446 MR. H. ADAMS ON NEW SPECIES OF SHELLS. [NOV. 22, 



stitiis oblique liratis ; valva postica et valvis mediis subcarinatis, 

 areis dorsalibus dense longitudinaliter liratis, areis lateralibus ra- 

 diatim costatis, costis pustulosis. Limbus mediocris, spiculis bre- 

 vibus corneis instructus. 



Long. 15, lat. 9 mill. 



Bab. ? 



Fam. HelicidjB. 



3. Clatjsilia (Phcedusa) similaris, sp. nov. (PI. XXXVIII. 

 fig. 10.) 



C. testa vix rimata, fusiformi, solida, confertim striata, scricea, rufo- 

 fusca; spira sursum attenuata, apice obtuso ; anfr. 10, convexius- 



culis, ultimo basi rotundato ; apertura subverticali, pyriformi ; 

 lamellis incequalibus, supera tenui, marginali, in/era fere immersa; 

 lunella distincta, extus conspicua ; plica palatali 1 , elongata, sub- 

 columellari ad marginem perislomatis producta ; perist. continuo, 

 superne breviter soluto, expanso, albido. 

 Long. 18, diam. 4g mill. 

 Sab. Formosa. 



This species, which was collected by Mr. Swinhoe in Formosa, I 

 have placed in the subgenus Phcedusa. It is closely allied to C. exilis, 

 described by me in a former paper, and referred to the subgenus La- 

 ciniaria, but which must also be included in Phcedusa. 



Fam. Cyclophorid^e. 



4. DlPLOMMATINA(DlANCTA)MARTENSI,Sp.nOV. (Pl.XXXVIII. 

 fig. 11.) 



D. testa sinistrorsa, rimata, pupiformi, gibbosa, tenui, flavida, sub- 

 remote minutissime striolata ; spira conica, sutura impressa, apice 

 obtusiusculo ; anfr. 6, convexis, penultimo angustiore, ultimo ad 

 antepenultimum ascendente ; apertura subverticali, plica columel- 

 lari obsoleta ; perist. duplici, expanso ; callo parietali crasso, late 

 expansO, appresso. 



Long. 3^-j diam. 2 mill. 

 Bab. —1 



Fam. Unionid.e. 



5. Anodonta swinhoei, sp. nov. 



A. solidula, transversa, oblong o-ovata, subventricosa, concentrice 

 obsolete plicatu ; margine dorsali elongato, subrecto ; margine 

 ventrali arcuato ; latere antico rotundato ; latere postico sub- 

 angulato, superne obsolete radiatim plicato ; umbonibus ante- 

 medianis, inconsjncuis ; epidermide olivaceo-picea induta ; mar- 

 garita ccerulente, postice iridescente. 



Long. 90, alt. 50, lat. 28 mill, 



Hab. Formosa. 



Several examples of this species, which does not appear to have 

 been hitherto described, were obtained by Mr. Swinhoe. 



