Difcctors Annual Report. ii 



Dr. Cooke's Report. 



Dr. William T. Brigham. 



Dear Sir: — Inclosed please find a report on the results of 

 my trip to stud\" the t\-pes of our Hawaiian L,and Shells. As you 

 can see, we now have specimens of a majority of the species of the 

 less known genera of our shells. About one hundred, more or 

 less, new species are in our colle(5lion and are to be described as 

 soon as the different genera are worked up. The types of these 

 new species are to be in our colle6lion. I wish to thank you for 

 the encouragement you gave me and, also, for the extended time 

 to complete the list of descriptions not in our library, and to work 

 with Dr. Pilsbry, this part of the trip occupying the major portion 

 of the time will probably, in future results, prove to be the most 

 important part of the trip. Yours truh', 



C. Montague Cooke Jr. 



The trip, of which the following is a report, was begun in the 

 early part of September, 1905. The object of this trip was to study 

 the types of the smaller and less known species of our land shells. 

 During a previous trip, in 1900, the types of the arboreal species 

 had received attention and careful notes made of the type speci- 

 mens, especially those of Pfeiffer, Newcomb, Smith and Sykes. 



The genera, Leptachatina, Auriculella, Tornatellina, Neso- 

 pupa, Endodonta, Philonesia, etc., are very well represented in 

 our colleclion. The series, belonging to these genera, is probably 

 the best in any collecftion, and contains a large number of unde- 

 scribed species. In working up our coUecftion the writer had 

 considerable trouble in identifying a number of species, as a num- 

 ber of them are insufficienth^ described and in most cases unfigured. 

 A thorough knowledge of these species was therefore necessary 

 before publishing the many ne^v species belonging to our colledtion. 



On receiving the consent of the Direcftor and the Trustees of 

 the Museum, a series was made of all the species and possible 

 varieties belonging to these genera in our collection. Two note 

 books were prepared, one containing a list of all the species and 

 varieties published up to the time of leaving; the other a list of 

 the shells taken along and the probable identification of some of 



