728 UNIO 
terior of shell iridescent, pale pinkish, shading to bluish-white 
towards the ventral, anterior and posterior margins. 
Long. 21; lat. 37 mm.” (Preston). 
Type locality, Shiré River, at a point from 3 to 4 kilometres. 
to the south of Lake Nyassa. 
Unio shireensis Preston, Ann. Mag. Nat. Hist., (8), VI, 1910, 
De OL, spr me, fo i: 
UNIO SWINHOEI “Reeve” Sowerby. 
“Shell broad, oblong, inflated, thin, bluish-white within, 
smooth without, obscurely blackish-olive, anterior side rather 
rounded, ventral margin inflated, posterior side wide, dorsal 
margin elevated, dorso-lateral margin rather straight, umbones. 
depressed.”” (Sowerby). 
Type locality, Formosa. 
Unio swinhoe: Reeve MS., Sowersy, Conch. Icon., XVI, pl. - 
XLII, fig. 232, May, 1866—H. Apams, P. Z. S., 1866, p. 319. 
—Pinspry, Pr.) Ac. Nat. Sci. Phila:.1905;'p. 750: 
Margaron (Unio) swinhoei Lea, Syn., 1870, p. 45. 
Cristaria swinhoei (part), SIMPSON, Syn., 1900, p. 586. 
“This species was published independently by Sowerby and 
Henry Adams. ‘The later author presented his paper to the 
Zoological Society at the meeting of May 22, 1866; and since: 
a colored plate had to be prepared, it could not well have been 
published for some months later. The descriptions, so far as 
they go, agree. Sowerby’s figure measures, length 65, alt. 
40 mm.; and Adams gives the size as, length 60, alt. 39, diam. 
22mm. Sowerby gives the false locality “Camboja’’—a region 
where Swinhoe never collected: but then the monograph of 
Unio in the Tconica is famous for false localities. 
Mr. Simpson, in his Synopsis of the Naiades, 1900, p. 586, 
has quoted this species in the synonymy of “Cristaria szwin- 
hoei H. Ad.,” which is a totally different species. It may be- 
long to Simpson’s genus Lamellidens.’ (Pilsbry). 
UNIO PURPURIATUS Savy. 
“Transversely oval, slightly oblong, in some specimens with 
a littlé tendency towards ovate; dirty vellowish or fuscous, ob- 
scurely radiate with blackish-green; beaks in front of the 
