184 PROCEEDINGS OF THE W ALACOLOGICAL SOCIETY. 



1850. Helix (Avipelita) coticisa, Per. Albei's, Die Heliceen, p. 128. 

 lliiwak Islaiul (Freycinet). 



1852. Helix: cone isa, Fer. Reeve, Conch. Icon., vol. vii, pi. Ixxxvi, 



species 466. Aru Islands (Mus. Cuming). 



1853. Helix concisa, Fer. Pfeiffer, op. cit., vol. iii, p. 238. 



1855. Helix {Ampelita) co7icisa, Fer. PfeifPer, Malak. Blatt., Bd. ii, 



p. 137. 

 1855. Macroci/clis {Ampelita) coticisa, Fer. H. & A. Adams, Gen. 



Eec. Moll., vol. ii, 203. 



1859. Helix concisa, Fer. Pfeiffer, Mon. lielic. viv., vol. iv, p. 287. 



1860. Helix [CJdontis) concisa, Fer. Albers, Die Heliceen, p. 162. 



Rawak, Aru. 

 1865. Semicormi eoncisum, Fer. AYallace, Proc. Zool. yoc, p. 410. 



Waigiou (Wallace). 

 1868. Helix concisa, Fer. partim. Pfeiffer, op. cit., vol. v, p. 374. 



Waigiou (Wallace), Aru Islands (Mus. Cuming). 

 1876. Helix concisa, Y^r. partim. Pfeiffer, op. cit., vol. vii, p. 435. 



Waigiou. 



1880. Helix (Chloritis) concisa, Fer. Ivobelt, Jalirbuch. Deutsch. 



Malak. Ces., Jalirgang vii, p. 12. Waigiou. 



1881. Helix {Chlorit is) concisa, Fer. Pfeiffer, Noinenclator Helic. 



viv., p, 183. Rawak, Aru Islands, Waigiou. 

 1883. Helix {Sulcobasis) concisa, Fer. Tapparone-Canefri, Ann. 



Mus. Civ. Storia Nat. Geneva, vol. xix, pp. 165-6. Waigiou 



(Wallace), Aru Islands (Pfeiffer), Rawak Island (Freycinet). 

 1886. Sulcobasis concisa, Fer. Kobelt, Kaclirichtsblatt Deutsch. 



Malak. Ges., Jahrgang xviii, pp. 174, 179. Aru Islands, 



Waigiou. 

 1886. Helix {Sulcobasis) concisa, Fer. Tapparoue-Canefri, op. cit., 



vol. iv, p. 197. 



1889. Helix {L'hloritis) concisa, Fer. Paetel, Cat. Concliylien- 



Samiulung, 4. Neubearbeituug, 2. Abtheil., j). 1 19. Waigiou 

 (Wallace^ 



1890. Helix {Chloritis \_Sulcohasis']) concisa, Fer. Pilsbry, Man. 



Conch., ser. ii, vol. vi, p. 262, pi. xlix, fig. 15. Waigiou, 



Aru Islands, Rawak Island. 

 1894. Chloritis {Sulcobasis) concisa, Fer. Pilsbiy, op. cit., vol. ix, 



p. 120. 

 1903. Chluritis {Sulcobasis) concisa, Fer. Gude, Journ. Malac, 



vol. X, p. 96. Waigiou, Rawak. 

 1906. Chloritis {Sulcobasis) coticisa,Fev. partim. Gude, Proc. Malac. 



Soc, vol. vii, p. 113. Aru Islands. 

 This sub-species is characterized as follows : Differt ab aliis sub- 

 speciebus Stilc. conciscB spira subplana, anfractibus supra subplanis, 

 sutura prof unde impressa separatis, et sajpius sulcis obliquis distinctis. 

 In this form special importance has hitherto been attached to the 

 furrows of the shell, a most unimportant and variable character. 

 These furrows are found more or less in all specimens of all the 

 sub-species in question. A shell of concisa concisa, the same which 

 Pfeiffer described in 1848, belonging to the collection von deni Busch, 



