84 Mull. 
MOLLUSC A. 
Unionidji. » 
JJnio requieni (Mich.) and other species in warm water of 29-30^ 0., 
at Barbotan, in France ; Dupuy, J. de Conch, xxv. pp. 18 & 23. 
Unio nipponends^ sp. n., Martens, SB. nat. Fr, 1877, p. 119, Mukosima, 
Japan. 
Unio languilati^ var. n. aligeruSy compressus^ and caveatuSy spp. nn., 
Heude, Conch, fluv. de Nanking, fasc. iii. pis. xvii. & xxiv., Prov. Nan- 
king and (the third) Honan, China. 
Unio footii, sp. n., W. Theobald, J. A. S. B. xlv. pt. 2, p. 187, pi. xiv. 
fig. 9, Gutparba, River Kistna. 
Unio marginalis (Lam.), var. n. saoadiensis, Sawady, in the river 
Thengleng, U. fragilis, sp. n., an = foliaceus (Gould) ?, Yaylaymaw, and 
andersoniana[^-us']f sp. n., Myadoung, Nevill, J. A. S. B. xlvi. pt. 2, 
pp. 37-40. 
J. Lewis enumerates a number of nearly allied species of Unio, some 
living in the Ohio, others in the Alabama, and calls them equivalent 
species ; further, he enumerates 19 species belonging to the group of 
Unio parvus (Barnes) ; P. Ac Philad. 1877, pp. 24-36. 
Pseudodon secundus, sp. n., Heude, Conch, fluv. de Nanking, fasc. iii. 
pi. xviii. No. 38, Hoai river, Prov. Nanking. 
Cristaria spatiosa (Clessin), very near herculea (Midd.), Japanese 
specimens ; Martens, SB. nat. Fr. 1877, p. 118. 
Anodonta piscinalis (Nihs.). On a pearl within it, containing a small 
insect ; Sordelli, Bull. mal. v. [1872] p. 12, pi. i. figs. 12 & 13. 
Anodonta lauta, sp. n.. Martens, SB. nat. Fr. 1877, p. 117, Yeddo. 
Anodon securiformis, arcceformis [arcif-'\, nigricans, Jluminea, lucida, 
WtJMZam, spp. nn., Heude, Conch, fluv. de Nanking, fasc. iii. pis. xviii.-xx., 
Prov. Nanking and Honan, China. 
Mycetopus [? ?] carinatus, oleivorus, recognitus, rivularis, and similis, 
spp. nn., id. 1. c. pis. xxi.-xxiii.. Middle China. 
Dreyssenid^e. 
Dreyssena hrardi (Brogn.), var. n. caspia, distinct from caspia (Eichw.) 
and rostriformis (Desh.), all three living in the Caspian Sea j Grimm, 
Kasp. more fauna, ii. pp. 74, 72, & 71, the first pi. viii. fig. 16. 
MYTILID.3S. 
Mytilus edulis. A, Sabatier has published the first half of a full 
anatomy of this species, treating the intestinal, circulatory, and respi- 
ratory organs ; Ann. Sci. Nat. v. Nos. 1 & 2, 132 pp., 9 pis. Some points 
of more general bearing are already mentioned above. 
T. Tullberg has examined the byssal glands in Mytilus edulis (L.), and 
comes to results somewhat different from those of A. Muller in 1836. 
There are many glands, partly of whitish, partly of greenish colour 
within the foot, and chiefly in the walls of the byssal excavation ; these 
secrete the substance of the byssus, which is moulded in the shelves 
