36 I'KOCKKUINGS OF THE 



You made fuiKlameiitally iinportant obsi-rvations on the develop- 

 ment oHhe Mollusca ( Limna'a, I'ahiclimi, Ct/c'as, etc.), determining 

 ain()n<;; other insitters the origin of the genii-layer.s ; anil you first 

 clearly distingiiislied the true hlood- vascular svstein Iroin the 

 c'oeloniii- spaces in iMollusc.i and Arthropoda. You studied and 

 described lihufxlo/ileimi, an interesting colonial form in some 

 respt'cts inleiinediate l)et\\ef'n Polyzoa and Vertebrata (Prolo- 

 cliordata). Among Art hro|)()d>i, vour \aluable work on Afinn was 

 followed bv voiir misterly exposition of ibe structure of fjininlus, 

 proving its relationshi[) to >\-or/ii<) and thus separating it from 

 the Crustacea. At the same time you contrihuteil much to a 

 proper understanding and classification of the Arachnida. Your 

 researches 0:1 the structure and larval development of Ami>hio.vus 

 are of primarv importance in vertebrate morphologv ; and your 

 memoirs on (Uapia Rwd ^Eliirojnis are noteworthy contributions to 

 our knowledge of the higher mammals. Since 1809 you liave 

 edited continuously the 'Quarterly Journal of Microscopical 

 Science,' and kept it in the forefi-ont of jonrnals of zoology. You 

 have also ])lanne(l, edited, and partly written several volumes of 

 an exhaustive Treatise on Zoology. You have st mulated work in 

 others not only by your brilliant professional teachiiig and per- 

 sonal intercourse, hut also by your more general writings, among 

 which I may specially mention your ai-ticles in the ' Encyclopaedia 

 Britannica.' They are modf^ls of clear exposition, concentrating 

 attention on the really essential and int. resting points, with the 

 omission of uunecessarv detail. As one honoured by your friend- 

 ship for the past thirty years, I can testify personally to the 

 inspiring influence you have always exerted, and it c\\'es me the 

 greatest pleasure to be the means of handing to you this mark of 

 esteem from the Council of the Linnean Society, 



The recipient made an acknowledgment in reply as follows: — 

 ^Ir. President and Fellows of the Linxeax Society, — 



I beg permission to say a few words in order to express to you 

 my deep sense of the great honour 3'ou have done to me in con- 

 ferring upon me the Linnean Medal. I feel sensible not only of 

 the distinguished honour given by your selection of me as its 

 recipient, but of the great personal kindness and good-will wh.ich 

 have influenced you. You, Mr. President, are an old friend and 

 colleague of long-standing, and so are others whom I see here — 

 and many have been associated with me as pupils and frllow- 

 workers in the laboratory. The Linnean Society has been a 

 constant source of help and advantage to me since many years 

 ago I first used its library and published papers in its 'Trans- 

 actions.' I became a Fellow forty-four years ago. My actu'il 

 recollection of the Society goes back to the year 1855, when I 

 went with my father to fetch books from its house — formerly that 

 of Sir Joseph J3anks — in Soho Square. Froju that time onwards 

 I have known and been kindly helped in every way by its officers. 



