Mr. Gray's Monograph on the Cypraidas. 495 



a little smaller and closer; columella smooth; inside purplish 

 white. Axis A§, diameter T % of an inch. 



Shell when young with three pale blue bands like the former, 

 and when worn, purplish, with a white margin. 



63. Cyprcea caput Serpentis. — The Snakes-head Cowry. 



Testa ovata, scutellata, albida, dorso fusco-reticulato ; margi- 

 nibus incrassatis, depressis, lasvibus, fusco-nigricantibus ; extremi- 

 tatibus albo-maculatis ; subtus planulatis ; dentibus albidis. 



Cypraea caput serpentis. Lin. Sys. Nat. 1175 ! Martini, j. 

 387. Born. Mus. 179. Schroeter Einl. 107. Gmelin 3406. 

 Schreiber's Conch, j. 62. Lamarck Ann. Mus. xvi. 90. Hist. 

 vii. 385. Dillwyn R. S. 446. 



Icon. Bonanni Rec. iii. f. 258. Kirch, iii. f. 257. Lister. 

 Conch, t. 702, f. 50 ! t. 704, f. 52i Rumphius Amb. t 38. f. F. 

 Pet. Arab. t. 16. f. 7. Gaz. t. 96. f. 9. Gaultier t. 15. f. O. 

 Adanson Senegal, t. 5. f. G. Knorr, iv. t. 9, f. 3. Favanne t. 

 30. f. F. 1. Martini i. t. 33. 316. Encyc. Method, t. 354. f. 4 ! 



2. Incompleta. Testa ovato-oblonga, albida, fusco-reticulata ; 

 marginibus subincrassatis, pallidis. 



Cypraea reticulum. Gmelin 3407. 



Cypraea n. 1 1 . Schroeter Einl. j . 1 36. 



Icon. Lister. Conch, t. 701. f. 49 ! Martini, j. t. 26. f. 259. 



3. Decorticata. Testa albido-caerulea ; marginibus fuscis ; ex- 

 tremitatibus albido-maculatis. 



Inhabits Indian Seas, Mauritius, Lister. Isle of Nassatella, 

 Rumphius. Borneo, Petiver. Senegal, Adanson. Otaheite, 

 Solander. Isle of France, Lamarck. 



Shell ovate, shield shaped, whitish, the back covered with 

 chesnut brown reticulations, leaving irregularly sized round white 

 spots; the spire prominent, covered; the margin thickened, pro- 

 duced, depressed, smooth, of a fine blackish brown colour, with a 

 white squarish spot at each extremity just over the slit ; the base 

 flattish, dark brown, near the margin, paler and shelving to- 

 wards the mouth ; the month rather narrow ; teeth nearly equal, 

 smallish, close, with the interspaces brown, scarcely extended over 

 2l 2 



