201 



et postice fortioribus, etlirulis acutis concentricis, plūs miniMve 

 distantibus, eleganter ornata ; lunula vixstria majore definita ; 

 intus, dent. card. iii. radiantibus, ąuorum valva in altera ii. 

 altera i. bifidi sunt ; sinu pallii maximo, elongato, lateribus sub- 

 erectis, parum divergentibus, apice cicatr. ant. contiguo, sub- 

 rotundato ; margine vix crenulato. 



Long. -94, lat. 1-13, alt. -38. 



Hab. Panama ; legit Col. Jeivett. Mus. Goiild. 



Of this extremely degant species, the two specimens sent were 

 broken in transit. It is recognized at once by its fragility and delicate 

 sculpture. 



18. Trigona tantilla, Gould. 



Venus tantilla, Gould, p. 33. pi. 15. f. 10. 

 Hab. Sta Barbara {Jeicett). Mus. Gould. 



19. Cyclina subqtjadrata, Hanl. — B.M.Maz.Cat.p.66.no.91. 

 Arthemis saccata, Gould, p. 23. pi. 15. f. 2. 



20. Cardium luteolabrum, Gould, Mex. &c. p. 28. 

 C. xanthoeheilum, Gould, MS. Cat. 



21. Cardium cruentatum, Gould, M. S. 



" C. t. parva, tenui, transversim rotundato-ovata, ventricosa, in- 

 cequilaterali ; levi et nitida ; straminea, et ad aream dorsalem 

 posticam rufo tincta, lineis radiantibus crebris vix insculpta ; 

 umbonibus elevatis, obtūsis ; extremitatibus rotundatis ; intus 

 citrina, rufo-sanguineo conspersa ; margine concinne crenulato. 



"Long. -62, alt. -62, lat. -42. 



" Compares with C. Elenense and C. Mortoni." — Gould, MS. 



Hab. San Pedro ; legit W. P. Blake. 



[Probably=C. substriatum, Gonr. J. A. N. S. p. 228. pi. 17. f. 2.] 



22. LuciNA Artemidis, n. s. 



L. t. alba, solidiore, subrotundata, subplanata ; marginibus ven- 

 trali antice producto, postico subplanata, dorsali subangulato ; 

 umbonibus appressis, haud prominentibus ; superficie suleis con- 

 centricis crebris ornata ; lunula parva, vix excavata, in valva 

 altera omnino šita, altera margine incurvata ; intus, dent. 

 card. ii.— ii. divergentibus, lat. ant. i. -ii. prominentibus, distan- 

 tibus, post. i. -ii, valde distaiitibus, parvis ; cicatr. muse. ant. 

 elongatis, serratis, post. parvis ; linea pallii a margine haud 

 distante. 



Long. -75, lat. -84, alt. -57. 



Hab. ? Acapulco, teste Gould ; Mus. suo, sp. nu. 



Found in company with Tellina ricina, C. B. Ad. Has the 

 characteiistic shape and interior of Lucina, with the sculpture of 

 Dosinia. 



