502 
ZOOLOGICAL LlTEilATUKE. 
A list of ten inequivalve UnionidcB, seven of which are from Central 
America, is given by Is. Lea, Proc. Ac. Nat. Sc. Philad. 1868, p. 95, 
Unio lawleyianusj sp. n,, Gentiluomo, Bullett. Malacol. Ital. i. pp. 54-58, 
pi. 4 . figs. 1-8, Lucca. — Unio niauritanicus, sp. n., Bourguignat, Moll, nouv, 
lit. fasc. X. p. 817, pi. 45. figs. 1-6, Oran, Algeria. 
Unio mgyptiacus (Cailliaud) found in the river Niger by Welwitach, Mo^ 
relet, Moll. Terr, et Fluv, Voy. Welwitsch, p, 97. 
Unio chinensis, sp. n.. Lea, I, c. p. 150. 
Unio douglasicB (Gray in Griffith, An. Kingd.)= U. murchisonianus (Lea). 
Mr. Lea claims priority for his name as it is contained in a paper read before 
the Am. Phil. Soc. in 1832 [but the volume of the Transactions in which it 
wdiS puhlished did not appear before 1837]. — U. suhtortus (Baird & Adams, 
\SQ7)=ztortuosus 1865), and perhaps=i5fc;i^smewsf6’ (Crosse & Debeaux, 
1863). Lea, I e. pp. 145, 146. 
Unio rectilinearis and digitiformiS) spp. nn., Sowerby in Beeve’s Conch. 
Ic. parts 268, 269, India. 
Unio murrayensis, MxuTay County, Georgia j fassinans [?], headwaters of 
Holston River, Virginia ; spams, Swamp Creek, North Georgia copei, head- 
waters of Holston River; oylindrellus, Tennessee, Georgia, and North Ala- 
bama; difficilis, Swamp Creek and Holston River; topeka'msis, Topeka, 
Kansas; lrazose?isis, Brazos River and Dallas Co., Texas; linceoumii, Texas; 
corvinus, Georgia and North Carolina ; corvuncidus, Flint River, Georgia ; 
planior, Tennessee and Virginia; vallatus, Alabama River; reftdgans, Okti- 
behha River, Miss. ; uhareensis, Uharee River, North Carolina ; spha>ricus, 
Pearl River, Miss., are species described as new by Lea, 1. c. pp. 143-145. — 
U. dorsatus, latus, heaverensis, nubilus, parvensis, hmnerosus, and genuinns, 
spp. nn.. Lea 1. c. pp. 160, 161, North Carolina. — U. nvicolus, sp. n., Conrad, 
ibid. p. 280, pi. 8. fig. 4, Florida. 
Unio ligammtinus, its variability. Lewis, Am. Journ. Conch, iv. p. 81. 
Unio niearaguensis, granadmsis, encarpus, and gahbianus, spp. nn., all from 
Lake Nicaragua, Lea, /. c. p. 95. — U. veracruzensis, sp. n.. Lea, /. c. p. 150, 
Vera Cruz. — U. ortonii and napo'ensis, spp. nn.. Lea, 1. c. pp. 161, 162, River 
Napo, Ecuador. 
Unio delodon (Lam.) = lacteolus (Lea) = wymani (Lea), U. midtistriatus 
(l^&Qi)=psammactinus (Broun), and U. rhyaccecus (Orb.). An account of 
these species from specimens collected at or near Porto Alegre by Dr. Ilensel, 
with references to some other allied species, is given by Martens, Mai. Blatt. 
XV. pp. 193-196. — U. bulloides (Led) — My a variabilis (Maton), ibid. p. 217, 
Unio prunoides, sp. n.. Lea, 1. c. p. 150, and U. sagrinatus, sp. n., Sowerby 
in Reeve’s Conch. Ic. no. and fig. 343. Localities of both unknown. 
Castalia pazi, sp. n., Hidalgo, Journ. Conch, xvi. p. 363, pi. 13, fig. 6, 
Imbabura in Ecuador. 
[^Barhala'] Dipsas discoidea (Lea, Anodonta tenuis (Gray in Griffith’s 
Animal Kingdom). Lea claims also here priority [see Unio douglasice]. 
Proc. Ac. Nat. Sc. 1868, p. 146. 
\Barbala plicataJ] Dr. Pfizmaier has collected and translated the passages 
in Chinese literature in which the pearl is mentioned. He comes to the 
conclusion that nearly always pearls from freshwater shells are referred to. 
Sitz. philos.-hist. Classe d. Akad. d. Wiss.Wien, Dec. 1867, pp. 617-651. 
Amdonta chaiziana (Rang) found by Dr. Welwitsch in the river Niger. 
Morelet, Moll. Terr, et Fluv. Voy. Welwitscli, p. 97. 
