194 TREGELLES: MARINE MOLLUSCA OF CORNWALL. 
Williams Hockin, ‘Cornish Marine Shells”: Journ. R. Institu- 
tion of Cornwall, 1866. 
IE. D. Marquand, “Land and Freshwater Mollusca of West 
Cornwall,” 1883: Trans. Penzance N.H. and Antiq. Soc., 
new series, vol. 1., p. 403. 
G. F. Tregelles, “Marine Testaceous Mollusca of Cornwall,” 
1885 ; of. ctt., new series, vol. i1., p. 43. 
Rey, R. W. J; Smart, MeAs and Rev. Ay i Cooke svGee 
‘Marine Shells of Scilly”: Journ. of Conch. 1885, 1886. 
C. Burkill and J. T. Marshall, “Marine Shells of Scilly”: of. at, 
1889, 1891. 
W. Heape, M.A., “Prelim. Report on Fauna and Flora of Ply- 
mouth Sound”: Journ. M. Biological Assoc., 1888. 
W. Garstang, M.A., “Opisthobranchiate Mollusca found at 
Plymouth”: of. cZ., 1890. 
Private collections have been kindly placed at my disposal 
by Miss Hockin of Hayle, the late Miss H. Tyacke of Penzance, 
Mr. W. E. Baily of Paul, and the late Rev. R. N. Dennis, B.A., 
of Penzance. I have also had access to the public collections 
in the Penzance Museum (which now includes Miss H. Tyacke’s 
collection), and the Truro Museum (including that of the late 
Rev. W. Rogers, M.A.). It gives me pleasure to acknowledge 
and recall kind personal assistance from the late Mr. Clifford 
Burkill, Mr. E. D. Marquand, Mr. J. T. Marshall, the Rev. 
R. W. J. Smart, M.A., Mr. R. V. Tellam, and many others. 
The following is an index to the initials used in my list:— 
Messrs. Alder & Hancock A.&H. | Mr. Williams Hockin ... W.H. 
Mr. Clifford Burkill noo Colt. Dr. J. Gwynvjetixeys) 1. eee Cole 
Mine PeaGocksm ewe cack: Mr. J. T. Marshall Peels bolt 
Mr. Jonathan Couch... ‘J.C. Rey. W. Rogers son eWEMING 
Rey. R. N. Dennis R.N.D. | Rev. R. W. J. Smart  R.W.J.S. 
Messrs. Forbes & Hanley IF. & H. Miss H. Tyacke ... ... Miss T. 
Mr. Walter Garstang W.G. | Mr. Rupert Vallentin ... R.V. 
Miss Hockin ... ..._ ... Miss H. PN oVe Ye ada, ones Mence ona) (Gols We 
Journal of the Marine Biological Association ....... J.M.B.A. 
JEG viii., April 1896, 
