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Show 1870.] MR. H. ADAMS ON NEW SHELLS FROM THE RED SEA. 789 spira turrita, apice acuto, rubro; anfr. 9, convexiusculis, ultimo antice paulum attenuato ; apertura angusta, dimidiam longitudinem eequante; columella 4 plicata; labro acuto, sulculato. Long. 19, lat. 6 mill. CORBULA ERYTHRAEENSIS, H. Ad. (Plate XLVIII. fig. 2.) C. testa solida, ovato-triangulari, subeequilaterali, valde incequivalvi, concentrice conferte costata, costis postice obsoletis; umbonibus submedianis, tumidis; extremitate antica ovali; extremitate postica truncata; margine ventrali subarcuato. Long. 8|, alt. 7\, lat. 5| mill. EUCHARIS ANGULATA, H. Ad. (Plate XLVIII. fig. 3.) E. testa solida, triangulari-ovata, convexa, valde ineequilaterali, concentrice rugoso-plicata, alba; umbonibus parvis, ad sextan-tern anteriorem sitis; latere antico brevi, subtruncato; latere postico acuminato, superne convexo; margine ventrali arcuato ; declivitate umbonali valde carinata. Long. 13, alt. 9, lat. 8 mill. NEAERA (CARDIOMYA) PULCHELLA, H. Ad. (Plate XLVIII. fig. 4.) N. testa ovato-pyriformi, ventricosa, tenui, costis 16-18 radiantibus ornata, anterioribus confertis, posterioribus distantibus; umbonibus medianis, tumidis, approximatis; extremitate antica ovali, postica valde rostrata, rostro paulum reclivi; margine dorsali convexo ; margine ventrali arcuato. Long 10, alt. 6, lat. 6| mill. This species approaches in form to N. gouldiana, Hinds, but is more ventricose, and the dorsal margin is convex instead of being nearly straight as in that species. It differs from N. singaporensis, Hinds, in being more ovate, in the rostrum being less produced, and in the radiating ribs being stronger. TELLINA (PERONAEODERMA) SIMPLEX, H. Ad. (Plate XLVIII. fig. 5.) T. testa tenui, acuminato-ovali, compressa, subeequilaterali, sub lente radiatim minutissime striolata, albida; umbonibus submedianis, parvis, prominulis; latere antico ovali; latere postico subtriangulari; margine ventrali arcuato; flexura haud conspicua. Long. 14, alt. 10|, lat. 4\ mill. TELLINA (PERONAEA) PURA, H. Ad. (Plate XLVIII. fig. 6.) T. testa tenui, transversa, acuminato-ovata, ineequilaterali, concentrice striata, in medio striis obliquis decussata, albida; umbonibus parvis, vix prominulis; postmedianis; latere antico ovali; latere postico breviore, subtriangulari; margine ventrali arcuato; flexura conspicua. Long. 18, alt. 11, lat. 5 mill. |