1, 2. PSORONAIAS KUXENSIS FRIERSON. 3. EPIPHRAGMOPHORA CALLISTODERMA PILS. & FERR. 4. UNIO TETRALASMUS SAY. 5, 6. ZACHRYSIA RAMSDENI PILS. 7. Z. EMARGINATA PFR.
[1]. Nautilus, vol. xx, pp. 58–60.
[2]. Nautilus, xxvi, pp. 51–55, 1912.
[3]. In a later work Ortmann classifies both ventricosa and cohongoronta as varieties of ovata Say.
[4]. The relations of mollusks to fish in Oneida Lake. By Frank Collins Baker. Technical Publication No. 4, New York State College of Forestry at Syracuse University. Pp. 366. Syracuse, N. Y., 1916. We are informed that it may be obtained free by those interested in the study of Mollusca by applying to the dean of the college, Dr. Hugh P. Baker.
[5]. Pupa griqualandica M. and P., 1893; the specimens used being from Pretoria.
[6]. Ann. Mag. N. H. (8), i, p. 76, pl. i, 1908.
[7]. In Nautilus, 28, 1914, p. 31, I have described the anatomy of “Pleurobema fassinans.” This is a mistake: the shells examined belong to Pleurobema all right, but are the form known as U. argenteus Lea, which belongs to the oviforme-group, and should be called: Pleurobema oviforme argenteum (Lea). These will be treated more fully elsewhere.