8 



10c; pomilio 10c; pyramidata 5c; saint- 

 simonis 15c; squalida 10c; striata 5c; 

 traskii 10c; virgata 10c. 



Pisidium abditum, adamsi, aequilaterale, 

 casertanum, compressum, corneum, 

 fallax, fontinalis, fossovinum, idaho- 

 ensis, novaboracense, obtusale, occi- 

 dentale, peraltum, politum, roperi, 

 splendidulum, sulcatum, virginicum, 

 each 10c. 



Placenta orbicularis 15c. 



Planorbis albus 5c; armigera 5c; bicar- 

 inatus 5c; binneyi 10c; campanuiatus 

 5c; carinatus 10c; complanatus 5c; 

 complicatus 10c; corneus 5c; contortus 

 10c; corpulentus 5c; dilatatus 10c; 

 dreryi 10c; dubius 10c; exacutus 5c; 

 fieldi 15c; interclaria 10c; lentus 5c; 

 lucidus 10c; marginatus 10c; marmor- 

 atus 10c; nautileus 5c; nitida 5c; op- 

 ercularis 10c; parvus 5c; planorbis 5c; 

 pronus 10c; scalaria 15c; spirorbis 5c; 

 tenuis 10c; trivolvis 5c; turnidus 15c; 

 vermicularis 10c; vortex 5c. 



Pomatius carthusianus, gracilis, macula- 

 tus, monteserraticus, partulum, tes- 

 sellatus, each 10c. 



Praticolella berlandieriana 10c; griseola 

 10c. 



Pteroceros aurantia 50c; chiragra 50c; 

 lambis $1; rugosa $1. 



Punctum pasadenae 10c. 



Pupa acanthinula, anglica, aragondca, 

 avena, avenacea, cinerea, corticaria, 

 cylindracea, decora, dertosensis dolio- 

 lum, fallax, ferrari, frumentum et var. 

 elongata, groecum, goniostoma, ilei- 

 densis, leptochilus; microdon, modica, 

 monteserratica, muscorum, pediculus, 

 pygmaea, quadrasi, quadridentata, 

 quinquedent&ta, secale, semproni, sterk- 

 iana tarraconensis, umbilicata, varia- 

 bilis, each 10c. 



Pupoides marginatus 10c. 



Pyramidula alternata 5c; cronkhitei 10c; 

 perspectiva 5c; striatella 5c. 



Pythia pantherina 25c. 



Ranella californica 25c; lampas $1. 



Rapana bezoar 50c. 



Rissoa costata, labrosa, parva. quadrasi, 

 similis, striata, sulcata, each 5c. 



Sanguinolaria nuttalli 25c. 



Siphonaria alternata, atra, lecanium, 

 maura, sipho, each 10c. 



Siphonalia kelletti $1. 



Solen californicus 50c; rosaceus 10c. 



Somatogyrus integer 5c; isogona 5c. 



Rphaerium aureum, corneum, dentatum, 

 fabalis, flavum, lacustris, rhomboi- 

 fleum, rivicola, rosaceum, occidentale, 

 ovale, partumeum, securis, simile, 

 solidulum, stamineum, striatinum, 

 subtransversum, sulcatum, truncatum, 

 each 10c. 



Stenogyra beckiana, gracilis, javanicum, 

 mauritianum, octona, paayensis, swift- 

 iana, each 10c. 



Strombus bituberculatus 25c; costatus 

 75c; gigas $1 ; gracilior 25c; granulatus 

 15c: Isabella 25c; pugilis 25c. 



Succinea avara, brevis, campestris, con- 

 coidalis, elegans, garrettiana, gros- 

 venori, haydeni, horridana, luteola, 

 obliqua, ovalis, oregonensis, putris, 

 retusa, rusticana, sillimani, tlalpan- 

 ensis, undulata et var. morchi, ver- 

 meta, virgata, each 10c. 



Tegula ater, aureotincta, brunnea, 

 funebrale et var, superbatum, gallina, 

 globulus, each 10c. 



Tellina carpenteri 20c. 



o 



BOOKS RECEIVED 



Perry, Horace: Theories of energy. 231 

 pp. $1.75. G. P. Putnam's Sons, pub- 

 lishers, 2 West 45th St., N. Y. 



Jeffrey, Edward Charles: Anatomy of 

 woody plants, $4. University of Chi- 

 cago Press, Chicago, 111. 478 pp. 306 ill. 



o • 



MAGDALEETA BAY SHELLS 

 In 1917 the editor spent the month of 



March on the shores of Magdalena bay, 



Baja California, and collected about 400 



species of shells, of which the following 



were obtained in sufficient numbers to 



offer for sale, or in exchange for other 



shells, books, etc. 



Acmaea atrata Cpr. 20 c. 



Actaeon traskii Stearns. 25c. 



Alaba jeannettae Bartsch. 15c. 



Aletes squamigerus Cpr. 25c. 



Angulus suffusus Dall. 20c. 



Anomia peruviana Orb. 10c. Red var., 

 valves 10c. 



Area gigantea Brod. Juniors, 10c. 



Area solida Brod. Sby. 15c. 



Arcularia tiarula Kiener. 15c. 



Cardium procerum Sby. 25c. 



Cerithium gemmatum Hinds. 10c. 



Chama pellucida Brod. 25c. 



Conus fergusoni Sby. $1. 



Crepidula excavata Brod. 15c. 



Crepidula nummaria Gould. 25c. 



Discinisca strigata Brod. 15c. 



Donax lamarckii Desh. 15c. 



Engina ferruginosa Reeve. 10c. 



Epitonium tinctum Cpr. 25c. 



Eulithidium typicum Dall. 10c. 



Fasciolaria princeps Sby. Poor, 50c. 



Fissurella rubropicta Pils. 15c. 



Fissurella rugosa Sby. 15c. 



Haliotis fulgens Phil. 25c to $1.00. 



Laevicardium elenense Sby. 20c. 



Lithophaga attenuata Desh. 35c. 



Litorina aspersa Phil. 15c. 



Litorina conspersa Phil. 15c. 



Litorina varia Sby. 20c. 



Lyonsia nesiotes Dall. 25c. 



Macrocallista squalidus Sby. 20c. 



Marginella californica parallela Dall. 20c. 



Marginella politula Cooper. 25c. 



Modiolus brasiliensis Lam. 25c. 



Nerita ornata Sby. 25c. 



Oliva incrassata Soland. 25c. 



Olivella porteri Dall. 35c. 



Olivella tehuelca Duclos. 15c. 



Ostrea fisheri Dall. 50c. 



Pecten circularis Sby. 25c. 



Pedalion chemnitzianum Orb. 15c. 



Phyllonotus radix Gmelin. 25c. to $1. 



Pteria peruviana Reeve. 25c. 



Purpura nuttalli Conr. 10c. 



Pyramidella adamsi Cpr. 35c. 



Siphonaria maura Sby. 15c. 



Strigilla fucata Gould. 25c. 



Tivela delesserti Desh. 15c. 



Tivela planulata Sby. 20c. 



Tritonalia poulsonii Cpr. 20c. 



Vasum cestus Brod. Fossil, $1. 



Williamia galapagana Dall. 25c. 

 C. R. ORCUTT, 



1705 Broadway. San Diego, C'al. 



