THE 



VOYAGE OF H.M.S. CHALLENGER. 



ZOOLOGY. 



REPORT on the Lamellibrancuiata collected by H.M.S. Challenger during 

 the Years 1873-76. By Edgar A. Smith, F.Z.S., Assistant in the 

 Zoological Department of the British Museum. 



INTRODUCTION. 



The following Report upon the Lamellibranchiata obtained during the Challenger 

 Expedition consists almost exclusively of a list of the vaiious species compiised in the 

 collection, with such remarks connected with each as were thought to be of sufficient 

 interest for publication, and of the descriptions of the numerous forms which apparently 

 are new to science. The time at my disposal for the preparation of the work ha\'ing 

 been rather limited, the revision of several of the genera, which in the course of studying 

 some of the species has appeared desirable, has had to be abandoned. Only in a few 

 instances has an account of the soft parts preserved in spirit been given, as these are to 

 be placed in other hands for examination and anatomical description. 



Before the collection was handed over to me it had already to a great extent been 

 identified by the Rev. R. Boog Watson, who is reporting on the Scaphopoda and 

 Gasteropoda of the Expedition, and it is with much pleasure that I bear testimony to 

 the very great assistance I have derived from his labours. 



In the first place, I escaped the great trouble of sorting the numerous species into 

 separate boxes and bottles, and of writing the localities, depths, &c., upon them. This, 

 however, is but a slight advantage in comparison with that of having the identifications 

 of one whose powers of perception are second to those of no other conchologist of my 

 acquaintance, and whose carefulness and thoroughness must have been recognised by 



(ZOOU CHALL. EXP. — PART XXXV. — 1885.) Mm 1 



