238 On new Species of Mollusca. 



excavata ; margo dorsalis utrinque declivis ; latus anticus rotun- 

 datum, posticus biangulatum ; oardo normalis. 

 Diam. antero-post. 26, uinbono-marg. 16 mm. 



Hub. Manila. 



A white shell of ordinary form, closely sculptured, with 

 thin concentric lamellae and radiating strise. 



Gardita kiiensis, sp. n. (PI. III. fig. 14.) 



Testa transverse oblongo-ovata, compressiuscula, fulvo-fusca, supra 

 albo picta, versus marginem tenuiter concentrice striata, ubique 

 oblique costata; costis 12, latiusculis, rotunde convexis, inter- 

 stitiis subaequaliter latis ; umbones incurvati, approximati, antice 

 locati ; margo dorsalis posticus elongatus, leviter arcuatus, anticus 

 abrupte truncatus, utrinque rotunde convexus, ventralis leviter 

 arcuatus ; cardo normalis ; pagina interna lsevis, alba, ad mar- 

 ginem crenulata. 



Diam. umbono-marg. 21, antero-post. 29 mm. 



Hab. Kii, Japan. 



This shell is chiefly remarkable for the extremely anterior 

 position of the umboes, making the radiating ribs unusually 

 oblique. 



Cardita regidaris, sp. n. (Pi. III. fig. 15.) 



Testa subtrigonalis, ventricosa, crassa, fusca, radiatim costata ; 

 costis 12, latiusculis, transversim rugose plicatis, interstitiis majis 

 angustis laevigatas ; umbones obtusi, ante medium locati ; area 

 valvarum antica oblongo-cordiformis, leviter concava, postica 

 elongata, compressa, utrinque rugose striata ; margo dorsalis 

 anticus brevis, valde declivis, posticus elongatus recto declivis ; 

 latus anticus rotundatum, posticus acuminatum, biangulatum. 

 Pagina interna lilaceo-fusco tincta, margine crenulata ; impres- 

 siones musculares utrinque ovali, impressi. 



Diam. umbono-marg. 30, antero-post. 40, crass. 25 mm. 



Hab. Goree, West Africa. 



Compared with C. antiquata, Linn., the form of this shell 

 is more triangular, umboes more nearly central, radiating ribs 

 more strongly plicate, interstices not so deep. It is further 

 distinguished by the shallow depressions before and behind 

 the umbones. 



I have only seen one adult and two young specimens, 

 which were in the collection of the late Monsieur Denans, 

 with label indicating habitat as above. 



