~I 
~I 
THE NAUTILUS. 
(4.) Uibellula ,0045 v. nov. (two specimens.) 
(5.) libellula 12,345 v. nov. 
(6.) libellula 12X345 v. nov. (juv.) 
(7.) libellula 123,45 v. nov. 
(8.) Libellula 10300 v. nov., but also British. (juv.) 
(9.) libellula (123)(45) = gronovia Moq. In Europe, this variety 
is found in France, England, 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 Mog. (juv.) 
(11.) hibellula 1(23;),(45) v. nov. (juv.) 
(12.) libellula 123345 v. nov. (juv.) 
(13.) libellula 000,...00 v. nov. 
(14.) libellula 12;,,45 v. nov. (juv.) 
(15.) hbellula 12,3(45) v. nov. (juv.) 
(16.) libellula (12)345 Mog. (juv.) 
(17.) libellula (12)X3(45) v. nov. 
(18.) libellula 120,45 v. nov. 
(19.) libellula 1,,3(X4)5; v. nov. (juv.) 
(20.) libellula 12(84)5 Kregl. (juv.) 
(21.) libellula 02345 = Schreteria Mogq. 
(22.) libellula 1030,(,5) v. nov. (juv.) 
(23.) petiveria 12,45 Ckll. 
(24.) petiveria 1,545 Roebuck. 
(25.) petiveria ,,345 Fenn. 
(26.) petiveria 12045 == Michaudia Loe. 
(27.) petiveria 125445 Borcherding, = var. sexfasciata 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. 
West 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 
