from ALL PARTS of THE WORLD 



51 



1. Hinnites giganteus. Gray. The Pur- 

 ple-hinge Scallop. California coast. These 

 strange shells of irregular shape are al- 

 ways a puzzle. The first years growth is 

 like a small Pinna or Fan Shell, when 

 they start to assume the form of a scallop 

 and make quite a job of it. There are only 

 three known species and this is the larg- 

 est, attaining 3 to 4". They have a red- 

 dish-purple spot on the inside near the 

 hinge. 1.00 



2. Saxidomus nuttalli. Con. Nuttalls 

 Saxidome. Southern California coast. It 

 is covered with rough concentric rings, 

 white and 2 to 3". 50c 



3. Chama pellucida, Sow. Agate 

 Chama. San Pedro. One of the finest of 

 the West Coast forms and will compare 

 favorably with any known species. They 

 are always firmly fastened to a rock and 

 often grow in clusters. Of a pearly white, 

 occasionally rose-red shadings. 



to 2" 50c 



4. Mytilimeria nuttalli, Con-Nuttall's 

 Sea bottle. California coast. A curious 

 form of shell only found in the clumps of 

 Sea Anemones which are often found 

 under large rocks. There are many forms 

 of sea shells that live happily with other 

 lower invertebrates. 1" 75c 



5. Pholos in Rock. Illustration shows 

 how many forms of thin slender shells 

 will thoroughly perforate hard rock, as a 

 protection. How they excavate their bur- 

 row has been studied for generations. 

 Some forms live deep in their burrows 

 and others protrude slightly. 



6. Barnea pacifica, Stearns. Pacific Pid- 

 dock. California coast. All the Piddocks 

 of the world being tender shells must live 

 in a burrow of wood or rock as shown in 

 illustration. Some species are quite small 

 but this form attains 2 Vz". 1.00 



7. Modiolus rectus. Con. The Straight 

 Horse-mussel. California coast. A smooth 

 brownish shell attaining 3 to 4" and often 

 adorned with numerous hairs which en- 

 ables it to attach to other shells of the 

 same species forming a family cluster. 



50c 



8. Botula falcata, Gould. Hooked Pea- 

 pod Shell. Southern California. A borer 

 which has no trouble in perforating the 

 hardest rock, making an even round hole, 

 protecting its very thin shell. It also spins 

 a brissus to more thoroughly attach itself 



to its rocky home. It has a dark chestnut 

 periostracum, covered with transverse 

 wrinkles. 2 l /2" 50c 



9. Pododesma macrochisma, Desh. 

 Pearly Monia, Puget Sound. One of the 

 large species of the world, of the genus 

 Anomia. There are only six species of its 

 class, one being in far off China. At- 

 tains 3". 50c 



10. Ostrea lurida. Carp. The Lurid 

 Oyster. California coast. Of a dull color 

 like most of the Oyster tribe, is rather 

 small and stubby but like many other 

 species assumes various shapes, some of 

 which have been named. Some of the 

 varieties have reddish shell. 2" 25c 



11. Pholadidea parva. Try on. The Lit- 

 tle Piddock. California coast. It is a very 

 small species, no larger than cut and often 

 much smaller. Usually found burrowing 

 in back of Haliotis shells. If they burrow 

 too deep, the Haliotis will try to protect 

 itself by forming bulbous blotches of 

 nacre and thus prolong its life. 75c 



12. Macoma inquinata. Desh. Polluted 

 Macoma. Puget Sound. This genus of 

 shells in western hemisphere are mostly 

 white and rather thin. These are about 

 75 species in the world and some attain 

 rather large size. 1 to 3" 50c 



13-14. Terebratalia occidentalis. Ball. 

 The Western Lamp Shell. Southern Cali- 

 fornia. One of the great Brachiapod 

 shells which are of world-wide distribu- 

 tion and range through various genera. 

 Most of the thousand of species are fossil 

 in the rocks, only a few now living in the 

 oceans. The two illustrations show both 

 outside and inside of shell. 1V4" 50c 



15. Tagelus subteres. Con. Subcircular 

 Razor Clam. California coast. A shell 

 with violet rays and dark periostracum 

 that burrows in the sand. There are a 

 number of species on both coasts. 



2V2" 30c 



16. Lithophaga plumula. Hanley. Rock- 

 eating Mussel. California coast. It has a 

 small cylindrical brownish shell, with 

 which it burrows in the rock or other 

 handy substances. 1 to 2" 50c 



17. Glottidea albida. Hinds. White- 

 tongue Shell. Monterey to Lower Cali- 

 fornia. A fine little grayish brachiapod 

 of about 1V4". They burrow in the mud, 

 the tip of each shell just below the sur- 

 face. 50c 



(Descriptions of 18 to 22 at bottom of Plate 23) 



