325 



entibus) insculpta; anfr. 5 ventricosis : apertura angusta ; labro 

 admodum incrassato intus denticulate, fere ad sinum siphonalem 

 interrupto ; plicis acutis, transversis ; callo modico, baud appresso ; 

 dente parietali modico. Axis 5 millim. ; diam. 3.5 millim. In- 

 habits Port Jackson, N. S. W. W. S. 



The numerous striae, denticulate labium, and scantiness of 

 callus about the siphonal notch, mark this species. 



RiNGicuLA DOLiARis. T. majuscula, tenuis, ventricosa, ovata, 

 albida; spira acuminata, anfr. 4 rotundatis, sulcis transversis 

 remotis insculptis, ultimo amplo ; sutura profunda : apertura 

 magna, labio angusto, baud incrassato, plicis columellas tenuibus, 

 acutis, plica parietali parva, tenui ; callo siphonali modico. Axis 5 

 millim. ; diam. 3-j- millim. Inhabits Hakodadi Bay, 6 fathoms, 

 sandy mud. W. S. 



Peculiar from its thin lip and general want of callus. 



RmGicuLA ARCTATA. T. solida, ovata, acuminata, alba ; 

 spirae anfr. 4-|- convexis, ultimo striis volventibus (10-12) in- 

 sculpto ; sutura profunda : apertura auriculata, labro incrassato, 

 intus tumido ; plicis ad columellam conspicuis ; dente parietali 

 robusto, usque ad angulum posticum aperturse protracto ; callo 

 labiali lato, sinum siphonalem transeunte. Axis 4; diam. 3 

 millim. Inhabits Hong Kong Harbor. W. S. 



Allied to R. caron and propinqua^ but the sculptured lines are 

 much more crowded. 



BucciNTJM Stimpsoni. T. magna, solidula, elongata, fusi- 

 formi-turrita, cinerea vel dilute ferruginea, epidermide calcarea 

 caduca incrustata, lineis tenuibus cincta ; anfr. 6 ad 8+ pyram- 

 idatis, pentagonalibus, ultimo antice excavato, costa cincto ubi 

 undae terminantur. Apertura dimidiam longitudinis testae ad- 

 aequans, anguste lunata; labro simplici; columella arcuata, cal- 

 losa ; fauce dilute castanea vel Uvida. Long. 100 ; diam. 45 

 mill. Habitat Arikamcheche Island, Behring's Straits. W. S. 

 Dredged in Arctic Ocean. Capt. Rodgers. 



A quite remarkable species, allied to B. undatum, but at once 

 distinguished by its elongated form, and its pyramidal, pentago- 

 nal whorls with concave sides. 



