104 THE NAUTILUS. 



left posterior cardinal tooth rather long, curved, the anterior small, 

 sharply pointed, strongly curved upward, corresponding with an ex- 

 cavation below the right cardinal; laminae ["laterals"] compara- 

 tively stout, the anterior of the left valve markedly projecting 

 inward; ligament rather long; long. 7, alt. 6, diam. 4 mill.; soft 

 parts not examined ; Justice Lalchford writes that the mussel " is 

 of a bright chrome yellow when fresh, and seems to be unlike any 

 other." 



Distribution : Blue Lake, Muskegon Co., Michigan, collected and 

 sent by Dr. R. J. Kirkland in 1899 — the type lot, No. 16'J7 of my 

 collection of Sphcsriidce ; Pine Lake, Marquette Co., Mich., col- 

 lected by Mr. Bryant Walker in 1902 ; Gorman Lake, Renfrew 

 Co., Ont., collected by H. Justice F. R. Latchford in 1911. From 

 the two last named places the specimens are considerably smaller, 

 slighter, and little inflated, the nepionic shell is smaller, and in some 

 specimens barely or not marked off (aestivale form). 



This is a clearly distinct and well-marked species, apparently 

 ranging nearest M. rosaceum Pme. It should be looked for at other 

 places, and especially fossil, in marl deposits, etc. 



COLLECTING FBOM HADDOCK ON THE GEOBGE'S BANES. 



BY W. F. CLAPP. 



Many malacological students believe that shells taken from fish 

 stomachs have no practical locality. It has been argued that it 

 would be an easy matter for a haddock to change it's position 150 

 miles in 24 hours. It is possible that a fish may retain its food that 

 length of time. Therefore a shell, found in a haddock caught near 

 Cape Cod, may have been in Nova Scotia waters the day before. 

 This of course would apply only to those shells which had passed 

 through a considerable portion of the intestines, for one is sure of 

 the habitat of a shell in proportion to the distance it has traversed 

 the digestive tract. I believe that Gould and other authors who 

 have described shells found in fish, intend the word stomach to in- 

 clude the entire alimentary canal. Less than 5 per cent, of the 

 shells I have found in fish came from the stomach proper. 



