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MYTILACEA. 175
ASTARTIDJE.
Astarte lutea, sp. n., Perkins, P. Bost. Soc. xii. p. 139, New Haven.
Crassatella (Gouldia) modesta, H. Adams, distinct from AstaHe excurrens,
Sc. Wood, against the suggestion of Gw. Jeffreys. Sc. Wood, Ann. N. H.
(4) vi. p. 423. Jeffreys admits the distinctness, and thinks that Gouldia is
merely a synonym of Crassatella, ibid. pp. 458,459.
Crassatella subquadrata and crebrilirata, spp. nn., Agulhas Bank, and/eweolata,
sp. n., China seas. Sowerby, P. Z. S. 1870, p. 249.
Cardita cuvieri, Brod. 1832, = michelini, Val. 1846, and C. crassa, Gray,
described by Verrill, Am. J. Sc. xix. p. 225, La Paz, California.
UNIONIDiE.
The fourth edition of I. LEA'S synopsis of the Unionidse contains,
after a previous discussion on the best systematic arrangement
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 224
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. 257-265, pi. 1; see Zool.
Rec. vi. p. 136), adds several particulars concerning the development
of the eggs of the mollusk itself, and some other animals
infesting it (as Alcyonella). Zool. Gart. 1870, pp. 169-172.
Dr. SCHOTT confirms these, ibid. pp. 237, 238. He also describes
the life and development, the parasites and other enemies &c.
of Unionidae in a popular manner inBer. senckenb. nat. Gesellsch.
1869-70, pp. 34-64.
Unio (Retz). An account of Lor. Spengler's monograph (1792) is given
by Morch, Mal. Bl. xvii. pp. 107,108.
Unio tumidus var. heckingi, n., batavus var. incurvatus and var. belgicus,
nn., Colbeau, Ann. mal. Belg. iii. (1868) p. 106, pi 4. figs. 1-3, Belgium.
Unio rniilleri, Rossm., probably only a variety of U. tumidus, Retz, again
observed near Kiel by E. Friedel, Ma! Bl. xvii. pp. 46, 47.
Unio requienii, Mich., =glaucinus, Ziegl, elongatulus, Megerle, and pictorum
(L.), Rossm., in the lake of Garda, where exists also a smaller variety
of Unio or Margaritana bonellii (Fer.); U. gurkensis, Ziegl, and ovalis
(Megerle) enumerated as distinct species, but may be regarded also as varieties,
the first of requienii, the latter of pictorum, or perhaps also of requienii.
Betta, Moll. prov. Veron. pp. 140-145.
Unio prcechistus, sp. n., Bourguignat, Ann. Mal. p. 37, mouths of the
Danube.
Monocondylcea (Plagiodon) semisulcata, sp. n., H, Adams, P. Z. S. 1870,
p. 376, pi 27. fig. 3, Eastern Peru.