CYTHEREA. 



Plate II. 



Species 5. (Miis. Cuming.) 



Cytherea po^DEROSA. Cytlt. testa subquadrato-lrigona, 

 crassd, pondei'osa, sordide laded, roseo-pitrpjirascente 

 paUide radiatd, laviiiscidd, nitente, concentrice ru- 

 gosd, area ligamenii latiusculd. 



The HEAVY Cythekea. Shell somewhat squarely tri- 

 angular, thick, heavy, duU cream-colonr, faintly 

 rayed with rose-purple, nearly smooth, shining, con- 

 centrically rugose, ligamentary area rather broad. 



Hanley, Descr. Cat. p. 107. 



Trigona damaoides, var., Deshayes. 



JJa/,. .? 



M eshayes quotes this species as a variety of C. da- 

 :, which is a distinct form of uniforralv smaller size. 



Species 6. (Miis. Cuming.) 



■'EEEA castanea. Ci/t/i. testa ova/o-cordatd,posiice 

 oblique prodiictu, crassd, lavigatd, niteiile, paUide ca%- 

 trnied, violaceo pullide radiatd, latere postico violaceo 

 tiiicto, margiuibiis albis. 

 The chestnut Cytherea. Shell ovately heart-shaped, 

 posteriorly obliquely produced, thick, smooth, shi- 

 ning, light chestnut, faintly rayed with violet, poste- 

 rior side stained with violet, mararins white. 



Lamarck, Anira. sans vert. vol. vi. p. 



Meretrix castanea, Deshayes. 

 Hah. China. 



299. 



There is a variety of this species in which the chestnut 

 colouring is replaced by pale yellow. 



Species 7- (Mus. Cuming.) 



Cytherea petechialis. Cyth. testa subtrigouo-ovatd, 

 fulvescente-lactea, maculis iiiidatis nigricante-f/tscis 

 concentric!; uebidald, latere postico oblique cnrrato, 

 Icevigald, epidermide corned nitente indiitd. 



The petechial Cytherea. Shell somewhat triangu- 

 larly ovate, fulvous cream-colour, concentrically 

 clouded with ark-brown zigzag marks, posterior 

 side obliquely curved, smooth, covered witli a shi- 

 ning homy epidermis. 



Lamarck, Auini. sans vert. vol. vi. p. 229. 

 Meretrix petechialis, Deshayes. 



Hub. China. 



Lamarck's French translation of the specific name 

 given by him to this species is '' petecldale," but 1 have 

 sought in vain to discover its meaning, unless it refers to 

 the shore of the province of Pe-tche-li, China, as one of 

 the places of habitation. 



Januarv, 1804. 



