THE NAUTILUS. 135 



possible at the present time to place the specimen in any de- 

 scribed genus." 



The resemblance to L. luteolus is remote and is confined to the 

 character of the teeth. The resemblance to Quadrula naduhiUi 

 is more intimate. The undulations of the umbones are of the 

 Quadrula type and of course entirely different from the double- 

 looped, fine, wavy undulations of luteolus. The teeth are as 

 different from those of Quadrida as the undulations of the um- 

 bones are different from Lampsilis, and consequently the shell 

 cannot belong to either of those genera. There seems to be no 

 possibility that the shell can be a smooth Q. undidata nor a hy- 

 brid of L. luteolus and Q. undulata and consequently it requires 

 a new generic name. 



LAND-SHELLS FEOM ANAFE HILL IN THE HAVANA 

 PROVINCE, CUBA. 



JOHN B. HENDERSON. 



The Havana province has been so much exploited by natura- 

 lists it could hardly be expected to offer any more novelties to 

 a conchologist. On the contrary it appears to yield almost as 

 much in the way of new species as does any other and larger 

 province of the island, — and this, too, despite a denser popula- 

 tion, a minimum of forest, a greater relative area under culti- 

 vation and an insignificant mountain system. So rich is this 

 state in numbers of species, the many Cuban naturalists who 

 have lived in or near Havana and three generations of visiting 

 collectors who have ransacked the province, have not yet ex- 

 hausted it of its treasures. Doctor Torre has quite a formidable 

 collection of novelties from Madruga and its neighboring hills, 

 and what is even more remarkable, a new sinistral Urocoptis 

 from the golf-course of the country club scarcely more than 

 without the city limits of Havana. Upon mj- return to Havana 

 after roughing it in the wilds of remote Cuba I always detect a 

 twinkle in Dr. Torre's eye as he matches my hard-won discover- 



