248 MARGINELLA. 



their movements than Cypraa, crawling pretty briskly, 

 and moving their tentacles in various directions. They 

 travel much faster than a snail. The two dilated anterior 

 angles of the foot appear to be endowed with acute sen- 

 sation, the animal making use of them as feelers. Many 

 are of the most beautiful, and brilliant colours ; a pale, 

 semi-transparent, pinkish-yellow mantle, with a range of 

 semi-elliptic crimson spots around the thin free edge, and 

 the remainder covered with vertically radiating, linear 

 spots, and short waved lines of the same colour; the 

 foot, also of a yellowish delicate pink, is marbled all over 

 with the deepest and richest crimson, and the same with 

 the siphon. The tentacles are yellowish, with a row of 

 marbled crimson spots. The eyes are black, and very 

 minute. The animal of the species above described, when 

 roughly handled, retracted itself entirely into the shell. 

 It was dredged up in three fathoms water, sandy bottom, 

 not far from Anjer, in Java. 



Another species of Marginella, from the east coast 

 of Africa, is similar to the former, but the foot is rather 

 more expanded and more rounded behind. The left side 

 of the mantle is rather more produced over the body of 

 the shell than the right. The ends of the tentacula, and 

 siphon, in this species, are yellow, and the basal parts 

 streaked with carmine. A third species from Unsang, 

 east coast of Borneo, also taken with the dredge, was of a 

 light-brown colour, with burnt sienna around the margin 

 of the mantle. 



I may, here, perhaps, introduce a brief notice of the 

 habits of the Carrier-Trochus, or Phorus, whose history, at 

 present, is so little known ; on our passage from Singapore 



