137 



OBITUARY. 



Alexander Onufpievitch Kowalevsky. 



Born November 20th, 1840. Died November 22iid, 1901. 



The death of Professor Kowalevsky removes a zoologist of renown, and 

 one whose studies ranged over a wide field. In the Mollusca he in- 

 vestigated the development of Chiton and Dentale, the structure of 

 Pseudovermis and the Hedylidae, and in conjunction with Professor 

 A. F. Marion, the Solenogastres, and with Ovsyannikov, the central 

 nervous system and auditory organ of the Cephalopoda. 



Oliver CoUett. 



Born 1867. Died June 13th, 1902. 



By the untimely death of Mr. Oliver CoUett, Malacology has lost a 

 devoted and single hearted student of the Cingalese mollusca 



When, in 1898, I resumed the Editorship of this Journal, Mr. 

 Collett wrote me inquiring if, in connection with my work on Asiatic 

 molluscs, I cared to examine any of those from Ceylon ; this was the 

 commencement of a regular correspondence, which, alas ! has all too 

 soon ceased x\s I write, there lies before me the latest consignment 

 from him (one of very many which he has sent me, and which, as yet, 

 have been little more than examined in opening), containing examples 

 of Nilgira, Arioplianta, Eupleda, Veronicella, etc., all beautifully 

 preserved. 



Mr. Collett while engaged in his vocation as a tea planter, found 

 time for much zoological work. As a member of the Ceylon branch of 

 the Royal Asiatic Society, he contributed various papers to their 

 Journal. 



He died on June 13th, somewhat suddenly at Columbo, from an 

 attack of dysentery. 



Much of the material collected by Mr. Collett has been described 

 by Dr. Blanford, Mr. E. R Sykes, Lt. Col. Godwin-Austen, myself 

 and others. Some, however, he described himself in the following 

 papers : 



1. "Description of Sfrppiaxis (jracilis, n. sp., from Ceylon." Proc. 



Malac. Soc. London, 1^ • 



2. " The Terrestrial Mollusca of Ambagamuwa." Journ. Ceylon Asiat. 



Soc, 1897, vol. XV, pp. 12 — 21. 



3. " On two new varieties of Cataulus nietneri, G. and H. Nev., from 



Ceylon." Journ. of. Malac, 1899, vol. vii, pp. 85, 86, 3 figs. 



4. " Description of a new Helicoid land shell from the Southern 



