128 QASTIIUCU.ENA. 



4. GiGANTEA, f. 12, Deshayes. — Ovato-elontaga, utrinque 

 acuminata, dense striata ; hiatii maximo. — A large fisli- 

 shaped species rather pointed at the ends, with large ventral 

 hiatus and angular dorsal elevation. 



5. cuNEiFORMis, f. 1, Speuglev. — Antice attenuata, acumi- 

 nata, postice lata, ad terminum obtuse medio angulata ; area 

 dorsali elevata ; hiatu antico breviusculo. — Broadly wedge- 

 shaped, pointed sharply at the anterior and obtusely at the 

 posterior end. 



6. PHiLiPPiNENSis, f. \1, Deshayes. — G. cuneiforvii similis, 

 sed magis attenuata, umbonibus terminalibus depressis, area 

 antica oblique depressa. — Differing from G. cuneiformis in 

 having the umboes quite terminal and bent downwards. There 

 is an oblique depression behind the front hiatus. 



7. BREVis, f. 20, Soiverby. — G. cunei/ormi similis, sed 

 brevior, hiatu magno arcuato. — A shorter species than 

 G. cuneifoi'mis, with a shorter and more deeply arched 

 hiatus. 



8. INTERSECTA, f. 21, Deshayes. — Quam G. brevis brevior, 

 postice laminis concentricis conspicuis et minoribus intersti- 

 tialibus sculpta. — Like the preceding in form, but shorter^ 

 and neatly sculptured with concentric laminae and fine striae 

 between. 



9. RUGULOSA, f. 25, Sowerby. — Augusta, elongata, postice 

 concentrice distanter lirata. — Nearly of the same form as 

 G. diffi^cilis, with the posterior area concentrically ridged. 



10. IMPRESSA, f. 19, Deshayes. — Prsecedenti similis, sed 

 tenuiter postice striata, hiatu magno extenso, margine 

 dorsali elevato. — The characters of this shell are a little un- 

 certain, but it is shaped like the preceding, with the dorsal 

 margin more elevated, the hiatus larger, and the posterior 

 concentric striae less conspicuous. 



11. LAMELLOSA, f. 23, Deshayes. — Elongato-cuneiformis, 

 compressa, area postica concentrice laminis concentricis cre- 

 bre lirata. — Of a lengthened cuneiform depressed shape, with 

 the flattened posterior area finely concentrically laminated. 



12. OVATA, f. 9, Soiverby. — Ventricosissima, crassa, sub- 

 ovata, antice truncata, postice subacuminata, hiatu antico 



