TIIK NAUTILUS. 77 



(4.) libellula i0045 v. now (two specimens.) 



(5.) libellula \2^^ZAb v. nov. 



(6.) libellula 12X345 v. nov. ( juv.) 



(7.) libellula 1 23 345 v. nov. 



(8.) libellula lOSOO v. nov., but ;»lso British, (juv.) 



(9.) libellula (123)(45) == gronovia Moq. In Europe, this variety 

 is found in France, Enghind, and Wales, and the Rev. A. 

 Dean recently sent me examples of it from the Tyrol, and 

 from the Pyrenees.. 

 (10.) libellula 1(23)(45) = brardia Moq. (juv.) 

 (11.) libellula 1(233),(45) v. nov. (juv.) 

 (12.) libellula 128345 v. nov. (juv.) 

 (13.) libellula 000,^^00 v. nov. 

 (14.) libellula 123^^45 v. nov. (juv.) 

 (15.) libellula 12.^3(45) v. nov. (juv.) 

 (16.) libellula (12)845 Moq. (juv.) 

 (17.) libellula (12)X3(45) v. noV. 

 (18.) libellula 120,,45 v. nov. 

 (19.) libellula l2,,3(X4)55 v. nov. (juv.) 

 (20.) libellula 12(34)5 Kregl. (juv.) 

 (21.) libellula 02345 = Schrateria Moq. 

 (22.) libellula 1030,(.-5) v. nov. (juv.) 

 (2Z.) petiveria 12 Ao Ckll. 

 (2A.) petiveria l2o45 Roebuck. 

 (2b.) petiveria 12845 Fenn. 

 (26.) petiveria 12045 =^ Michaudia Loc. 

 (27.) petiveria 123445 Borcherding, = var. sexfa.saiata ]Moq. 



This remarkably variable series only emphasises the peculiarities 

 of the previous one. There is very little variation in the ground- 

 color of the shells. 



Wed Cliff, Colo., Sept. 29, 1889. 



COLLECTING LAND SHELLS IN SOUTHERN CALIFORNIA. 



BY EDWARD W. ROPER. 



"Look where you step" is a good rule to follow in any country, 

 but it is absolutely essential in San Diego county, for two reasons. 

 First, because it is very important, if there is a rattlesnake in your 



