130 LIFE OF ALBANY HANCOCK, BY BE. EMBLETON. 



educated to the study, and who held the highest places in the 

 ranks of the cultivators of natural science. 



During and after the year 1858 he produced numerous papers ; 

 with Mr. Alder on the Nudibranchiata, and alone on the Cepha- 

 lopoda, on the Freshwater Bryozoa, and on Hydra.. 



In conjunction with Mr. Alder, in 1863, he classified and de- 

 scribed, in the Transactions of the Zoological Society, a collec- 

 tion of Indian JNudibranchiata, sent by "Walter Elliot, Esq. 



"With Mr. Howse he contributed valuable papers on the Eossil 

 Remains of the Marl-slate of Durham, and with Mr. Atthey, 

 various descriptions of the Eossil Eauna of the Northumberland 

 Coal Eield. 



Eor these last additions to science the authors deserve high 

 credit, and the thanks of all Palaeontologists, seeing the lucid 

 descriptions they have given of the remains of the ancient fishes 

 and reptiles submitted to their investigation, and the satisfac- 

 tory manner in which, with every modesty, they have cleared 

 away a cloud of errors and hasty generalisations of previous 

 writers whereby the study of these interesting relics of a past 

 Eauna had been rendered unnecessarily complicated and difficult. 



"We now come, lastly, to notice the Avork which was unfortu- 

 nately left incomplete at the time of his lamented death, and 

 I have been very kindly furnished by the Eev. A. M. Norman 

 with the following particulars of information as to the origin and 

 progress of the intended Monograph on the British Tunicata, 

 which, it was expected, would form a companion volume to 

 that on the Nudibranchiata. 



Mr. Alder had for some years been engaged in the preparation 

 of an Illustrated Catalogue of the British Tunicata, to be pub- 

 lished by the British Museum as a companion to the catalogues, 

 by Busk on the Polyzoa, by Spence Bate on the Sessile-eyed 

 Crustacea, etc. 



Mr. Alder's catalogue was almost ready for publication, and 

 the plates were prepared, when it was intimated to Mr. Alder 

 that funds were no longer at the disposal of the Trustees for the 

 publication of the work. It now became a question what other 

 means could be found to ensure its publication, and Mr. Alder 



