346 Capt. P. P. King’s Description of 
52. MARGARITA FASCIATA, _D. s. 
M. testa albidd, creberrimé striata, purpureo fasciata, aperturd argented; 
long. +4;; lat. ~; fere; poll. 
Habitat in Mari Pacifico. Mus. nost. 
Portions of the striated surface are elevated into belts, which are of a 
purple colour. 
53. MARGARITA VIOLACEA, 
M. testa sub-ovatd, violaced, spird brevi ; anfractibus tumidis; aperturd 
aridescente ; long. ,7;; lat. 8; fere; poll. 
Habitat ad fretum Magellanicum. Mus. Brit., nost., Brod. 
Of this shell the Indians make their necklaces ; it is found adhering 
to the leaves of the Fucus giganteus, and is the principal food of the 
Racehorse Duck (Micropterus Patachonicus, nob. in Proceedings of the 
Zoological Society, December 14, 1830, page 15.) 
54. MARGARITA CCERULESCENS. 
M. testd sub-complanatd, ceruled, striatd, albido-lineatd, aperturd irides- 
cente; lat. +3 fere; long. +25; poll. 
Habitat ad fretum Magellanicum, (Cape Gregory.) Mus. Brit., nost., 
Brod. 
55. TuRRITELLA TRICARINATA. 
T. testd turritd, anfractibus tricarinatis ; carinis nodulosis ; long. 13 ; 
lat. °; paulo minus ; poll. 
Habitat ad oras Americe meridionalis (Valparaiso.) Mus. Brit., 
nost., Brod. 
The Carine are nodulous, or twisted like the strands of a rope; 
the twists of the upper carina are in the direction of a water-laid, or 
right-handed rope, and those of the two lower carine@ are in the oppo- 
site direction, or like what is termed a hawser-laid rope. Between these 
nodulous carine are elevated lines, and the base is very strongly striated. 
Found in deep water in the Bay of Valparaiso. Dead shells of this spe- 
cies are occasionally found thrown upon the beach, near the Almendral. 
