82 THE NAUTILUS. 



L. iridella,, NAUTILUS, XXII, no. 8, pi. 12, two lower right 

 hand figs. 



This species was decided to be new when we studied Mr. Hinkley's 

 Mexican shells in 1907, and so indicated in correspondence between 

 the authors and Mr. Hinkley. It was figured as Lampsilis iridella in 

 this journal for December, 1907. It is related to V- popei and U. 

 medellinus (see NAUTILUS, Nov., 1907, p. 80). 



In this connection attention m'ay be called to the newly-described 

 Lampsilis salinasensis Simpson, in Dall, Proc. U. S. Nat. Mus., 

 1908, p. 181, pi. 30, f. 3, type loc., Salinas River, Coahuila, also 

 reported from Valles River, Valles, Mexico. This form is closely 

 related to L.jimbriata Frierson, from the same place, figured on the 

 same plate of the NAUTILUS with L. iridella. 



NOTES. 

 A NOTE ON THE TYPE LOCALITY OF PALUDESTRINA SALSA, AT 



COHASSET, MASS. The largest and finest specimens were found on 

 rocks and eel-grass in about a foot of water and not more than three 

 hundred yards from where the creek empties into Cohasset harbor. 

 A dam and tide gates over which the salt water flows for only one or 

 two hours at the top of each tide prevent the water at the epot where 

 the shells were found from being as salty as one would expect, while 

 a considerable amount of fresh water received by the upper part of 

 the creek flows out on top of the salt water without mixing with it 

 completely. Therefore the surface water is only brackish, not salt, 

 and forms every winter very good black ice almost to the dam. 

 Specimens were also found on floating plants about a mile further up 

 the creek where the water has practically no salt in it. Dr. Pilsbry 

 had specimens from both localities at the time he described the 

 species OWEN BRYANT. 



VALVATA HUMERALIS CALIFORNICA n. subsp. The shell is 

 much more depressed than V- humeralis, the last whorl descending 

 less ; whorls convex below the suture, not flattened there as V. 

 humeralis is. Alt. 2.7, diam. 4 mm. Bear Lake, San Bernardino 

 Mts., California, collected by Mr. S. S. Berry. H. A. PILSBRY. 



HERON HELD PRISONER BY CLAM. BLOOMSBURG, PA. Walk- 



