PECTEN.— Plate XIX. 



this species, and represented in the plate which follows 

 Fig. 76, is certainly distinct. 



Species 70. (Mus. Cuming.) 



Pecten oblitekatus. Pect. testa orbiculari, ienuiculd, 

 com.pressd, utrinque paululiim hiante, eequilaterali, 

 aquivalvi, extus lavigatd, nitente, intus creberrime 

 radiatim liratd ; ptirpurascente - sanguined, radiatd, 

 valvd dextrd pallidiore. 



The worn Pecten. Shell orbicular, rather thin, com- 

 pressed, a little gaping at the sides, equilateral, equi- 

 valve, smooth and shining without, very closely ra- 

 diately ribbed within ; purplish-blood colour, right 

 valve paler. 



Ostrea obliterata, Linnaeus, Syst. Nat. (12th edit.) p. 1146. 

 Pecten obliteratus, Lamarck. 



Hub. China. 



Allied to P. Laurentii and pleuronectes, but uniformly 

 distinct from either of those species. 



Species 71. (Mus. Cuming.) 



Pecten lividus. Pect. testd mbquadrato-ovatd, altiore 

 quam longd, subirregulari, (equilaterali, aquivalvi, 

 costis creberrime foUaceo-squamaiis decern aut duode- 

 cim cum minoribus interpositk irregulariter radiatd, 

 hiterstitiis liratis; cnpreo-fmcd, costis inajoribus luteis, 

 lineis fenuibus fulgetris albis circa umbones ; auriculm 

 inaqualibm, grandibus, obliquis. 



The livid Pecten. Shell somewhat squarely ovate, 

 higher than long, rather irregidar, equilateral, equi- 

 valve, irregularly rayed with ten or twelve very 

 closely foliaceous scaled ribs, with small ribs inter- 

 vening, interstices ribbed ; coppery-bro\va, the larger 

 ribs yellow, with fine whitish zigzag lines around the 

 umboes ; ears unequal, large, oblique. 



Lamakck, Anim. sans vert. (Deshayes' edit.) vol. vii. 

 p. 154. 



Hab. ? 



This species has a close afi&nity with P. sqnamosus, 

 although the sculpture is so much more strongly deve- 

 loped. 



