PERN A. 



Plate VI. 



Species 25. (Miis. Cuming.) 

 Pekna attenuata. Peru, tenia elomjatd, rude lamiuala, 

 antice Jinibriato-alnia, versm uwlmnes attcauald ; pur- 

 pureo-nigrd. 

 The attenuated Perna. Shell elongated, rudely la- 

 minated, anteriorly fimbriately winged, attenuated 

 towards the umboes ; purple-black. 

 Hob. Red Sea. 



Of a narrow form, with a broad, fimbriated wing, pecu- 

 liarly attenuately pressed inwards. 



Species 26. (Mus. Cuming.) 

 Perna vespektilio. Pern, testa clongatd, arcuatd, con- 

 spicue late alatd, utrinque Jimbriato-snlcatd ; sordidi 

 tutescente-alia, ad basin subpurpnrascente. 

 The bat Perna. Shell elongated, curved, conspicuously 

 broadly winged, fimbriately grooved on each side; dull- 

 yellowish-white, tinged with purple at the base. 

 Hab. Bay of Manilla ; Cuming. 



The bat's-wing lobe of this species is strikingly deve- 

 loped. All the specimens taken by Mr. Cuming were of 

 the same uniform dull yellowish-white colour. 



Species 37. (Mus. Cuming.) 

 Perna lentiginosa. Pern, testa elongald, irregulari, 



teuui, subpellucido-corned, Icsvigaia, versus extremita- 

 tem laminatd, basi angustd ; lutescente-albd, nitente, 

 macuUa purpureis undique lentiginmd, ad marginem 

 purpurea tinctd. 



The freckled Perna. Shell elongated, ii-regular, thin, 

 semitransparent-horny, smooth, laminated towards 

 the extremity, base narrow ; yellowish-white, shining, 

 freckled throughout with purple spots, tinged with 

 purple at the margin. 



Eab. Philippine Islands ; Cumiug. 



The freckled painting of this species is a character not 



observed in any other, and the narrow base is peculiar. 



Species 28. (Mus. Cuming.) 

 Perna spathulata. Pern, testa subpyriformi-ovatd, 

 depress iMscnld, irregulari, versus marginem rude lami- 

 natd ; lutescente-albd, purpurea marginatd. 

 The spathul.^te Perna. Shell somewhat pyrifomily 

 ovate, rather depressed, irregular, rudely lamiuated 

 towards the margin; yellowish-white, edged with 

 purple. 

 Hab. Island of Negros, Philippines ; Cuming. 



Very rudely laminated in respect of sculpture, but pe- 

 culiar in form. 



November, 1858. 



