8 CYPBJEA. 



dentibus parvis, crebris, columellas medio depressis, lineari- 

 bus ; variat seriebus macularum nullis, callo terrninali antice 

 conspicuo. 



15. quadrimaculata, Gray, (f. 275-277).— C. testa, C. in- 

 terruptce simili, superne ad spiram magis truncata, ad ex- 

 tremitates maculis nigris quateruis ornata ; dentibus labii pau- 

 cioribus, columellas ad medium multo magis elongatis. 



Note. — Interrupta, quadrimaculata. Although we may 

 characterize 0. interrupta as having bands of flashes or long 

 bent spots, etc., and G. quadrimaculata as having the four 

 large, conspicuous, terminal, black spots, yet the one occurs 

 without the band, and the other (var. " pallidula ") without 

 the spots. Var. pp. 274 and 275, has been designated as a 

 distinct species, under the name of rhinoceros (Desh.), on ac- 

 count of the callous swelling of the anterior terminal deposit. 

 The character exists in most specimens in a greater or less 

 degree. 



16. Caurica, Linn., (f. 188-193 ; forma monstrosa, f. 318, 

 319). — C. testa, subcylindracea, seu ovata, subdepressa, 

 crassa, terminis obtusis, lateribus plerumque incrassatis, 

 irregulariter subnodosis ; dorso albido, punctis minutissimis 

 flavicante-fuscis creberrime picto, hiatu angusto ; lateribus 

 fulvis, frequenter subtilissime striatis, guttis nigerrimis con- 

 spicuis hinc illic ornatis ; basi fulva; dentibus elevatis, albis, 

 distantibus, utrinque elongatis. 



17. cruenta, Gmel., (f. 185, 186, 187).— C. testa 0. Cau- 

 ricce simili, magis ovata, regulari, terminis magis acumi- 

 natis ; colore ad dorsum maculis albis subrotundis irregula- 

 riter interrupto, maculis lateralibus purpureis ; dentibus 

 columellas baud tantum elongatis, interstitiis dentorum vivide 

 sanguineis. 



Note. — Caurica and cruenta. The former is a much 

 coarser, more irregular shell than the latter, both in form 

 and colouring. In cruenta the ends are more gathered up, 

 as it were, and acuminated ; the colouring on the back is 

 delicate, and interrupted by more or less distinct white spots. 

 The side spots are purple, and the interstices of the teeth 

 bright red. Fig. 190 represents a shell having most in 

 common with G. Caurica, although as to colouring it is 

 rather puzzling, presenting an intermediate appearance. In 

 the columella of cruenta, a greater degree of roundness has 

 been observed beyond the superficial edge of the latter. 



