TB8TACEA. 



The shell baa about ten distinct volutions, of which the last is 

 infinitely (lie largest. All are very convex and prominent, enlarging 

 regularly from the first to tin- origin of the last. The surface in mnm>wh:it 

 wnooth, of a taint brownish* shade tending to croum colour. The animal 

 is of the lightest grey or white, with a bead rather .-mall, and the *,!,- 

 very large, with an obtuse extremity . the shoulder I. in.nl. and the corner* 

 almost hooked. A blade eye in seated externally on the middle of -.i. h 

 of the two tenUirul.i 



This animal dwells in deep water*, from which prohably, on seizing 

 the bait, it is frequently brought up by the lines of the fishermen. Hut 

 either from natural delicacy, maltreatment, or some other cause, it wir- 

 llfW a very short time in confinement ; t>o that it is very diflicult to 

 obtain satisfactory delineations. The specimen represented is about half 



PUITEX. 



Flo. 1. Ftumi MTMM, MOO from abovr. 

 2. The Mune, under surface. 



RET I IT I. A TED SHELLS. 

 BCCCINUM MACULA. Plate X. Fig*. 3, 4. 



Length of the shell above half an inch ; volutions seven. The 

 surface is universally furrowed longitudinally and transversely, so us to 

 resemble articulations. Animal a Umax ; sole Urge, triangular processes 

 broadening the shoulder ; posterior extremity indented by a noteli. Ten- 

 tacula large, with a black eye at the external base of each. As in other* 

 the interior part of the beard is prolonged in a thin skin, folding longi- 

 tudinally, so that, when the sides arc closed, it resemble;* a pmbom-i*. 

 This organization, always protruding in front of the animal, equal* the 

 length of its body. It is often erect ; so that, when the .shell sinks among 

 the substances below, the protrusion betrays its place. Colour of the 

 ghell and animal brownish. 



