THE NAUTILUS. 105 



to exchange shells. That is a matter which rests entirely with the 

 members themselves. We would suggest, however, that members 

 desiring to exchange specimens would announce the fact in the Nau- 

 tilus, through the Secretary, and in that way they might add to 

 their collections. 



It is an obligation of membership to assist each other with in- 

 formation, where possible, and no member should hesitate to address 

 another if he requires help in his studies. As far as possible, mem- 

 bers desiring information upon any special point should address the 

 members whose specialties will designate them as likely to be pos- 

 sessed of the requisite knowledge. A student of marine mollusca 

 should not be asked to name Goniobases or Unionidae and vice 

 versa. The entire range of Conchology both recent and fossil is 

 now covered by members, and there should be no difficulty in gain- 

 ing all the knowledge that can be acquired through correspondence. 

 We have ever found the members kind and courteous, as well as 

 patient, in answering queries and aiding us to settle disputed points. 

 The more correspondence, the more beneficial will be the existence 

 of the Association. 



Donations to United States Collection. 

 The publishers of the Nautilus cannot give us the space to print 

 itemized lists of all the shells received, as was done in the last two 

 numbers, but we will continue to acknowledge from month to month, 

 but in less extended form, the donations to the collection. The 

 following additions to previous lists show the rapid progress of the 

 collection. 



G. W. Lichtentlmler, Blooniington, 111.— 51 species of West Coast 

 Shells, including Triton (Priene) Oregonensis, Redf Port Town- 

 send, Wash. ; Astralium undosum. Wood, Rincon Pt. Cal. ; 

 Sadidomus Nuttallii, Conrad, Alaska ; Pecten hastatus, Sby. 

 var. Hindsii, Cpr., Squimalt Bay, B. C. ; Mures festivus, Hinds, 

 False Bay, Cal. ; Macoma secta, Conrad, Alaska ; Nassa tegula, 

 Reeve, San Diego, Cal. ; Macoma iuquinata, Desh., Alaska ; 

 Chama spinosa, Sby. and exogyra, Conrad ; five species of Chi- 

 tons ; Acmaea persona, Esch., scabra, Nutt., patina, Esch. and 

 pelta, Esch. ; Solecurtus Californianus, Conrad, San Pedro Bay, 

 Cal. ; Pecten bella, Conrad, Pliocene, Santa Barbara, Cal. ; 

 and also several fine sections of shells, showing the interior 

 structure. 

 C. Antoinette Shepard, New Britain, Conn. — Strophia Floridana, 

 Dall, and Venus penita Conrad, Miocene Silex Beds, Tamj^a, 



