750 PROCEEDINGS OF THE ACADEMY OF [Oct., 



Unio swinhoei ' Reeve,' Sowb. 



Unio swinhoei Rve. MS., Sowerby, Concli. Icon., XVI, pi. 42, fig. 232, May, 



1S66 (false locality "Camboja"). 

 Unio swinhoei H. Ad., P. Z. S., 1866, p. 319. 



Formosa (Swinhoe). 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. 22 mm. Sowerby gives the false locality 

 "Camboja" — a region where Swinhoe never collected; but then the 

 monograph of Unio in the Iconica 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 swinhoei H. Ad.," which is 

 a totally different species. It may belong to Simpson's genus Lamelli- 

 dens. 

 Nodularia douglasise taiwanica Pils., n. subsp. 



Shell oblong, narrow, inflated, rather solid, the dorsal and ventral 

 margins subparallel, the former slightly arcuate, anterior end rounded, 

 basal margin straightened in the middle, posterior end long, some- 

 what pointed. Beaks full, swollen, worn but showing traces of oblique 

 corrugation on the anterior and posterior slopes; situated at the anter- 

 ior two-sevenths of the length. Exterior covered with a blackish 

 cuticle, somewhat wrinkled along growth-lines. Interior white, iri- 

 descent posteriorly. Cardinal teeth compressed, strong, single in the 

 right, double in the left valve. Laterals moderately strong, rather 

 short. 



Length 49, alt. 25, diam. 19.7 mm. 



Formosa. Types No. 58,170, A. N. S. Phila., received from Andrew 

 Garrett. 



A mussel closely related to A^. dovglasia of China, but showing only 

 very weak traces of corrugation. 



Appendix. 



The following species, received since the preceding w^as in type, 

 adds a genus new to the Formosan fauna. 

 Blanfordia formosana n. sp. 



The shell is perforate, light brown, rather solid, turrite-conic, the 

 outlines of the spire straight, apex rather acute. Whorls 6|, quit 



