MOLLUSCA. 
561 
dextral, others sinistral, pi. 11. figs. 2 and 6, including as Tarieties mar- 
tini (Pfr.) and mackensiana (Soideyet), Malacca, Singapore, Sumatra, 
and Borneo ; nasuta (Metcalfe), Borneo ; albersi (Martens) —janm (Pfr., 
Beeve), Malacca; hugonis (Pfr.) 5 ^'egalis (Bens.), Borneo; 
(Chemn.), pi. 11. fig. 4, Borneo ; clypem (Mouss.), Java ; striata (Gray) 
t=naninoides (B&nB.')—isabella (Hombron and Jacqu.), Singapore and 
Pulo Piuang; N. rugata (Martens) of Reeve and others, not 
of Lamarck, pi. 10. fig. 3, Southern Celebes. 
h, Semirugulosie : N. densa (Adams), including as varieties schumache- 
riana (Pfr.), corrosa (Mouss.), and atrofusca (Albers), pi. 10. figs. 1 and 
1 5, Borneo, very nearly allied to cymatium (Bens.), cheoalieri (Sou- 
leyet), and some others. 
i. Solidao : humphreysiana (Lea), including gemina (Busch), with several 
varieties, pi. 10. figs. 2, 2 5, and 4, Malacca, Singapore, and Java ; obli- 
quata (Reeve), Sumatra; monozonalis (Lam.), locality not ascertained; 
virensj sp. n.. Martens, p. 2^7 =i?tumens of Pfeiffer and Reeve, not Desh., 
Sumatra ; sumatrensis, sp. n., Mousson collect.. Martens, p. 237. Here 
may be inserted the Siamese N. distincta (Pfr.), which comes very near 
to the larger lampas (Martyn) =pernobili8 (F<5r.), Martens, pp. 70, 71, 
k. Qigantem : N. borneensis (Pfr.), hrookei (Adams & Reeve), Martens, 
p. 238 ; further the Philippine omm (Val.), Martens, p. 88. 
Helix cclebcnsis (Pfr.). An emendated description is given by 
Sowerby, Joum. Conch, xv. pp. 111-115. It is to be regretted that no further 
particulars concerning its locality are given, and that it has not been compared 
with N. striata (Gray). Martens thinks that the locality given for it, 
Rhwo,” is not in Celebes, but the Dutch island Rhio, or Riouw, near Sin- 
gapore, and that it may possibly be only a variety oistriata. Preuss. Exped. 
p. 229. 
[^Nanina'] Helix gervaisU, sp. n., Dubreuil, Annal. Soc. Malac. Belg. ii, 
p. 49, pi. 3. Said to come from the Philippines, 83 millims. in diameter. 
{^Nanina ?] Helix bigoti, sp. n., Crosse, pp. 210 and 442, pi. 12. fig. 4. Allied 
to H [iV.] troglodytes j Island Mayotte, Eastern Africa. 
There is another group of Nanincey distinguished by its glossy shell, nar- 
row, rounded whorls, Macrochlamys (Bens.) = Orobia (Albers partly), which 
latter name was originally destined, and is to be left, for the Himalayan spe- 
cies of rather wax-like appearance. This subgenus is represented in Trans- 
gangetic India by iV. resplcmhns (Phil.) in Birma, resplendens^ var. obcsior^ 
Martens, p. 72, pi. 12. fig. 6, hainesi (Pfr.) and mitiuscula^ sp. n.. Martens, 
p. 73. fig. 10, in Siam, and by the following in the Indian archipelago : — cm- 
std (Pfr.), (Pfr-)? hyalina (Martens), fig. 6, aglaja (Pfr.), fig. 
13, all four in Borneo and the adjacent islands ; fuhocarnea (Martens), fig. 8, 
Northeni Celebes; convoluta (Desh.) and aiirea (Martens), fig. 12, both in 
Sumatra; ophiria (Pfr.), Malacca; infans (Pfr.), Borneo. Martens, l.c. pp. 
187-244. 
Macrochlamys minima and ilf. perlucida, spp. nn., II. Adams, Proc. Zool. 
Soc. 1867, p. 303, pi. 19. figs. 2 and 3, Mauritius. 
Nanina (? Rotida) conulus, sp. n., H. Adams, 1. c. p. 307, pi. 19. fig. 16 
(living animal), Ceylon, nearly allied to concavospira (Pfr.). 
\Zonites'] Helia corax (Parreiss), Pfeiffer, Novitat. Conch, pi. 78. figs. 1-6. 
Trochomorpha (Albers, as subgenus) is generically distinguished by the 
