OF CONCHOLOGY. ^9 



— 418 3Iopalia acuta, Cpr. 



" Monterey " (Nuttall coll.) 

 Nuttall, disc. 

 1087 421 AcantJiopleura scahra, Rve. 



Str. Fuca to Santa Barbara. 

 Nine living, 1. w. Nuttall, disc. 



— 423 IscJmochiton Magdalensis, Hds. 



Monterey to San Diego — Lower Cal. 

 Smithsonian coll. 

 *1073'427 LepidopUurus pectinatus, Cpr. 

 Santa Cruz to Catalina I. 

 Santa Cruz, common. Extreme 1. w. 

 518 428 Lepidopleurus Mertensii, Midd. 

 Str. Fuca to Monterey. 

 2 living, 7 — 20 fms., rock. Smithsonian coll. 

 329 430 Trachydermon inter stinctus, Gld. 

 Puget's Sound to Monterey. 

 2 living, 1. w. ? 



— 435 Trachydermon Hartwegii, Cpr. 



San Francisco to Monterey. 

 Hartweg disc. 

 325 436 Tracliydermon Nuttallii, Cpr. 



Str. Fuca to Monterey. 

 1 living, 20 ft., rock. Nuttall disc. 



— 437 Trachydermon Jlectens, Cpr. 



Str. Fuca to San Diego. 

 Smithsonian coll. 

 420 — 



Chitonid indet. 

 Not rare, living, 1. w. 



857 441 Nacella instabilis, Gld. 



Str. Fuca to Monterey. 

 Rare, dead on bch. Sta. Cruz, bch., dead, lives on algae ? 



416 442 Nacella insessa, Hds. 



Baulines Bay to San Diego. 

 16 dead, bch. Lives imbedded in algae, 1. w. 



1237 445 Nacella paleacea, Gld. 



Santa Cruz to Santa Barbara. 

 Santa Cruz, living, common, on narrow grass, 1. w. 



*344 446 Nacella triangidaris, Cpr. 



Baulines Bay to Monterey. 

 4 dead, 20 — 30 fms. Probably lives on algae. 



