Zoological Society, 213 



""This shell, which approaches rather in appearance to that of the 

 Lingula anatina, may nevertheless be distinguished by its complete 

 oval form ; though it is somewhat acuminated at the apex, the um- 

 bones are much less prominent, and the valves are more compressed, 

 and more closely united all round. 



Lingula tumidula^ Ling, testa corned, tenuissimd, rubro-oli- 

 vaced, subquadratd, versus apicem parilm attenuatd, umbonibus vix 

 prominulis ; valvis tumidulis, marginibus irregulariter reflexis. 



Hab. ad oras Nova? Hollandia?. 



Long. 2-/Q ; lat. l/ n poll. 



Reeve, Conch. Syst. v. i. p. 180. pi. 125. f. 4. 



" The shell of the Lingula tumidula differs materially, both in size 

 and composition, from that of any of the previously known species ; 

 it is considerably larger and thinner, and rather horny than calca- 

 reous, and the colour of it is a burnt olive-red. From the swollen 

 appearance of the valves I am inclined to think that the shell is 

 perfectly pliable and elastic during the life of the animal. 



Lingula compressa. Ling, testd corned, tenuissimd, valde com- 

 pressd, fusco-olivaced, subquadrato-ovali, versus apicem attenuatd, 

 umbonibus depressis, indistinctis ; valvis utrinque clausis. 



Hab. ad Palanam, ins. Masbate, Philippinarum. 



Long. 1 &q ; lat. L£* poll. 



4< This curious species was found by Mr. Cuming in sandy mud at 

 low water at Palanas, Island of Masbate, one of the Philippines. Its 

 shell is of the same thin horny composition as that of the Lingula 

 tumidula ; in fact I at first took it to be merely a local variety of that 

 species. Upon comparison however I feel assured that it is di- 

 stinct ; it is more attenuated towards the apex, and from the valves 

 being remarkably compressed and closely united all round, I am in- 

 duced to suppose that the animal must be proportionably smaller. 

 The two specimens from which the above description is drawn do 

 not exhibit the pallial cilia, which Mr. Cuming's usual care would 

 have protected ; they may therefore not have been exserted beyond 

 the margin of the valves. He did not succeed in obtaining the pe- 

 dicle of this species. 



"Mr. Cuming exhibits on this occasion specimens of all the known 

 Lingula from his own collection, and I am not aware that four 

 species out of the seven exist in any other. They belong to a class 

 of mollusks of which few recent varieties are known, and may there- 

 fore be highly esteemed for their conchological interest." 



The next paper read was from Mr. G. B. Sowerby, jun., and is 

 entitled " Descriptions of nine species of the genus Pupina." 



Gen. Pupina, Vignard. 



Molluscum terrestre. 



Testa subcylindrica, vitrea, nitidissima, anfractibus quinque ad sex, 

 penultimo inflato, ultimo paululum coarctato ; apertura circulari, 

 margine crasso, reflexo, ad basin columellas inciso, vel emargi- 

 nato. 



Operculum corneum, spirale. 



