THK NAUTILUS. 125 



Culebra Cut, I/jO to 2C0 feet above mean tide level. Tliere, in 

 squeezed-up marine slratsi, easily recof>nizal)ie marine ppecies may 

 be found in considerable numbers. Some are. perhaps, as old as the 

 Tertiary period, but many of tliem can be duplicated, alive, on the 

 Pacific beaches. Coral is loiind 2G2 f(;et above present mean tide. 

 F'ifteen niiles away in tiie Chagres basin marine deposits are also 

 found. Sometime, not so very long ago, there was an open strait 

 where the Isthmus now is. Is the Isthmus younger, very much 

 younger, than scientifically supposed? How much younger? Is 

 tliere any evidence — not of its age — but of its youth, to be found in 

 the five tons of shell-bearing material sent to Washington by the 

 diggers in Culebra Cut? 1 don't know. I'm only a gatherer of 

 shells — with an imagination and some disposition to ask questions. 



ON SOME CUBAN UKOCOPTIDJE. 



UY 11. A. PILSBRY. 



The following notes relate to new or rare species collected by the 

 writer in 1904. M}' journey was a rather rapid one, undertaken 

 with the object of seeing something of the mollusk fauna of the 

 central part of the island, as nearly all the Cuban shells I had studied 

 had been taken in (he relatively far richer and more frequently ex- 

 plored regions from Havana Province west, and in Santiago Prov- 

 ince, or Oriente as it is now called. 



My route was from Havana to Cienfuegos by rail, thence to 

 Casilda, the Port of Trinidad, by the INIenendez steamship line, 

 thence to Tunas de Zaza on the south coast; by rail then to Sancti 

 Spiritus, eastward to Majagua in Camaguey Province, and return 

 by way of Matanzas. Collecting was done at (he places mentioned 

 as well as at many places along the route, and others within a day's 

 journey on foot or mule from those named. 



Around Havana, IMatanzas, etc., various well-known UrocoptidcB 

 were taken which call for no special notice, and also several forms 

 of the U. eleffcms group — a very dilficult series, not yet worked up, 

 and extremely abundant in the environs of IMalanzas and in Havana 

 Province, Urocoplis cam P. & II., C7. lonya P. & II., and the fol- 

 lowing species niay be mentioned among the new forms taken. 



