. West coast shells. A familiar description of the marine, fresh water, and land mollusks of United States, found west of the Rocky Mountains ... Fig. 160. Standella nasnta, Conr., na-su-ta. Very similarto the next species, of which it is perhaps only a vari-ety; shell somewhat depressed behind the inch or more in length. Standella plannlata, Conr., plan-u-la-ta, is shownin Fig. 161. Its shape is much likethat of the last, but it isonly half as long. Thebeaks are nearly equidis-tant from the ends of theshell, and the triangularhinge-tooth is in front offound in southern. Fig. 161. the
. West coast shells. A familiar description of the marine, fresh water, and land mollusks of United States, found west of the Rocky Mountains ... Fig. 160. Standella nasnta, Conr., na-su-ta. Very similarto the next species, of which it is perhaps only a vari-ety; shell somewhat depressed behind the inch or more in length. Standella plannlata, Conr., plan-u-la-ta, is shownin Fig. 161. Its shape is much likethat of the last, but it isonly half as long. Thebeaks are nearly equidis-tant from the ends of theshell, and the triangularhinge-tooth is in front offound in southern. Fig. 161. the ligament. Its color is white:waters. Standella falcata, Gld., fal-kaFig. 161, but smaller and natter,an inch long; northern. ta. Shaped likeGlossy; less than A HEAVY SHELL. 189 Pachydesma crassatelloides, Conr., Pak-i-dez-macras-sa-tel-loi-des, is the big, hard name which appliesto the big, hard shell, a small picture of which isshown in Fig. 162. The pair of valves from whichthe figure was drawn are five and a half inches inlength and weigh over a pound. They are very thickand solid, even to their edges, which are smooth andfinely rounded.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmollusks, bookyear188
