L I Y A . 



Species 16. (Pig. a, b,c,e,g,i, Miis. Cuming; 

 F\g. d,/,/i, Mus. Steere.) 



Oliv.\ reticularis. Oliv. testa ovatd, vel oblotii/d, vd 

 dongato-cylindraceii, interdum poslice tmnidd, a/iice 

 exsertutsculd, plicis columdlaribtis numerosis, plurimis 

 siepi evanklis ; alhidd aut cinerascente, fiisco aid ni- 

 gricante-fusco profuse acute punclato-reticidatd, reti- 

 culd ad suturas lineatd aut acuminatd, columelld ad 

 bami plermique plus minus violaceo-fusco tiiictd, aper- 

 tures fauce albidd. 



The reticulated Olive. Shell ovate, or oblong, or 

 elongately cylindrical, sometimes swollen posteriorly, 

 apex rather exsertetl, columellar plaits numerous, 

 many of them frequently obscured ; whitish or pale- 

 ash, painted with a brown or black dotted net-work, 

 which is gathered at the sutures into lines or acumi- 

 nated blotches, coliunella mostly stained more or less 

 with violet-brown, interior of the aperture whitish. 



Lamarck, Anim. sans vert. (Desbayes' edit.) vol. x. p. C1.3. 



Varietates. 



Oliva araneosa, Lamarck. 



()liva Timoria, venulata, obesimi, and //indnr/iKi. L)iiclos. 



Hub. Gulf of California; Donnet. Island of (ji-anaila, 

 West Indies ; J. Cuming. 

 L'he .specimens represented in the accomiianying plate 



ale selected with the view of illustrating the different 



jjhases of this extremely variable species, that have been 



distinguished by other specific names. Fig. a is Laniaick's 

 type 0. reticularis, narrow in its proi)ortions, and mostly 

 of smaller size, with the net-work more spaced, after the 

 manner of O.fiammulata, and the sutural lines of pattern 

 more prolonged. Fig. b represents Duclos' 0. venulata, 

 in which the net-work is broken up into large blotches, 

 and the basal violet-browii blotch rather prominent. Fig.t- 

 is the 0. obesina of the same author, stouter and more 

 gibbous in form, with the net-work somewhat similar but 

 more or less obscured by an overcharge of milky-white 

 enamel. Fig. d, the finest state of the species, of w hich a 

 dark chestnut-coated variety is represented below at Fig. g, 

 is Lamarck's 0. araneosa, and has the net-work small, 

 crowded, and confused. Fig. e, a remarkable form, in 

 which the posterior portion of the shell is very stout and 

 swollen, antl the pattern small, confused, and partially 

 banded, is Duclos' 0. Timoria, though certainly not an in- 

 habitant of Timor. Lastly, the oblong contracted variety, 

 Fig./, is the U. piudariim of the same author. 



Besides the above-mentioned named vaiieties, are two 

 very characteristic states of the species. Fig. h, i, in PI. XI. 

 Ill the former the net-work is peculiarly waved, and in parts 

 is over-coated with streaks of bright chestnut ; in tlie 

 latter the shell is of a peculiar oblong-cylindrical form, 

 and the net-work is small, confused, and aggregated in 

 bands. This variety is not far removed from 0. sptendi- 

 diila. 



August, isr.u. 



