Cyprcca reticulata and Cypraa histrio distinct. 4S3 



C. arabica, var. histrio, pars. Gray, March, 1824. Monog. in Zoologi- 

 cal Journal, Vol. I., p. 77. 



G. mnculatn. Barnes, April. 1824. Annals of Lye. Nat. Hist., Vol. I., 

 pp. 132, 385, pi. 9, f. 1. 



C. arabica, var. Sowerbv, 1830. Conchological Illustrations, f. 80. 



C. histrio. Deshayes, 1832. Enc. Meth. Vera., t. 3, p. 817, No. 8. 

 (fig. excl.) 



C. histrio. Kiencr, 1843. Iconographie des Coqnillcs Vivantcs, Gen. 

 Cyprn-a, p. 104, tab. 18, f 1. 



C. histrio, pars. Deshayes, L844. Ed. Lamarck's Anim. sans Verte- 

 bres, Vol. 10, p. 49G. 



C. reticulata. Reeve, (syn. excl.) 1846. Conchologia Iconica, Genus 

 Cypnca, pi. 1, f. 3. 



Description. — Shell ovate, very convex, and sometimes subgib- 

 bous above, flattened beneath; sides strongly thickened; spire 

 apparent. The color above is a deep chesnnt-brown, everywhere 

 sprinkled with round whitish or yellowish spots, usually isolated, 

 but sometimes confluent. Beside tbese spots, the groundwork of 

 the coloring is broken in upon by occasional minuter white spots 

 and longitudinal lines, irregularly diffused. Dorsal line nearly cen- 

 tral, somewhat irregular, and undulating. The sides are whitish, 

 passing into bluish gray, and thickly covered with intensely brown 

 or black spots, which are often transversely extended. A large 

 spot of this character always appears upon each side of the ante- 

 rior and posterior emarginations. Color beneath whitish, slightly 

 clouded with brown, with a dark-brown or black spot on the cen- 

 tre of the left lip. This spot may be more or less obscured by a 

 subsequent deposite of enamel, but is always apparent. The aper- 

 ture is slightly curved, the columellar lip flattened within, and 

 deeply hollowed toward the lower or anterior end. Teeth usually 

 about 25 in number on each side, but varying from 20 to 30; well 

 defined, chesnut-brown, which color extends outwardly beyond the 

 real extent of the teeth, particularly near the centre of the left mar- 

 gin, where they seem to extend nearly to the dark spot mentioned 

 ■above. 



Length 2.9 inche3. Breadth 2.0. Height l.G. 



Haiutat. — 1 am not in possession of sufficient facts to determine 

 the geographical limits of this species, but so far as I know it is 



