56 
Natural History 
M. cilinta , var. Wosnpssenslzii Midd. 79, 36, 13. 
Vic., (G.W.T., C.F.N.) Salt Spring I., Clayoquot Sd., Dep. Bay, Comox, 
(tc., (C.F.N.) St. of Georgia, Goletas Channel, Q.Ch.Sd., Quatsino Sd., and 
Q.C.I., (G.M.D.) 
* M. imporcata Cpr. 13, 21, 36. 
Vic., (G.W.T., C.F.N.) Ganges Harbour and Comox, (C.F.N.) John- 
stone St., (G.M.J).) “ High angled, with the back edge of each valve ser- 
rated, head valve with very strong ribs.” [H.A.P.] 10 to 25 fms. 
* These have been examined by Mr. H. A. Pilsbry, of the Academy of Natural Science, Philadelphia. 
* M. sinuata Cpr. 13, 21, 36. 
Vic., (G.W.T., C.F.N.) “ High angled, back edge of valves not serrated, 
head valves with strong ribs. Surface reticulated by two sets of curved 
riblets. [H.A.P.] 
Family CRYPTOCHITONIDH3 
Genus Cryptochiton Midd. and Gray 
* C. Steileri Midd. 78. 36. 
Whole coast to Q.C.I. At and near low water 
Genus Katherina Gray 
* K. tunicata Wood. 107, 36. 
Whole coast to Q.C.I., (G.M.D.) Between tide marks. A favorite deli- 
cacy with the Indians, and occasionally to be seen in the market. 
Family LEPTOCHITONID^l 
Genus Leptochiton Gray 
* Tj. cancellatus Sby. 95, 36. 
Vic., (G.W.T., C.F.N.) Dep. Bay, and Clayoquot Sd., (C.F.N.) Q.Ch.Sd. 
(G.M.D.) Under stones at low water and dredged in 20 fms. 
Family ISCHNOCHITONIDyE 
Genus Trachydermon Cpr. 
T denttens Gld. 62, 36. 
Vic., (G.W.T., C.F.N.) Clayoquot Sd., (CF.N.) In tide pools. 
* T flectens Cpr. 13, 21, 36. 
Vic. and Dep. Bay, (G.W.T.) Small, rose coloured. Dredged in 10 fms. 
and upwards. 
Genus Tonicella Cpr. 
4 T. lineata Wood. 107, 36. 
Whole coast to Q.C.I., (G.M.D.) In tide pools, 
