10 



COMPARATIVE ZOOLOGY. [Mar. 



which have from time to time been incorporated with those 

 previously on hand in order to introduce those from new 

 localities, or better specimens has rendered the requisite 

 mounting of these specimens a task of no small magnitude. 



The collections which were mentioned in the last report as 

 having been prepared for the use of the normal schools in 

 the State, have since been forwarded to each school, and, we 

 trust, may be the means of extensive usefulness. 



Our exchanges during the present year have been about as 

 numerous as usual, and having been mainly restricted to such 

 species as were really needed to increase our own collection, 

 have resulted in our receiving fewer duplicates than usual, 

 but still enough to keep up our stock for such purposes and 

 to furnish our large and increasing list of correspondents 

 with all that they require at our hands. We have received 

 from all sources, in this way, during the current year, 27 boxes 

 of shells, containing 1,477 species and 20,721 specimens; 

 and among the specimens received have been some of rare 

 beauty and excellence. 



Our generous and constant contributor, the late U. S. 

 consul at Mauritius, Hon. Nicolas Pike, has laid us under 

 special obligation this year, as in former ones, by his kindness 

 in sending valuable and interesting shells. 



From Dr. Henry Dohrn we have to acknowledge several 

 favors, and although his contributions have not been so 

 numerous in specimens as many others, yet they have 

 embraced some of the rarest and most interesting species and 

 specimens we have ever received. Among these, we cannot 

 omit mentioning a few which have been welcomed with 

 peculiar pleasure, — such species as Helix Cainhodiensis, 

 Euptychia oequivoca and Halia priamus are seldom seen any- 

 where, and during fifty years which it has been my lot to 

 study conch ology, I have never found the last named in any 

 collection. 



Mr. Geale,Mr. Owen, Governor Rawson, and other friends, 

 have proved not less mindful of us, and we cheerfully and 

 cordially thank them for aiding so liberally in building up our 

 collection. 



Among the various objects which have received atten- 

 tion during the present year, our catalogue has not been 



