238 
stissimis, divergentibus , majoribus apice anguste fissis; lateralibus subaequa- 
libus distantibus, minimis; in valva dextra duplicatis, antico crassiore, sinu 
palii brevi, triangulari, acuto; valvis intus pallide violaceis ad margines su- 
turatioribus. 
Long. 28, alt. 25, diam. 17 Mm. 
Hab. Peru (?). (Desh.). 
Nr. 63. Cyrena notabilis Deshayes. 
Cyrena notabilis Desh., 1854. Proc. Zool. London XXII. p. 21. 
— — Prime, 1865. Monogr. Corb. p. 28. 
— — — 1869 — 70. Catal Corb. Gen. Cyrena Nr. 50. 
T. ovato- transversa, subquadrilatera, depressiuscula, inaequilaterali, trans- 
versim tenue et irregulariter striata, albo-lutescente , sub epidermide tenui, 
fuscescente; latere antico brevi, obtuso; postico late truncato; superiore et 
inferiore rectis parallelis; umbonibus obliquis, integris, approximatis ; liga- 
mento elongato, cylindraceo, producto; valvis intus albo- lutescentibus, in 
latere postico macula intense violacea intus extusque notatis; cardine triden- 
tato, dentibus inaequalibus, obliquis, divaricatis; dente laterali antico parvo, 
conico, acuminato, postico obsoleto, remotissimo. 
Hab. Peru. (Desh.). 
Bemerkung: Prime hält die Muschel für eine zweifelhafte Species. 
Nr- 64. Cyrena obscura Prime. 
Cyrena obscura Prime, 1860. Proc. Zool. London p. 321. 
— — — 1869 — 70. Catal. Corb. Gen. Cyrnna Nr. 52. 
T. trigona, infiata, cordiformi, solidissima , alba, tumida, inaequilaterali, 
transversim striata, epidermide fuscata vestita; intus alba; umbonibus pro- 
minentibus, erosis ; cardine angusto ; dentibus cardinalibus tribus inaequalibus ; 
lateralibus magnis, antico majore acuto. 
Long. l 9 |i 0 , lat. l 2 |i 0 , diam. l 5 ji 0 . 
Hab. America merid. (Prime). 
Nr. 65. Cyrena palii da Deshayes- 
Cyrena pallida Desh., 1854. Proc. Zool. London XXII. p. 17. 
— — Prime, 1869 — 70. Catal. Corb. Gen. Cyrena Nr. 55. 
T. orbiculato - trigona, magna, solida, in medio eonvexa; inaequilaterali; 
antice posticeque declivi, rectilinea, extremitate posticali attenuata, brevi, 
