MYTIIACEA. 
175 
AstaIitida?/ 
Astarte lutea, sp. n., Perkins, P. Best. Soc. xli. p. 139, New Haven. 
Crassatella ( Gouldia) modesta^ H. Adams, distinct from Astarte eXcurrenSj 
Sc. Wood, against the suggestion of Gw. Jeffreys. Sc. Wood, Ann. N. H. 
(4) vi. p. 423. Jeffreys admits the distinctness, and thinks that Goiddia is 
merely a synonym of Crassatella, ibid. pp. 458, 469. 
Crassatella suhquadrata and crehrilirata, spp. nn., Agulhas Bank, ahd/o?;eo- 
lata, sp. n., China seas. Sowerhy, P. Z. S. 1870, p. 249. 
Cardita cuvieri, Brod. 1832, = mfcAe//m‘, Val. 1846, and C. crassa, Gray, 
described by Verrill, Am. .1. Sc. xix. p. 226, La Paz, California. 
Unionida?. 
The fourth edition of I. Lea’s synopsis of the Unionidae con- 
tains, after a previous discussion on the best systematic arrange- 
ment of the genera and species, a list of all known species, with 
full synonymy and numerous annotations ; further, a table of 
geographical distribution, an index of all the names of species, 
with statement where they have been published, and an extended 
list of books and papers referring to the subject. The author 
admits 1069 known species, and gives besides a list of 334 
doubtful ones. 
Dr. F. C. Noll, who has made the curious observation that 
within living specimens of Unio and Anodonta the eggs of a 
Cyprinoid fish, Rhodeus amarus, are deposited and the young 
fishes developed (Zool. Gart. 1869, pp. 357-365, pi. 1; see Zool, 
llec. vi. p. 136), adds several particulars concerning the develop- 
ment of the eggs of the mollusk itself, and some other animals 
infesting it (as Alcyonella). Zool. Gart. 1870, pp. 169-173. 
Dr. Schott confirms these, ibid. pp. 337, 338. He also describes 
the life and development, the parasites and other enemies &c. 
ofUnionidse in a popular manner inBer. senckenb. nat.Gesellsch. 
1869-70, pp. 34-64. 
Unio (Retz). An account of I^or. Spenglor’s monograph (1792) is given 
by Morch, Mai. Bl. xvii. pp. 107, 108. 
Unio tumidus var. hcckinffi, n., hatavm var. incurmtus and var. helgicm^ 
nn., Colbeau, Ann. mal. Belg. iii. (1868) p. 106, pi. 4. figs. 1-3, Belgium. 
Unio miilhri, Rossm., probably only a variety of U. tumidus, Retz, again 
observed near Kiel by E. Friedel, Mal. Bl. xvii. pp. 46, 47. 
Unio requienii, 'MAQh..,=glaucinus, Ziegl., elongatulus, Megerle, and pfc- 
teyrum (L.), Rossm., in the lake of Garda, where exists also a smaller variety 
of Unio or Margaritana hmellii (F^r.) ; U. gurkensis, Ziegl., and ovalis 
(Megerle) enumerated as distinct species, but may be regarded also as varie- 
ties, the first of requienii, the latter of pictorum, or perhaps also of requienii. 
Betta., Moll. prov. Veron. pp. 140-146. 
Unio proechistus, sp. n., Bourguignat, Ann. Mal. p. 37, mouths of the 
Danube. 
Monocondylcea {Tlagiodort) semisuhata, sp. n., II. Adams, P. Z. S. 1870, 
p. 376, pi. 27. fig. 3, Eastern Peru. 
