[TAYLOR] MARINE MOLLUSCA 29 
MODIOLA, Lamarck. 
19, MoptoLta REcTA, Conrad. 
Journ. Acad. Nat. Sci. Phila., vol. vii., pt. 2, p. 243, pl. xix., fig. 1 (1837). 
Var — Mytilus (Modiola) flabellatus Gould, Proc. Bost. Soc. Nat. Hist. 
vol. iii., p. 343 (Dec., 1850); and U. S. Expl. Exped., Mollusca, p. 453, fig. 
561 and 561la (1852). > 
A fine, large species, attaining sometimes to a length of seven 
inches. It has not as yet been found commonly in our waters, but 
perhaps it only needs searching for, 
Dr. Newcombe has taken it in Ganges Harbour, Salt Spring Island, 
and at Clayoquot Sound. I have found it at Victoria, and have received 
specimens from the west coast of Vancouver Island. According to 
Carpenter, our local form of this species is the M. flabellata of Gould, 
which is broader than the typical M. recta of Conrad. 
20. MopbioLA MopIOLA, Linne, sp. 
Mytilus modiolus, Linne, Syst. Nat., ed. xii., vol. i., pt. 2, p. 1158, no. 256 (1767). 
Common everywhere. The deep water forms are much larger than 
the between tides varieties, attaining a length of five inches. Jeffreys 
(Brit. Conch., vol. ii., p. 113) records specimens, from the Northumber- 
land coast, measuring 94 inches in length and proportionately broad. 
ADULA, H. and A. Adams. 
21. ADULA STYLINA, Carpenter. 
Rept. Brit. Assoc., 1863, p. 644 (August, 1864); and Ann. Mag. Nat. Hist., 3rd series, 
vol. xiv., p. 425 (Dec., 1864). 
Found boring in soft rock between tides; near Victoria, Lord and 
Newcombe ; Sooke Harbour, Professor Macoun. 
MODIOLARIA, Beck. 
22, MODIOLARIA LÆVIGATA, Gray, sp. 
Modiola lwrigata, Gray, Suppl. to App. to Parry’s Second Voyage (1824). 
Not uncommon in 10 to 30 fathoms, Victoria and Nanaimo. Dr. 
Dawson found a living specimen associated with Saxicava rugosa, at low 

edulis, Modiola modiola, Modiolaria nigra, M. levigata, M. marmorata, Nucula 
tenuis, Yoldia limatula, Leda minuta, Venericardia borealis, Lucina borealis. 
Serripes Groenlandicus, S. Laperousii, Macoma nasuta, M. edentula, M. incon- 
spicua, Standella falcata, Mya truncata, Saxicava rugosa, Belaturricula, Admete 
Couthouyi, Buccinum Moerchianum, Chrysodomus fornicatus, C. liratus, Trophon 
multicostatus, T. orpheus, Purpura lima, Trichotropis cancellata, Mesalia reticu- 
lata, Natica clausa, Lunatia pallida, Acmea patina, Cryptobranchia concentrica, 
Margarita helicina, and Tonicella lineata. 
Further information as to the northern range of our shells is given in later 
papers by the same author, reference to which will be found below under,—Crypto- 
don sericatus, Macoma edentula, Penitella penita,and Tritoniwm Oregonense. 
