37 ° 
INDEX. 
Tanganyika, modern lake deposit near, 81. 
,, molluscs, conchological char- 
acters of, 333. 
,, ,, of, 19, 125, 217-265. 
,, , neothauma, affinities of, in, 
128. 
,, ,, , varieties of, 149. 
,, , normal fresh-water molluscs 
of, 217. 
,, , number of species in, 133, 
146, 154. 
,, , outflow of, into the Congo, 90. 
,, , paramelania of, 150. 
,, , plateau the, 80. 
,, polyzoa, 1 41. 
,, polyzoan, description of, 295. 
,, , the site of a former sea, 220. 
,, , sponges of, description of, 309, 
310,315,318, 321,322, 323. 
,, unio, the genus, 217. 
,, , upthrust on, 49, 81. 
„ valley, 46, 48, 49, 83. 
,, , volcanoes north of Kivu, effect 
of, on, 90. 
,, , wet and dry seasons on, 301. 
Telmatochromis annectens, description of, 
194. 
,, vittatus, ,, 194. 
Tilapia aurata, 124. 
,, boops, description of, 204. 
,, burtoni, 128, 135. 
,, ,, , description of, 198. 
,, callipterus, 124. 
,, dardennii, description of, 200. 
,, grandoculis, description of, 206. 
,, horei, description of, 198. 
,, johnstoni, 124. 
,, kirkii, 124. 
,, labiata, description of, 202. 
,, lateristriga, 124. 
,, lethrinus, 124. 
,, microlepis, description of, 206. 
,, mossambica, 124. 
,, natalensis, 128. 
,, nilotica, 128, 130, 132. 
,, ,, , description of, 198. 
,, nuchisquamulata, 130. 
Tilapia obliquidens, 130. 
,, pleurotrenia, description of, 202 
,, polyacanthus, 128. 
,, rendalli, 124. 
,, rubropunctata, description of, 198. 
,, sauvagii, 130. 
,, shirana, 124. 
,, squamipinnis, 124. 
,, subocularis, 124. 
,, tetrastigma, 124. 
,, trematocephala, description of, 
204. 
,, williamsi, 124. 
,, zillii, 132. 
Trematocara marginatum, description of, 
142. 
,, unimaculatum, ,, 192. 
Triassic remains of fish, 62, 69. 
Trochus, affinities of, 272. 
Tropheus moorii, description of, 196. 
Tympanotomus, affinities of, 237, 240, 342. 
Ty phobia horei, 218. 
,, ,, , affinities of, 223, 226, 227, 
239, 241, 243, 244, 266, 
270, 271. 
,, ,, , conchological characters 
of, 223. 
,, ,, , description of, 223. 
,, ,, , nerves of, 225. 
,, ,, , stomach of, 225. 
,, ,, , varieties of in Tanganyika, 
150. 
UNIO ACUMINATUS, 129. 
,, bakeri, 129. 
,, borellii, 125. 
,, genus of Tanganyika, 217. 
,, hypsiprymnus, 125. 
,, kirkii, 125. 
,, lechaptoisi, 125. 
,, liederi, 125. 
,, mossambicensis, 125. 
,, multicolor, 131. 
,, ngesianus, 130. 
,, nyassaensis, 125. 
,, stuhlmannii, 130. 
Universal fresh-water faunas, 14- 
