REl'ORT Oi' COMMlll'EE ON HKITlSH MARINE MOLLUSCA. 



The Committee have lo acknowledge the kind assistance of Llie following 

 gentlemen :— Messrs. L. St. G. Byne, W. H. Dall, J. T. Marshall, R. B. Newton, 

 E. A. Smith, R. Standen, E. R. Sykes, B. B. Woodward, and the Rev. Canon A. 

 M. Norman. These gentlemen must not, however, be held responsible for any of 

 the shortcomings of the list. 



The Committee have found the amount of agreement between different authorities 

 greater than had been anticipated, but there are still many questions on which the 

 discrepancies of opinion seem to be irreconcilable. 



The Committee do not imagine that the present list can be regarded as final, but 

 if they have succeeded in producing a document which will be a help to students of 

 conchology the object of their appointment will have been fulfilled. 



The following are the corrections to be made in the list already published, to- 

 gether with a few explanatory notes on questions regarding which differences of 

 opinion have arisen. 



The numbers refer to the species in the list ; genera are referred to by the nuni^ 

 her of the first species. The fact that the old Linnean genus Chiton is broken up 

 by writers of such eminence as Pilsbry and Simroth into several families is sufficient 

 to show that its divisions are at all events of generic value. 



25 The type of Nuculana Link is A^. 

 rostrata, a true Leda, and therefore 

 as this name precedes Leda of Schu- 

 macher it is entitled lo stand. 



59 Pristigloma Dall, because Gloimis 

 is preoccupied. 



61 For Modiolus Lamarck substitute 

 Volsella Scopoli, which has the 

 same type (^Mytilits viodiolns L. ), 

 and is prior in date of creation. 



65 This species was placed by its de- 

 scriber in Myn'na, Ixit as that name 

 is preoccupied the next available, 

 viz. Adiila H. & A. Adams, has 

 been adopted. 



76 Pennant's species is clearly figured 

 and unmistakeable, whereas it is ex- 

 tremely difficult, if not impossible, to 

 determine lo which of the Linnean 

 species the British form is lo be re- 

 ferred; hence it is not advisable to 

 use the term i-ndis. 



108 Tlie shell is called Cardiuiit hit- 

 iiianum in the tenth edition of 

 Linne. It was altered to Chavia cor 

 in the twelfth, but in accordance 

 with ihe principles mentioned above 

 the earlier name has been adopted. 



109 For Arctica Schumachi'r read Cy- 

 prina Lamank', the former name 

 being i)reoccupied for a Bird. 



114 For Cryptodon read Thyasira 

 Leach in Lamarck [see Dall, Proc. 

 U.S. Nat. Mils., vol. 23, p. 784, 

 1901) ; this genus includes nos. 114- 

 118, and 120. Add Leptaxinus 

 Verrill & Bush to include nos. 119 

 and 121. 



131 Lasaea Leach hi Broivn. 



139 \y\\\.ov\ So%verby. The editors of the 

 Zoological [oiirnal ?ii this time were 



Bell, Children and J. de C. and G. B. 

 Sowerby. As the last two were the 

 conchological members of the group 

 it seems reasonable to credit them 

 with the description of this species. 



174 TiMOCLEA Leach in Brown. 



175 Chamel.^a Li. dr A. Adams, Klein 

 being pre- Linnean. 



195 Gari Schumacher has precedence of 



PsamvtOhia Lamarck by one year. 



Above this insert the family name 



" Garid.e." 

 197 For V. pallida Marshall read 



Cochcrell. 

 205 Pharus Leach iti Gray. 

 216 Barnea Leach in Jiisso. 

 218 ZirphaeaZ (,'«<:///» Grayo.(X<\\_ = Pholas'] 

 233 Martesia striata to precede Pho- 

 ladidea loscombiana. 



Martesia Leach in Blainvillc. 

 239 Thracia LeacJi in Blainvillc. 

 267 For evidence see Jeffreys, Proc. 



Zool. Soc, 1882, p. 657. 



274 Delete "v. depressa Pennanl,''' and 

 insert as a species. 



depressa Pennant \_~aihlelica\ 



275 For Patina Ltach in Gray read 

 Helcion Montforl. The British 

 form does not seem to be generically 

 distinct from Montfort's type Patella 

 pCitinata Born. 



285 Delete " Emarginula elongala." 



326 Delete "z'. c\&\.\i2i leffreys." 



346 Zippora Leach in Gray. 



357 Assiminea Leach in Fleming. 



359 stagnalis (Baster) not Basterot. 



37 1 add [ = tniiicatnla]. 



381 Natica catena v. leckenbyi, for 



evidence see Ann. Nat.\Hisl. (4) vol. 



16, p. 393, Dec, 1875." 

 467 Jeffreys in Monterosato. 



