103 



apex is much more obtuse than in that species : its peritreme, more- 

 over, is thinner, and although reflected, it is not rounded as in that 

 species. 



Helix (Cochlostyla, De F.) Orbitulus. Hel. testa subglobosa, 

 crassiuscula, Itevi, oblique lineis incrementi tenerriml insculpta ; 

 anfractibus A\ ad 5, subventricosis, ultimo maximo, ventricosiori ; 

 suturd distinctd, antice albd ; aperturd subrotundd, intiis albd ; 

 peritremate latiusculo, rotundato, reflexo, albo ; columelld albd, 

 rectiusculd, paululum inflexd. 



Long. 1-1 ; lat. Tl poll. 



Hab. propfe Mansalai ad insulam Mindoro, Philippinarum. 



Var. a. Shell nearly globular; spire very obtuse, white, base dull 

 yellowish ; two spiral green bands commence at about the third vo- 

 lution, and increase in width and strength of colour until they reach 

 the back of the outer lip ; of these the lower is by much the broader. 



Var. b. Shell oblong, and coloured in the same manner as the last; 

 but the last volution is green.above (the anterior side of the suture 

 being always pure white), increasing in intensity from its commence- 

 ment : in this variety the dull yellowish colour of the anterior or 

 basal part of the last volution is much deeper than in var. a. 



Var. c. Shell larger ; its volutions rather more ventricose, similar 

 to the last in colouring, but having two additional dark brown, nearly 

 black bands, which are distinctly seen within. This is by far the 

 largest and handsomest variety of the three. 



^ote. — " M. Valenciennes informs me that this species was brought 

 in 1 830 by the officers of the " Favourite," and placed in the galleries 

 of the Museum of Paris, under the name of H. chlorogrammica, Val. ; 

 but as it does not appear that he has published either the name or 

 any description of the species, I continue to use the name which I 

 have given it above." 



Helix (Cochlostyla, De F.) Oomorpha. Hel. testa ovato-ob- 

 longa, crassa, obscura, spiraliter tenuiter substriata, lineis ina'e- 

 menti decussata ; anfractibus quinque subventricosis ; suturd di- 

 stinctd ; aperturd suborbiculari, intiis obscurd ; peritremate /eri 

 continuo, albo, reflexo, rotundato ; columelld subundatd, labia co- 

 lumellari extenso, ad umbilicum fere velato ; umbilico mediocri. 

 Long. 1-1 ; lat. 07 poll. 



Hab. ad insulam Tablas dictam, Philippinarum. 

 Mr. Cuming has obtained only a single specimen of this species : 

 it is very different from all the others, its peritreme being continuous 

 nearly all round, the only interruption being about a seventh where 

 it is intersected by the last volution ; colour dull light brown, with a 

 dark brown band in front of the suture ; the greater part of the last 

 volution dark brown, and having a light narrow band near the um- 

 bilicus in addition to the light band near the suture. 



Helix incompta. Hel. testa ovata, tenuiuscula, obscura; epider- 

 mide fused, haud nitente induta, oblique tenuiter lineis incrementi 

 striata; anfractibus quinque subconvexis, ultimo majori ; suturd 



