144 THE NAUTILUS. 



same territory. It will be useful to give a description of the living 

 H. h. maculatus. 



Length when crawling about 27 mm.; light greyish olivaceous, 

 the head and anterior part of mantle paler and yellower, the ocu- 

 liferous tentacles reddish ochreous. With a lens the surface of the 

 animal is seen to be sprinkled with pale dots. Mantle almost im- 

 maculate, only a few obscure small dark or dusky spots. Sides of 

 body caudad of mantle with conspicuous scattered black spots, none 

 very large. Sole pale, without dark markings. In alcohol the 

 animal is about 14 mm. long ; mantle 6 mm., appearing dusky with 

 pallid margins ; margin of foot wholly immaculate. Shell convex, 

 3^ mm. long, 2^ broad, white, opaque. Jaw with eleven flattened 

 ribs, occupying the middle half. Teeth about 27-1-27, the lateral 

 four or five with short blunt cusps. T. D. A. COCKERELL. 



SOMETIMES LOCALITY ADDS INTEREST TO A SHELL. In Notes, 

 December, 11)11, p. 95, appeared a word on Vallonia in Chicago. 

 My offer to send some to anyone interested brought many replies, 

 and led to friendly exchanges. I now have two other " finds " to 

 share. The first is Pisidium hiiachucanum Pils., collected in Colo- 

 rado at an elevation of 7500 feet. Found in one little pond about 

 10 by 12 feet, all hidden in tall grass. The other, Planorbis vermi- 

 cularis Gld., collected on Modjeskas ranch California in summer of 

 1913. These were from an artificial pond away off in the desert, 

 miles and miles 4< away from anywhere. " Puzzle how did they get 

 there? On feet of aquatic birds? If anyone wishes specimens of 

 these let him speak. EDWIN E. HAND, Wendell Phillips High 

 School, Chicago, 111. 



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