To try a new ground I sailed three miles N. N.W. 

 of town toward middle of bay, finding a depth of thirty-five to 

 forty fathoms muddy sand, but obtained only the Coecum, a young 

 living 3Iacha'ra patida and four other species found at low water. 



Sept. 9th. Made five casts in three to ten fathoms near town, 

 adding only two to the list. 



Sept. 10th. Tried again in from five to twenty fathoms, add- 

 ing three species. Considered the chance of finding more in 

 that direction too small to pay expenses. 



Sept. 11th. Dredged along the east or weather beach, though 

 my boatman thought it dangerous on account of the heavy surf. 

 Found the sandstone reef a mile N. E. of town from which the 

 beach fragments are broken off", and in two out of six casts in 

 seven to eight fathoms, obtained pieces of rock with five ad- 

 ditional species living on them, and eight others living, before 

 found dead. 



Sept. 12th. Packed up everything, intending to take the 

 steamer, which was daily expected, for a more southern locality. 

 It passed Monterey however without stopping, and I was obliged 

 to wait for its next trip down the coast. During the following 

 week I collected only on shore, adding fifteen species. 



Sept. 20th. With a hand-net I dredged up three large speci- 

 mens, living, 0^ Lunatia Leivisii, which I could see crawling on the 

 sand in about twelve feet of water. Also over one hundred of 

 Olivella biplicata, which burrows in the sand in colonies about ex- 

 treme low water. * 



Sept. 21st. Dredged in ten to twenty fathoms off Quarry 

 Point, and near the Whalers' tryworks, without finding anything 

 new. 



Sept. 23d. Found four more species in the cavities made by 

 borers in the clay-rock, making in all nine borers and five nestlers. 



Sept. 24th. Dredged in afternoon for two miles on sandstone 

 reef, visited on 11th, making seven casts, but only an occasional 

 fragment could be broken oft", from which I obtained about twenty 

 species, mostly living and good, but none new. Tried again in 

 thirty-five fathoms a mile N. E. of Quarry Point, getting nothing. 



Sept. 25th. Searched beach for the last time as far as Point 



