ODONTOONATHA AND AULACOGNATHA. 153 
Helve splendida (Drap.) and carthaginiensis (Rossra.) : for notes on their 
varr., cf. Hidalgo, 1. c. pp. 29 & G. 
For a discussion by the Recorder on the probably hereditary nature, 
literature, and relative frequenej'^ of occurrence of the different combinations 
of the dark bands in Helix nemoralis, hotdensis, silvatica, and austi'iaca, cf. 
Nadir, malak. Ges. iii. pp. 146-149 ; some rare varr. are also mentioned by 
Timmermans, Ann. mal. Belg. v. p. xx. 
Helix nemoralis, var. trochoides, and II. hortensis, var. trochoidea : Olessin, 
Nadir, malak. Ges. iii. p. 126, Bavaria. — H. nemoralis, varr. marginata and 
porrecta, H. hortensis, perforata'. Westerlimd, Exp. crit. pp. 39-41. 
Helix arhustorum, var. trochoidalis (Rofliaen), Olessin, 1. c. Bavaria; var. 
calcar ea and conoidea, Westerlund, 1. c. p. 42. 
Helix. Species from W. Asia : — 
Helix ccBsareana (Parr.) and spiriplana (Oliv.), engaddensis (Bourg.) and 
prasinata (Roth) : on the respective affinities of these spp. cf. Martens, Mal. 
Bl. xviii. pp. 66 & 67-69. H. krynickii (Andr.), from Samarcand, id. ibid. 
p. 66, pi. 1. figs. 4 & 6. H. bicallosa (Frivaldszky) occurs in the Altai, and its 
differences from hidens (Ohemii.) are pointed out, id. SB. nat. Fr. 1871, p. 49. 
Helix. Species from the E. Indies : — 
Helix rueppelli, arbusticola, davidi,plicatilis, inopinata, thibetica, alphonsi, sub- 
echinata, bianconii, and moupiniana, spp. nn.. Deshay es, N. Arch. Mus. 1871, 
Moupin, Thibet. 
Trachia (Albers) . Structure of its shell is nearer Campylcea 
and Fruticicola than Planispira j the jaw of T. delibrata (Bens.) 
has numerous ribs, and its genital organs are of very simjile 
form ; the systematic position of several spp. placed by various 
authors in this group is discussed ; and T. delibrata (Bens.) and 
gabata (Gould) are more particularly described : Stoliczka, 
J. A. S. B. xl. pp. 224-229, pi. 16. figs. 1-3. 
Plectopylis (Bens.). Its conchological and anatomical pecu- 
liarities pointed out ; oral parts small, intestines long, genital 
organs rather simple, female part with two appendages ; penis . 
external; oviviviparous ; jaw grooved, thin, with median pro- 
jection. P. achatina (Gray) and cyclaspis (Bens.) are more par- 
ticularly described. Id. ibid. pp. 217-223, pi. 15. figs. 1-6. 
Helix (Acavus) phoenix (Pfr.) : for jaw and lingual dentition, 
cf. Bland & Binney, Am. J. Conch, vii. p. 180. 
Helix leucophtholma (Pfr.), Pfeiffer, Nov. Conch, iv. p. 10, pi. 111. figs. 
8 & 9, Celebes. 
Helix collis (Mouss.), Amboyna, semirasa (Mouss.), Am I., embrechtiana 
(Mouss.), Moluccas, cryptopila (Mouss.), Rakata I., near Java, and squamulosa 
(Mouss.), Java, figured : id. ibid. pp. 36-40, pi. 117. figs. 1-3, 4-6, 7-9, 10-12, 
and 13-15. 
Helix thomsoni, indusiata, tiikanensis, and physalis, Tukan Besi I., Indian 
Archipelago, and H. kobeltiana, Ceram : spp. nn., Pfeifler, Mal. Bl. xviii. 
pp. 119-124. 
