ox MOLLTJSCA OP THE WEST COAST uF NORTH AMERICA. 615 



eppries, and that the roinparatively few links that are mct-with in larije 

 eerit's of two forms should not be allowed to unite them, but be considered 

 as hybrids." 



Lvnatia Lewidi. Abundant on beach. [One pp. measures 5| in., and the 

 animal of a much similler one (4 in. J is 11 inches lon^/.l 



Ostrea. " The sjiiue species throufrhout to S. Franc. : !S. Die<;o," Cuo]ier. [Be- 

 sides the typical uortlurn shell, O. luridn, are well-mai-ked l-vars. lalicumataf 

 ruf Olden, and e.tj)atisa.] 



There are also several species which are quoted in Dr. Cooper's letters, or 

 appear from his .'^ketches to be quite di.stinct, or at lea^t new to the fauna : 

 but they have not yet been sent for id( ntification. Among these the following 

 are the most important. The MS. numbers refer to the tracings which Dr. 

 (.'ooi)er kindly cojiied from his orifrinal drawings. Where a " — " appears, 

 the information is derived from his letters only. 



MS. No. 



402. Allied to ? TJinicia. 



— Cjiathotlonia, probably plicatn, Desh. (Cape St. Lucas, ^nnfus). 



G20fl. FifjTure accords exactly with Voiiin foremna, GId. Catalina Is., beach. 

 lO.'jS. Figm-e accords with Liocoiicha hieroi/lyphica. Catalina Is., 120 fin. 

 IfXiO. Iteseiubles Siinnptii. Catalina Is., 40 fin. 



(>7<i. Resembles CnigsaeUa Pucifica. 



874. Lm-ina. 



98.>. Xiwu/a, with concentric sculpture. Sta. Barbara, lo fm. 



— Yoldia. One fresh valve ot a large and remarkable species, 2 '6 by 1-2 in., 



with fine concentric sculpture, very inequilateral. Sta. Cruz ; on beach. 

 7olrt. ?I(iiit/iitut. 

 1077,1078. Chitonidip. Two highly sculptured species. Sta. Barbara, 12 fm. 



— ?G(iditii'a. Cat. Is., CoofKr ; Farallone, Is., liouell. "The animal did'ers in 



haviuir pectinated flattened tentacles. It may be the t^-pe of a new genu3 



Hoiccl/ia.'' 

 400. E7nar<jinula. [The first appearance of the genus on the W. American coast.] 

 41")rt. Gb/phk. 



3">4rt. Like Haplocochleas. Sta. Barbara, 15 fm. 

 504. Like lyn/ola. 40 fm. 



— Triria suiif/iiineff. Dredged dead in Cat. Is. 



— Trivia. " Thinner and lai'ger than «rt«^j/<rtea. Common in Lower Cal." [?s> 



Paci/tca.l 



— " Terchra iii)eciUata." One sp. near S. Pedro. 



— Pkiir<>t(>niid(e. Several species ai-e represented only by single specimenji. 



Among them are 



588. Dri/lin. 

 1021. Dril/ia, 2 in. long, shaped like Mitra. One worn sp. Catalina Is., 120 isa, 

 102(1 Drillia, reversed. Catalina Is., 00 fm., living. 



470rt. Clathurvlhi ( large). Sta.. Bai-b., 20 fin. 



6(«. ClathureUa, 15 fin., Sta. Bai-b. 

 18o2. ?anthurella,iOiin. 

 105.3. ?Daphn<'lla, CO fin. 



419, 42f>. Two species of shells resembling Daphnella. 

 10.J5. ?£ela, 80 fm. 



42''a. Man(/eh'a, 15 fm., Sta. Barb. 



PtdTb. Shape of Cithara, without ribs. Catalina Is., beach. 

 1028. "?Aclis," reversed. One sp., Cat. Is., 120 fm. [The figure more resembles 

 a young Vermetid.] 



403. "Cancel/aria ?Tritoni(P, Shy. Agrees with Dr. Newcomb's specimen." S. 



Diego, one dead on beach, 2 J in. long. 

 817. C'inoelUtria. Fragment of a second sp'icies ec^ually large. 

 10;%. Siyareftis. 40 fm., dead, Cat. Is. 

 10.")0. Lnfnel/aiia. 10 fm., Sta. Barbara. 

 (385a. 404, 818.) Xaticidce. 3 sp. 



101 



