Jrom the Sea of Japan. "225 
antico breviore rotundato, postico longiore producto subattenuato ; 
alba; macula rufa elongata ad umbones ornata; superficie valva- 
rum concentrice sulcata, sulcis regularibus confertis, area laterali 
postica lineis vix elevatis radiantibus instructa. ae 
Hab. Tsu-Sima; 17 fathoms. 
The conspicuous red elongate mark extending from the beaks 
on the anterior side of the valves will always serve to distinguish 
this species. 
Genus Tetuimya, Brown. 
Tellimya japonica, A. Adams. 
7. testa transversim oblonga, ineequilaterali, umbonibus acutis pres 
minulis, latere antico breviore subtruncato, postico longiore rotun- 
dato, superficie valyarum tenuissime concentrice striata, striis con- 
fertis; alba, tenui, vix opaca. 
Hab. Mino-Sima; 63 fathoms. 
This species is more transversely oblong than 7. bidentata 
from the seas of Europe, and the anterior side is much shorter. 
Genus Myrrna, Turton. 
1. Myrtea gibba, A. Adams. 
M. testa suborbiculari, solida, opaca, sordide alba, tumida, radiatim 
costata, costis subgranulosis distantibus, interstitiis valde punc- 
tatis ; area laterali antica costis validioribus; margine ventrali 
sinuoso. 
Hab. Tsu-Sima; 25 fathoms. 
Very gibbose, with the interstices between the ribs coarsely 
punctate. 
2. Myrtea reticulata, A. Adams. 
M. testa orbiculari, gibbosa, solida, alba, opaca, costellis radiantibus 
subgranulosis et liris elevatis concentricis valde reticulata, costellis 
ad latera validioribus, in medio interdum subobsoletis. 
Hab. Port Hamilton ; 7 fathoms: Mino-Sima; 63 fathoms. 
Gibbose and strongly reticulate, with granular radiating rib- 
lets and concentric ridges. 
3. Myrtea fimbriatula, A. Adams. 
M. testa suborbiculari, gibbosula, tenui, albida, antice valde sinuata, 
postice flexuosa, radiatim plicata, concentrice lamellata, lamellis 
tenuibus subdistantibus fimbriatulis, plicis ad latera validio- 
ribus. 
Hab. Tabu-Sima; 25 fathoms. 
The chief character consists in the thin, wide-apart, fimbriate 
lamella. 
