8? 



of nearly white. The epidermis in this species is very thin and pale- 

 coloured, and it has alternating darker marks close to the suture. 

 A variety occurs of a nearly uniform pale brownish yellow colour, 

 though in other respects similar. 



I gladly adopt Lea's manuscript name of cepoides. 



Helix (Helicostyla ? De F.) arata. Hel. tesld ovatd, subcy- 

 lindricd, crassiusculd, rufo-fuscescente,fascid antemediand albidd ; 

 anfractibus senis, suhventricosis, oblique exaratis, subrugosis ; 

 suturd distinctd, crenulatd ; apeHurd fere circulari, intHs albd, 

 peritremate expunso, subreflexo,fusco ycolumelld albd; umbilico 

 mediocri. Long. 11, lat. I'l poll. 



Hab. ad insulam Tablas Philippinarum. 



Variat testd omninb pallide lutescente, aperturd peritremateque albis. 



The two varieties of this remarkable species differ so much in 

 colour that they might at first sight be regarded as distinct species ; 

 I do not, however, discover any real difference in their conformation, 

 and therefore am compelled to unite them as varieties. The ridges 

 between the furrows vary greatly in their distance from each other ; 

 they appear to be more and more frequent as the shell increases in 

 age. 



Helix (Helicostyla ? De F.) adusta. Hel. testd oblongd, sub- 

 cylindricd, castaned, Imvigatd, tenuissime lineis incrementi striatd, 

 fascid antemediand pallidiori ; anfractibus senis subventricosis ; 

 suturd distinctd; aperturd fere circulari, ititus albicante ; peritre- 

 mate leviter expanse, reflexo,fusco ; columelld pallidd ; umbilico 

 parvo. Long. 1*8, lat. 1" poll. 

 Hab. ad insulam Tablas Philippinarum. 



This species resembles the last in form as well as colour ; it differs, 

 however, in its general proportions, as well as in being entirely free 

 from the numerous and deep oblique grooves so remarkable in that 

 species ; its umbilicus also is smaller. 



Helix (Helicostyla ? De F.) brachyodon. Hel. testd ovato- 

 subcylindricd, tenui, castaned, fascid anticd pallescente ; anfracti- 

 bus quinque ad sex subventricosis, lineis incrementi tenuiter ob- 

 lique striatis ; suturd distinctd, leviter crenulatd ; aperturd sub- 

 orbiculari, intus albicatiie ; dente obtuso, antico, albo ; peritremate 

 subincrassato, refiexo, subexpanso, interne inter columellam den- 

 temque simiato ; columelld albd, obtusd ; umbilico parvo. Long. 

 1-95, lat. 1-3 j)oll. 



Hab. in foliis arborum prope Puerto Galero ad insulam Mindoro 

 Philippinarum. 



Variat testd breviori, colore saturatiori, striisque fortioribus. Long. 

 1-35, lat. 1-2 poll. 



I have named this species Brachyodon, from a short white tooth 

 jjlaced at the inner and anterior part of the lip, and which appears 

 to be constant, I do not hesitate to regard the shorter specimens as 

 merely a variety, though thoy differ greatly in their proportions fi'om 



