76 



fresh-water gasteropod molluscs, and therefore to be pre- 

 ferred for early studies. 



According to Dujardin and Owen sexual contact occurs 

 in the warm season, especially in August, the ova being 

 deposited in from fifteen to thirty or forty days afterwards. 

 In Michigan the ova are deposited by both genera about 

 the fii'st of May and as before stated are incubated in three 

 or four weeks. Are there not, then, at least two broods 



in one season 



Regular Meeting, Monday, April 2, 1877. 

 Meeting this evenins^ at 7.30 o'clock. The President 

 in the chair. Records of last meeting read. 



Rev. E. C. BoLLES, from a committee appointed at a 

 previous meeting, reported the following resolutions : — 



Whereas : Mr. Edwin Bicknell, for many years associated with the 

 Essex Institute, has recently been removed by death from his labors 

 in the cause of science ; and it thereby becomes the appropriate duty 

 of that body to place on record its appreciation of the skill and char- 

 acter of its lamented member ; it is therefore 



Sesolved, That the Essex Institute has long recognized with pleas- 

 ure, the merited distinction which Mr. Bicknell has attained by his 

 profound acquaintance with the theory and practice of the micro- 

 scope, and his unrivalled skill in the manipulation of that instrument, 

 as well as in the preparation of specimens for its use; — a distinction 

 which was as widely spread as the employment of the microscope 

 itself, and which will always place his name among the most success- 

 ful laborers in microscopic investigation. 



Besolved, That his valuable services have been known and honored, 

 not only in the Essex Institute, but also in other eminent societies of 

 Natural History ; while it was his peculiar worth which gave him a 

 place with the first scientific teacher of our country, at the Cambridge 

 Museum of Comparative Zoology and the Anderson School of Natural 

 History at Peuikese. 



Besolved, That his unexpected decease must be regarded as a great 

 misfortune to the practical science of our day ; and that sorrow at the 

 close of a life in the full course of such usefulness must extend beyond 

 the immediate circle of specialists in Microscopy to all who are occu- 

 pied in studying the forms of Natural History or investigating their 

 development. 



