320 AMERICAN JOURNAL 



is attached by Carpenter himself to minute details of sculpture, 

 and I have found species, in that family and others, of which 

 the shells are scarcely distinguishable, to differ generically in 

 the soft parts. 



Mr. Dall says that the " tentacles are consolidated and lost in 

 the expanded lobes of the muzzle." He then proceeds to name 

 these lobes "ears," although they undoubtedly serve the pur- 

 pose of tentacles, that is, for touch, while their auditory func- 

 tion is doubtful, though possible. His highly magnified figure 

 shows that, instead of being pectinated, the serrated marks are 

 merely colored, (or indicate internal folds, if I understand him.) 



It is certain that in my young ones the tentacles were sub- 

 circular, and appeared from above flat and lobed. 



It is quite possible that the young animal is different in form, 

 and really branchiate, afterwards leaving the water and becom- 

 pulmonate. I have found the adult at Santa Cruz above the 

 highest tides as described by Mr. Dall. Larval differences exist 

 among mollusca, quite as strange, and are familiar to us in the 

 higher Batrachia. 



NOTE ON "WALDHEIIVriA PtJLVINATA, GLD. 



BY J. G. COOPER, M. D. 



In Mr. Ball's recent review of the Terehratulidce he makes 

 the statement that the range of distribution given by me, in my 

 Geographical Catalogue, for the above species, namely : "Puget's 

 Sound to the Arctic Sea," is ■•' entirely gratuitous." 



If Mr. Dall (and others) will look at Dr. P. P. Carpenter's 

 report to the Brit. Assoc, for 1863, p. 586, they will find " T. 

 pulvinata^ Gld., Arctic Ocean, gravel 30 fms.,'' as collected by 

 Dr. W. Stimpson, and determined by Dr. Gould himself (p. 583). 

 They may also rest assured that I can give good authority for 

 all the ranges of species in the Catalogue. 



