70 



aequalibus, scabroso-sulcatis, posticis parvis, obtusis ; anticis 

 magnis, acutis; costis numerosis, parvis, scabris, sub-angulatis; 

 colore, miniaceo, radiis septem, albo purpureoque maculatis : 

 umhonibusalbis,purpureo,rubroquemaculatis: variatpurpureo, 

 nigro maculato. Long ], 20, lat 0, 42 ; alt 1, 45. ; poll. 



A ratber flat, obliquely-oval, irregular species, with unequal 

 auricles and numerous serrated close set ribs. The under 

 valve is rather more ventricose than the upper. The colour 

 is scarlet with seven rays of interrupted white, mottled with 

 purple ; near the umbones the shell is white, mottled with 

 purple. Collection of the Rev. F. J. Stainforth. 



Mr. Sowerby has a purple variety. 



76. P. squamatus. (pi. xiii. f. 5/, 58.) GmeL p. 3329. 

 Lister. Conch, t. 1S3. f. 20. 



T. rotundato-sub-trigona compressa, irregulariter sub-ajqui- 

 valvi ; valva sinistra paululum convexiori ; auriculis magnis, 

 costatis, aculeato-squamiferis, antica lata, sub-acutangulata; 

 costis alterius valvee quinque ad septem, latis, lrevibus, rotun- 

 datis, aculeato-squamiferis, irregularibus,quindecim minoribus, 

 interstitialibus, interstitiis minutissime punctatis, alterius cos- 

 tis irregularibus, squamiferis, ineequalibus ; colore brunneo- 

 rufescente, costis magnis squamiferis rubris ; variat testa alba. 

 Long. 1. 75.; lat. 0.50. ; alt. 1. 85.; poll. 



A smooth flattish shell, with from 5 to 7 broad ribs, with 

 large elevated scales, the intervals being filled up with several 

 narrow ribs in each. The ground colour is dull clouded 

 brown, relieving the principal ribs, which are red. An 

 inspection of the figure in Lister, referred to by Gmelin, will 

 remove all doubts as to the identity of our shell, which has 

 been erroneously figured in Reeve's " Conchologia Systema- 

 tica," as Rastellum, Lam. The white variety is figured by 

 favour of Miss Saul. 



77. P. Brueii. (pi. xx. f. 241, 242.) Payr. Moll. p. 78. 

 pi. 2. f. 10, 11. 



" P. testa sub-rotundata, eequivalvi, sub-sequilatera, flava; 

 radiis valvse superioris variis, alternis minoribus, in longum 

 lineatis et tenuiter squamosis ; radiis valvee inferioris binis, 

 etiam lineatis et papillosis ; auricula altera minima ; novem 

 ad undecim lineas lata." 



" Hab. les Golfes de Sagone, dAjaccio, de Valineo, de Porto 

 Vecchio, Peu abondant." 



The rays of the upper valve alternate irregularly in size, 

 they are slightly annulose or j}apillary ; those of the lower are 

 also irregular and papillary, but are disposed in pairs. The 



