GASTKOPO DA BIVA LY I A . 
Moll. 87 
figs. 3-0, shells, living animals, radula, and anatomy, the throo former at 
the mouth of the Yang-tse kiang on muddj’’ ground, the last at Shanghai 
on wet walls. 
Helicinidjj. 
Ilelicina hung erf or (liana, sp. n., Hong-kong and Macao, and hainan - 
ensis , sp. n., Hainan, Mollendorff, JB. mal. Ges. ix. pp. 182 & 183. The 
latter regarded as variety of the former ; id. 1. c. pp. 354 & 355. 
\Hydrocena~\ Realia sinensis and nivea, spp. an., Heude, l. c. pp. 8 & 9, 
pis. xii. fig. 7, xix. figs. 2 & 4, Middle China ; H. bachmanni (Gredl.), 
Mollendorff, JB. mal. Ges. ix. p. 355, China. 
Incert.® sedis. 
Thyrophorella, g. n., with an operculum moveably attached to the edge 
of the mouth. T. thomensis , sp. n., Greeff, Zool. Anz. 1882, p. 517, St. 
Thome Island, West Africa [perhaps the case of the larva of some insect. 
— Rec.] 
SOLENOCONCHJS. 
Dentalium agile (Sars) distinct from striolatum (Stimps.), Mediterra- 
nean, 86-1963 fath., Jeffreys, Ann. N. H. (5) x. p. 30. 
Dentalium capillosum , candiclum , subterfissum , and ensiculus (Jeffreys, 
1877), Atlantic, figured by Jeffreys, P. Z. S. 1882, pp. 658-660, pi. xlix. 
figs. 1-4 ; and note on D.flum , id. 1. c. p. 660. 
Dentalium ergasticum , sp. n., Fischer, J. de Conch, xxx. p. 275, Atlantic, 
1900 metres. 
Dentalium japonicum and weinkauffi (Dkr.) ; Dunker, MolL Jap. p. 153, 
pi. v. figs. 1 & 2, Japan. 
Siphondentalium teres , sp. n., Northern Atlantic, Jeffreys, P. Z. S. 1882, 
p. 661, pi. xlix. fig. 5. 
Siphondentalium vitreum and affine (G. O. Sars), Gulf of Maine and Nova 
Scotia; Verrill, Tr. Conn. Ac. v. pp. 557 & 558, pi. xlii. figs. 19 & 20. 
Cadulus amphora and gibbus, spp. nn., cylindraceus, gracilis , tumidosus 
(Jeffreys, 1877) figured, and note on C. olivi (Scacchi, 1835), Jeffreys, 
P. Z. S. 1882, pp. 663-666, pi. xlix. figs. 6-10. 
Cadulus pandionis (Verrill) and propinquus (G. O. Sars) var., New 
England, Verrill, l. c. p. 558, pi. lviii. figs. 30-32. 
BIYALYIA. 
Gills and byssal organ of the Bivalves [see in the General Subject, 
Respiration and Secretion]. 
Gastrocmnidj:. 
Gastrochcena grandis (Desh.) ; Dunker, Moll. Jap. p. 171, pl.xiv. figs. 10 
& 11, Japan. 
Clavagella ramosa, sp. n , id. 1. c. p. 172, pi. xvi. figs. 1 &2, Japan. 
