INDEX. 
Jicfcroiccs io jiijiircs and cxphotatory text arc giuen in Eomaii numerals, 
llcfcrcnccs to the text only are in Italic numerals. 
Al)(loniinal gaii<;lion page?, 149, 230. 
Abnormal growth 121, cause of 131. 
Abrasion 73. 
Absorbent canals 300. 
Absorption of columella 30. 
Abyssal depths, effects 77, 70, So. 
Acantlioglossa 266, 267. 
Acrecbolic protrusion 1S8. 
Acrembolic retraction 188. 
Aculeate teeth 266. 
.Vdductor muscles, 1S3, 345, anterior 
IS.', 346. 347, in .1 nndonta 1S3, classi- 
lication by 10, 345, ]>osterior 1S3, 
346, 347, structure 346. 
Admedian radular area 360. 
.\dmedian teeth (see lateral teeth). 
-Estivation 30S. 
-Vlferent, nerves 212, ]mlnionary veins 
l.")6, tactile nerves 244. 
Age, inlluence on colour 32S, on heart 
])ulsation 207. 
-Vgnatlia 350. 
Agrinlhnax agrr.stis, buccal section 
269, embryo 381, nepbridial section 
33.7, respiratory and anal orilices 283, 
sarcobclum exserted 36.), semper’s 
organ 243, vor.acity 3 SO. 
Ayrioliinax Iwri.',’, proterogyny 351. 
-Mate bivalves 41. 
-\lbinism SO, pi. ii., f. 5, c.auses.W. 
-\lbumen gland ,3.')9, Helix ((sjicrsr( 160, 
161. 
-Miment.ary system 13S, 24.5, of arche- 
type 143 , Anodonta ryynca 171, 172, 
Arion hortensis 246, Dreissensia 
/lolyinorpha 277, lIcH.c aspersa 153, 
1.53, 154, 245, lleli.v la/iicida 284, 
Umax /fariis '2H4, I., maxim ns2Si7i, 
Limniva perryra 274, L. staynrdis 
279, Suceinca clegans 282, Tcstaeclla 
halintidea 246, 28.5. 
Altitude, elfect of <9.J. 
Amalia carinata 50. 
A mid id gagates, cephalic retractors 342. 
Amalia soteerhyi, body torsion 282, 
facial grooves 186, rival spermato- 
pbores 374, spermatopboie in epi- 
[iballus 376, sperinatophore in sper- 
matheca 376. 
Amitosis 378. 
Ama'bocyte.sof //effx ponmtia 139,296, 
340 . 
Amorous preludes in g.astropods ,372. 
Amphipeplca glutinosa 202, pallial 
extension 201, 202, periodicity 59/. 
Amulets 433. 
Ancylus fluviatilis, form 25, apex of 
shell 115, speed 5.^.9. 
Animal, external features 134, 
Helix 144, of pelecypoda 163, 164, 
185, literature 3S3. 
Anisopleura 5, torsion 5, 6, 109, 205, 
206. 
Anodonta, ad<luctors 1S3, 345, calcic 
cells 178, cephalic region I 64 , cepha- 
lic eyes 171, clear water, effects on 
colouring 87, embryo .346, gill struc- 
ture 177 , glandular system 178, 
lacunar tissue 1,39, levators 183, 
mu.scular system ISO, 181, nephri- 
dial section 33.3, orbicular muscles 
181, otocyst and nerve 241, pallial 
line 181, pallial region I 64 , pedal 
region 164, 166, posterior pedal 
muscles 183. 
Anodonta anatina ■12, abate 41, axis of 
cerebral ganglion cells 210, cerebral 
ganglion cells 210, 217, chitinous 
frame of ctenidium 137, embryonal 
sculpture 72, external features 164, 
genital lobule 184, ligament 48, 
liver lobule 173, liver elements 173, 
* section showing peilal muscles, etc., 
182, visceral ganglion cells 210, 
young 41. 
v. complanata 44, 52, 72, v. 
radiata 43, 50. 
Anodonta cygnea, .36, alimentary tract 
172, arrangement of organs 166, and 
section 177, arterial system 174, 
.arteries of p.alps 191, cephalic eyes 
171, cerebral ganglia 168, chemical 
structure of shell 38, cireulatory 
.system, section 175, circulation 176, 
continuity of palps and gills 191, 
crystalline style 173, 278, effect of 
l)lethora of lime 70, lliiche tricuspi<le 
173, genital ducts, section showing 
18.3, gill cavities 177, gill structure 
177, glochidial byssus 322, gusta- 
tory organs 171, heart 173, section of 
291, injuries, effect of 103, keber’s 
valvule 176, 295, labial palps 171, 
190, liver 173, lophophoral line 301, 
