376 ZOOLOGY. 



Family PATELLID.E. 



Very few shells of this family were collected. Among the imperfect specimens, of which 

 they mostly consist, we can recognize, with some doubt, the following species, adopting the 

 nomenclature of Mr. Carpenter, the best authority upon this branch of conchology. For au 

 extended synonomy the reader is referred to his excellent "Report to the British Association, 

 1857." 



Nacella instabilis, Acm^a pelta, a. persona, a. spectrum, a. scabra, a. ^buginosa, 

 scurria mitra. 



Family CHITONIDJl. 



We find in the collections sent home still fewer materials, either specimens or notes, relating 

 to this family than to the previous one. The following were identified, and are chiefly fi'om 

 the coast of Oregon: 



Chiton muscosus, C. submaemoreds, C. tdnicatus, C. lignosus. 



Family HELICIDJ;. 



HELIX PIDELIS. 



Ildix fiddis, Gray, in Proceed. Zool. Soc. 1834, Carp, p 3U. 

 Helix NuUalUana, Lea, in Pliilos. Trans. 1838, pi. XXIII, f. 74. 

 Ilah — Washington Territory, Dr. Cooper. 



' ' This beautiful species is apparently limited to the forests west of the Cascade mountains, 

 where it is common under evergreens in the drier situations. I have found one sticking to a 

 small tree about three feet from the ground, but do not know of its ascending trees habituallj-. 

 Its eggs, white, pellucid, and as large as a duck shot, are deposited in April under rotten wood. 

 Young specimens are very rare. I found this shell throughout the valleys from Vancouver to 

 the Straits of De Fuca, and more rarely near the coast, where it is smaller in size." — J. G. C- 



HELIX TOWNSENDIANA. 



Helix Tou-nsendiana, Lea, in Trans. Pliilos. Soc. pi. XXIII, f. 80. — Cabp. Eep. p. 314. 

 Hub. — Washington Territory, Dr. Cooper. 



"This is the most abundant species, especially along the coast, where, unlike most of our 

 American forest snails, it frequents open prairies among the fern. It is particularly abundant 

 on low, sandy bars just above high tide, which are covered with a deep, rich deposit of shell 

 marl, and have been formerly favorite camping grounds of the Indians. These places, being 

 very productive, are much cultivated by the whites; and immense numbers of this animal's 

 shells are found when the grass and bushes are first burnt off. They continue to live in potato 

 fields in the same places. The bare face of Cape Disappointment fronting the ocean is also a 

 locality. I did not find this species about Puget Sound." — J. G. C. 



HELIX COLUMBIANA. 



Ildix columhmna, Lea, in Trans. Pliilos. Soc. pi. XXIII, f. 75. — Caki". Keport, p. 314. 

 Iklii lahivsa, GouLD, U. S. Expl. Exped. Moll, and Shells. 

 Jlab. — Washington Territory, Dr. Cooper. 



