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 tliis branch of conchology. For an 
extended synonomy the reader is referred to his excellent "Report to the British Association, 
1857." 
NaCELLA INSTABILIS, ACMiEA PELTA, A. PERSONA, A, SPECTRUM, A. SCABRA, A. ^RUGINOSA, 
SCURRIA MITRA. 
Family CHITONIDiE. 
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 from 
the coast of Oregon: 
Chiton muscosus, C, submarmoreus, C. tunicatus, C. lignosus. 
Family HELICID Jl. 
HELIX FIDELIS. 
Ildix fiddis, Gray, in Proceed. Zool. Soc. 1834, Carp, p 314. 
Helix NuttalUana, Lea, in Pliilos. Trans. 1833, pL XXIll, f. 74. 
Ilah. — W^asliington 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 habitually. 
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. 
Uelix Toicnsendiana, Lea, in Trans. Pliilos. Soc. pi. XXIII, f. 80. — Cabp. Rep. p. 314. 
Hah. — 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. 
Hdix Columbiana, Lea, in Trans. Philos. Soc. pi. XXIII, f. 75. — Carp. Report, p. 314. 
Hdix lahiosa, Gould, U. S. Expl. Exped. Moll, and Shells. 
Hab. — Washington Territory, Dr. Cooper. 
