THE NAUTILUSi W 



As a fossil, Gundlachia occurs in S. Carolina in a quarternary 

 marl containing mastodon bones (Cook, I.e.). 



[In addition to the records of Gundlachia in North America, 

 compiled by Mr. Hedley, we may instance the finding of numerous 

 specimens in ponds near Greenport, Long Island, N. Y., by Mr. 

 Sanderson Smith, recorded in the Annals of the Lyceum of Nat. 

 Hist, of N. Y., ix, 1870, fig. 6. The specimens differ sufficiently 

 from G. meekiana to be considered by Smith a distinct species, 

 which he names G. stimpsoniana. 



A Gundlachia, closely allied to, if not identical with, G. meekiana, 



Fig. 1- Fig. 2. 



Gundlachia from Rock Island. 



occurs abundantly in a lily-covered pond near Rock Island, Illinois. 

 Specimens are drawn in the illustrations here given (figs. 1, 2), fig. 

 1 representing a shell with small accessory cap, the other figure 

 showing one with it large. All intermediate sizes occur. With 

 these, are found numerous specimens of like asymmetrical contour, 

 but lacking the accessory shell ! These are, as far as the shells are 

 concerned, merely Ancyltia. They live with the true Gundlachias 

 on the lower surfaces of the lily-pads, grazing on their watery pas- 

 ture like little sheep dotting a hillside. Professor B. Shimek has 

 found something very similar to these near Lincoln, Nebraska (see 

 NAUTILUS, August, 1890, p. 48). 



Still another record of Gundlachia is given by Dr. Victor Sterki, 

 who found it at New Philadelphia, Ohio (see NAUTILUS, Jan., 1895, 

 p. 107). Pilsbry']. 



Boettger has ventured to name an immature fossil from the May- 

 ence Basin G. francofuriana (Fischer's Manuel, p. 505). 



A defective monograph of the genus, by Clessin, appeared in 1882 

 in the Conchylieu Cabinet, Bd. i, Abth., 6, pp. 1-5. 



The existence of this genus in Australasia was first announced by 

 R. M. Johnston, who, in March, J877, laid before the Royal Society 

 of Tasmania an account of G. petterdi, from the vicinity of Launces- 



