Mr. A. Adams on Japanese Species of Corbulide. 365 
at Akasi, and a few which are intermediate between this 
and C. vitreum, and may be the latter with the point rubbed 
off.” 
5. Caecum? mamillatum. 
“One large broken specimen from Akasi cannot be distin- 
guished from the Crag fossil. The operculum has been forced 
inwards by detrital matter till it occupies the place of the plug 
which has perished.” 
1. Brochina glabriformis. 
“‘ A series of dead but nearly perfect specimens agree exactly 
with the Mazatlan shells. A few are almost identical with 
the British shells in plug, but are a shade larger. It is quite 
likely that the Pacific and Atlantic shells had a common 
origin.” 
2. Brochina (? var.) glabella. 
« B. testa ‘ B. glabre’ simillima, sed majore, septo parum convexo, 
subplanato, apice inconspicuo. 
“ Long. °085, lat. -02. 
“Hab. Akasi and Tanabe, Japan. (A. Adams.) 
“This may be only another variety of B. glabra on the 
contrary side. The specimens were few, of the size of B. gla- 
briformis, and with the nearly flat plug of C. gracile.” 
Fam. Corbulide. 
Genus CorBuLa, Brug. 
1. Corbula erythrodon, Lam. Hist. Nat. d. An. s. Vert. 
vol, vi. p. 138. 
Hab. Tatiyama, Yokohama. 
2. Corbula cuneata, Hds. Moll. Voy. Sulph. pl. 20. f. 6. 
Hab. Rifunsiri, Mososeki, Kuro-Sima. 
3. Corbula pallida, Hds., Rve. Conch. Icon. pl. 2. f. 11. 
Hab. Mososeki, 7 fathoms. 
4. Corbula venusta, Gld. Otia Conch. p. 164; Schr. Moll. 
Amur-Lande, pl. 25. f. 1-4. 
Hab. Gotto Islands, 48 fathoms ; Hakodadi Bay, 5 fathoms. 
5. Oorbula bifrons, A. Ad. Ann. & Mag. Nat. Hist. 1860. 
Hab. Seto-Uchi; Gotto; Mino-Sima, 63 fathoms. 
