]01 



Hab. in foliis arborum ad St. Jaun Provinciam Cagayan Insulae 

 Luzonicse Philippinarum. 



Two varieties of this remarkable and beautiful species have been 

 found by Mr. Cuming. The similarity of the young shell to Helix 

 picta is very great : the full-grown shell differs, however, very much 

 in shape from that species. Both varieties are remarkable for a 

 bright red apex. 



Var. a. Bright yellow, with a scarlet band placed just before the 

 suture, beginning at the second volution and increasing in breadth 

 with the growth of the shell : this var. has also a blue line on the 

 outside a little in front of the scarlet band, which is black within. 



Var. b. Upper half of the shell bright yellow ; lower half white. 



Helix Roissyana, De F. Hel. testa subglobosa, crass iuscula, lee- 

 vis, coloribus plerumgue albo, nigroque fasciata, et ut assolent 

 epidermide obscurd, haud nitente, obtecta ; spird obtusissimd ; an- 

 fractibus 4^, rotundatis, subventricosis, ultimo maxima, ceeteris 

 quadruplo longiori ; suturd distinctd ; aperturd sublunari, intiis 

 albd, labii externi margine arete revolutd, nlgrd, eolumellari albd ; 

 columelld rectiusculd, planulatd, albd s. albicante. 



Helix Roissyana, De Fer. 'Hist. Nat. generale et particuli^re 

 des Mollusques terrestres et fluviatiles,' tab. 104. f. 2, 3. 



Long. 1-2; lat. 1-4 poll. 



Hab. propfe Puerto Galero ad Insulam Mindoro, Philippinarum. 



Five principal varieties of this species are remarkable ; one alone 

 has been represented, though not described by De Ferussac. If the 

 colours alone were to be depended upon as specific characters, two 

 of these varieties would be considered distinct species. Deshayes 

 has omitted to mention or to describe this species in his second 

 edition of Lamarck (Anim. sans Vert.) ; I am therefore much grati- 

 fied by having the opportunity afforded me of pointing out its cha- 

 racters and making known its several varieties. 



Var. a. White, with a yellowish epidermis, a very dark brown, 

 almost black, antesutural band, and a rather broad, black band sur- 

 rounding the columella. 



Var. b. The same as the last, with an additional broad interme- 

 diate anterior black band. 



Var. c. Similar to the last, with the addition of a black band an- 

 terior to the sutural band, and with the anterior intermediate band 

 much wider. 



Varieties a, b, c, are all found at Puerto Galero. 



Var. d. Nearly black all over, and only showing more or less di- 

 stinct remains of white on the three first volutions ; epidermis very 

 thin and nearly colourless. Found at Calapan, in the Island of Min- 

 doro. 



Var. e. Of a dark chestnut-brown colour, with the same arrange- 

 ment of colour as the last, but covered with a thickish, brown, opake, 

 hydrophanous epidermis. From Puerto Galero. 



I am compelled to regard as a variety of this species a shell which 

 Mr. Cuming has brought fi-om the island of Ta1)las, whose spire is 



