HELIX. 147 
not clearly defined= Doridium, Meckel, 1808, and this name generally preferred, also 
by P. Fischer in his ‘Manual’; Aglaia, Eschscholtz, 1825 (Siphonophora), has been 
changed by the author himself in his chief publication, ‘System der Acalephen,’ 1829, 
into Aglaisma, and this form of the name has been adopted by all later authors, even 
by Hackel, in vol. xxviii. of the ‘Challenger’ Report, 1888 ; Aglaia, Swains., 1827 
(Aves), is synonymous with Calliste, Boie, 1826, older by one year. Aglaia, Loureiro, 
1780 (Fam. Meliacez), is, however, generally adopted by botanists. Therefore, I think 
it more safe to adopt Adams’s name Lysinoé. Odontura has been proposed by Fischer 
and Crosse for H. eximia and H. ghiesbreghti, the latter being the only, and therefore 
the typical, species of Aglaia in Albers’s first edition, and the first species of Adams’s 
Lysinoé; they are therefore wrong in adopting Aglaia for another section of Helix, 
however closely allied, in Journ. de Conch. xxi. p. 277; further, Odontura is pre- 
occupied by Rambur, 1838, in Orthoptera (Locustide). 
Back of the foot provided with a knobbed keel, the granula of the median line being 
conspicuously larger than the rest. Jaw with distinct ribs. ‘Iwo dart-sacs, and, con- 
sequently, two darts present. Three simple folliculi mucosi. Flagellum very long, 
simple. 
Shell globose or depressed-globose, beset with granula, and some species also with 
hairs; brownish or yellowish, with dark spiral bands; umbilicus open or partly 
covered by the columellar margin; margins of the aperture more or less reflexed, 
without plaits. | 
Size rather large. 
20. Helix humboldtiana. (Tab. VII. figg. 20, 21, 22, 22 a.) 
a. typica: elate globosa, subcastanea, fasciis nigro-fuscis: diam. 35, alt. 38 (ex icone) millim. 
Helix humboldtiana, Férussac, Hist. Nat. Moll. Terr. t. 17 4. figg. 16, 17°; Deshayes, ibid. i. p. 273 
(1850-51) *. 
Hab. Mexico 1?: nearer locality not indicated. 
b. hegewischi: globosa, minor ; pallida, strigis albis, fasciis distinctis: diam. 26—28, alt. 24-26 millim. 
Helix humboldtiana (Valenciennes), Pfr. Symb. Hist. Helic. 1. p. 37 (1841) °; in Martini & Chem- 
nitz, Syst. Conch.-Cab. ed. 2, Heliwv, i. p. 152. no. 590, t. 92. fig. 18 ‘; Monogr. Helic. 
Vivent. i. p. 196°; Philippi, Abbild. neuer Conch. ii. p. 3 (29), t. 6. fig. 7°; Reeve, Conch. 
Teon. vii., Helix, t. 102. fig. 566°. 
Helix (Pomatia) humboldtiana (Val.), Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 240, t. 11. 
figg. 1, la’. 
Pomatia humboldtiana (Val.), Binney, Bull. Mus. Comp. Zool. Harv. Coll. v. p. 336, t. 2. figg. J, K 
(anatomy) (1879) °. 
Hab. N. Mexico: Ciudad in Durango (forrer). 
CentraL Mexico: Desierto, Venta de Guajimilpan, route Mexico to Toluca (Hege- 
wisch 2°) ; interior of Mexico’. 
19* 
