LAMELLIBRANCHJA. 
187 
infulgens^ dooleyensis, gesneri, and invenustus, all North American, mostly 
from Georgia and South Carolina, Lea, Obsorv. Union, xiii. pp. 1-75, 
pis. i.-xxii. ; also in J. Ac. Philad. (2) viii. pp. 5-G(), same pis., most of 
them described also previously in P. Ac. Philad. 1809-1873. 
Unio ksihanus, sp. n., Mousson, JB. mal. Ges. i. p. 104, pi. v. fig. 6, 
Ued Ksib, Morocco [very near litoralis (Drap.)]. 
Unio ocgyptiacus (Per.), including as varieties niloticus (F(5r.^, and 
rugifer (Klist.), variable in form and colour of nacre ; Jickeli, Verh. 
L. 0. Ak. xxxvii. p. 271, pi. x. figs. 1-9 ; U. parreyRsi (Busch) = sennar- 
iensis (Kiist.), p. 273 ; U. teretiusculus (Philippi) = cailliaudi (Per), 
p. 270, pi. xi. figs. 1-3, all from the Nile. 
Unio aineus (Prankfort Mus.), sp. n., id. 1. c. p. 274, pi. ix. fig. 2, and 
U. demheoi (Rossm., Reeve), id. 1. c. p. 275, pi. ix. figs. 3 & 4, both from 
Dembea Lake, Abyssinia. 
Unio abyssinicus (Martens) ; id. 1. c. p. 278, pis. ix. fig. 5, x. fig. 10, 
Dembea Lake. 
Unio tigridiff (Pth\) = dignatus (Lea) = truncatus (Swains., 1829), 
Tigris, Martens, Vorderas. Conch, pp. 35 & 124, pi. vi. fig. 53 ; also 
Mousson, J. de Conch, xxii. p. 54. U. hueti (Bourg.) =. mussolianus 
(Parr.) = mossulensis (Lea), Mesopotamia; Martens, 1. c. p. 35, pi. vii. 
fig. 54. 
Unio pfisteri, rufescens, celtiformis, heudii (Bazin, MS.), ccqntatus, iiisci- 
cnlus, and langnilati, spp. nn., Heude, J. de Conch, xxii. pp. 112-116, 
Kiangsi and Kiangsu, China. U. sculptus, sp. n., Deshay es. Bull. N. 
Arch. Mus. ix. p. 9, pi. ii. fig. 3, Petscheli, China [scarcely different from 
douglasice (Gray) = murchisonianus (Lea)]. 
Unio moretonicus (Rv.) ; E. Smith, Moll. Voy. Ereb. & Terr. pi. iv. 
fig. 2, Australia. 
Unio jeffreysianus, p. 23, pi. vii. fig. 20, Australia ; macneili, p. 25, 
pi, viii. fig. 22, Nicaragua; stevensi, p. 22, pi. vii. fig. 19, Yuruari River, 
British Guiana : spp. nn. Lea, J. Ac. Philad. (2) viii. (Observ. Union. 
xiii. same figs.). 
Soft parts of Unio tappanianus, rowelli, and hydeianus, and embryonal 
shells of 14 North American species of Unio described ; id. 1. c. pp. 67-69 
pi. xxi. figs. 1-14. 
Unio variahilis (Maton), wheatleyanus (Lea), delodon (Lam.), and pata- 
goniciis (Orb.), the last with many varieties; Strobel, Malac. Argent, 
pp. 69-75, Argentine States. 
Mycetopus iridineus, sp. n., Heude, J. de Conch, xxii. p. 117, China. 
Mycetopus (?) riigatus (Sow.); E. Smith, 1. c. pi. iv. fig. 1, Victoria 
River, Australia. 
S 2 ni.fha cailliaudi (Martens), Nile, distinct from mhenn (Lam.), of W. 
Africa, liarlmanni (Martens), Sennaar, marnoi, sp. n., Bahr Seraf, 
and Icpsii^ sp. n.. Upper Egypt ; ■ Jickeli, Verh. L. C. Ak. xxxvii. 
pp. 259-265, pis. viii. figs. 1, 2, 3, ix. fig. 1. The colour of the nacre is 
variable. 
Mutela nilotica (Fdr.), angustata (Sow.), rostrata (^B,ng) — ccelestis 
(Lea), and plicata (Parreyss), = Mycetopus plicaius (Reeve), all from 
the Nile ; id. 1. c. pp. 266-270. 
