177 



2582 Vertigo Coloradoensis Arizonensis 



2583 Heliodiscus parallelus 



2584 Pupilla muscorum 



2585 Pupilla Blandi 



2586 Pupilla syngenes dextroversa 



2587 Pupoides marginatus 



2588 Pupoides hordaceus 



2589 Bifidaria pellucida hordeacella 







2590 Cockerell, T. D. A.: 



Snails of New Mexico and Arizona. Nautilus 19:67-71. 

 In part a review of the next paper. 

 o 



2591 Pilsbry, H. A.: 



Mollusca of the southwestern states. Phila. acad pr (Mr 

 1905. 



Among the species are numbers 2592-2598, and others. 



2592 Ashmunella Levettei 



2593 Ashmunella Chiricahuana 



2594 Ashmunella metamorphosa 



2595 Ashmunella Ferrissi 



2596 Ashmunella angulata 



2597 Ashmunella fissidens 



2598 Ashmunella duplicidens 



2599 Genus Acanthina 



Under this are now placed the species of Monoceros. 



2600 Adeomelon Stearnsii Dall. 



2601 ^Esopus myrmecoon Dall. 



2602 Alabina California Dall & Bartsch. 



2603 Alabina cerithoidea Dall. 



2604 Alabina tenuisculpta Cpr. 



2605 Variety diegensis Bartsch. 



2606 Genus Amalthea 



Synonymy: — Hipponyx of former lists. 



2607 Amicula pallasii Midd. 



Shell nearly concealed by the hairy mantle, which is almost 

 circular, and which covers the back of the animal except for 8 

 small holes; this mantle or girdle bears unequal bunches of red- 

 dish hairs; length 67 mm. Northern waters. The "Concealed 

 Chiton." 



2608 Ampullina purpurea Dall. 



Point Barrow, Alaska, etc. Shell about 2 inches long, purp- 

 lish, with patches of white enamel near aperture; periostracum 

 olive with darker streaks. 



2609 Ancylus (Lanx) alt its 

 Synonym of A. patelloides Lea. 



2610 Ancylus Newberry i 

 Synonym of A. patelloides Lea. 



2611 Anisodoris nobilis 

 Montereina nobilis MacFarland. 



2612 Area reticulata Gmel. 



San Pedro, Cal., southward, as also the next. 



2613 Area mutabilis Sby. 



2614 Archidoris Montereyensis (See 266). 



2615 Asthenotherus villosior Cpr. 



2616 Astrea undosa 



Better known as Pomaulax undosus. 



