60 LAMELLIBRANCHIAfA. 



33. P. lineolata. Gray, Die/. N.Z., \\.,p. 253. Elongato-oblong, 

 compressed, rounded iu front and slightly angled behind. Purplish 

 pink, with darker concentric bands, and radiating rays of lighter; 

 interior reddish purple. Height, 1'5 ; length, 3. 



Common. Chatham Islands. 



34 P. ZOnaliS, LamctrJc(?), vi., p. 182. Oblong, rather thin s 

 rounded in front and obliquely truncated behind, with fine concentric 

 striae, which are deeper and waved at the posterior end ; teeth small. 

 Yellowish orange, with concentric bands of darker, and rayed with 

 white. Height, - 5 ; length, 1. 



Stewart's Island. 



35. P. afflnis, Reeve. Oblong, rounded in front and rather 

 obliquely truncated behind, with fine concentric strige, which are 

 slightly waved at the posterior end ; teeth strong. Bright salmon 

 colour, paler towards the margin, and with fine waved interrupted 

 radiating striae of darker. Height, - 5 ; length, - 9. 



HIATULA. 



Oval-oblong, compressed, equivalve, sub - equilateral, umbones 

 slightly posterior, rounded in front, more attenuated and sub-carinate 

 behind ; hinge straight ; teeth f ; ligament external, prominent. 



Australia. 



36. H. nitida, Gray, Dieff. N.Z., ii., p. 253. Oblong, thin, 

 pellucid, smooth. Pale violet, covered with a polished horn-coloured 

 epidermis ; interior violet. Height, 1 ; length, 2. 



Common. 



* 37. H. SiliqU88, Hart. Shell narrowly transverse, thin, equi- 

 lateral, smooth, flesh white, covered with a shining transparent olive 

 horny epidermis, faintly two-rayed on the posterior side, anterior side 

 rounded, posteriorly obliquely acuminately rounded. (Reeve.) 



* 38. H. incerta, Reeve. Shell oblong transverse, broader pos- 

 teriorly, thin, inequilateral, smooth, covered with a thin horny epidermis, 

 obscurely two-rayed posteriorly ; anterior side rounded, posterior ob- 

 liquely truncated. (Reeve.) 



* 39. H. nitens, Tyron, Am. Jour. Conch., r.,p. 171. 

 I have seen no description. 



TELLINGS. 



Slightly iuequivalve, compressed, rounded in front and slightly 

 folded behind ; umbones sub-central ; teeth f , laterals T, most distinct 

 in the right valve ; pallial sinus very wide and deep ; ligament external, 

 prominent. 



World-wide. 



40. T. albinella, Lanark, vi., p. 194. Oblong, very thin, pel- 

 lucid, white, very finely concentrically striated ; anterior end rounded 



