122 JOURNAL OF CONCHOLOGY, VOL. II, NO. 4, OCTOBER, I904. 



A dark fawn-coloured example, with semipellucid appearance was 

 dredged off Nuyat at seven-ten fathoms. 



Cypraea Ovata Perry (Conch., pi. xxi., iig. 3, 18 11). 



Cypraea turdus Lam. (Anim. sans Vert., vii., p. 392, 1822). 



P.G. M.C. I. 



Everywhere in the greatest plenty and variety : a remarkable series 

 of the species, several hundreds in number, exhibits all the limits 

 of variation. 



When young the dorsal surface is generally dark cinereous brown, 

 the shelly deposit, especially laterally, being thin and unformed. 

 Later, when full growth is attained, the sides have a whitened callous 

 appearance, the deeper coloured maculations only being partly visible. 



Cypraea ovata seems to vary chiefly 



{a) in size : the following are maximum and minimum measure- 

 ments — long. 53, lat. 35 mm. ; long. 22, lat. 15 mm. 



The large pyriform examples {j>yriformis Sowb.) mainly come from 

 Karachi. Further west, especially in the Persian Gulf, the form is 

 stunted, incrassate, ovate, the colouring bluish grey, occasionally white 

 [nivea Gray). The base in fresh specimens is often tinged with ex- 

 tremely pale pink. 



The most frequent cowry of the region, it abounds principally 

 amongst Pearl Oysters, with C. lentiginosa Gray, and C. finibriata L. 



Cypraea talpa L. 



P.G. Maskat. 



Very rare : we have only seen one example from the above locality, 

 brought in by fishermen. 



Cypraea ziczac L. 



P.G. Thumb Island, Gulf of Oman, Maskat. Muddy sand and 

 stones at seven to fifteen fathoms ; very beautiful varieties occur but 

 the species is always rare. 



Trivia globosa Gray. 



P.G. Gulf of Oman. Lat. 24° 58' N., Long. 56° 74' S., 156 fathoms. 

 Rare. 



I. Lat. 18° 58' N., Long. 71° 45' E. Forty fathoms. Rare. 



Trivia oryza Lam. 



I. Karachi. Rare. 



Trivia scabriuscula Gray. 

 P.G. Gulf of Oman. Malcolm Inlet. 



Dead examples at twenty-four fathoms, mud. Lat. 24° 57' N., 

 long. 57° 59' E., thirty-seven fathoms, sand and mud. 



