THE HISTORY OF THIS WOEK. XI 



brane or organ was removed, thus mastering every 

 detail, and then, aided by the numerous sketches before 

 him, the finished drawing was produced. Now among 

 the mass of drawings relating to the Tunicata, com- 

 paratively few have been finally perfected. These 

 have been here reproduced, together with such careful 

 selections from the rest of the drawings as seemed to 

 possess most value. 



A large amount, of work has been undertaken by Mr. 

 John Hopkinson, the Secretary of the Society, in the 

 preparation of the Monograph for the press. With 

 much labour he has filled up the blanks which had 

 been left in the bibliographical history, and done a 

 great deal in the elaboration of references, and the 

 verification of various details. The result of some of 

 his work will be recognised by the circumstance that 

 all numbers, words, and passages which he has sup- 

 plied are enclosed in brackets in order to indicate that 

 they were not in the MSS. of the authors. In addition 

 to all this Mr. Hopkinson has arranged on the plates 

 and in the text all the drawings selected for publica- 

 tion, and when necessary deepened the outlines, etc., 

 in order that they might come out more satisfactorily 

 in the photographs. 



It maybe well, in conclusion, to make some remarks 

 on the MS. and the figures of the species. The MS., 

 as received from Newcastle, was a transcript which 

 had been made by Mr. Joseph Wright, of the Museum 

 there, for more ready use by Professor Huxley. The 

 original MSS. would appear to have been since mislaid. 

 The transcript has been carefully made, and the por- 

 tions which had been in the handwritings of Alder and 

 Hancock respectively have been scrupulously indicated. 

 In the account of the species the diagnostic characters 



