PTEROPODA. 489 
This resembles a West India species, which has the sides much 
more deeply concave, and the lateral angles prolonged into spines. 
Described from Mr. Dana’s figures. 
Figure 605, shell and animal enlarged ; 605, transverse section of 
the shell; 605 4, natural size. 
CLEODORA MUNDA (Gould). 
T. elongato conica, modicé recurva, subcompressa ad apicem rosacea: 
apertura rotundato-elliptica. Animal alis fere transversis late coadu- 
natis, oblique triangulartbus, subarcuatis instructus. 
Alar expansions broadly united at base, ovate triangular, greatest 
breadth nearly equal to greatest length; anterior margin convexly 
arcuate, with an acute spine at the middle; posterior margin two- 
thirds the length of the anterior, concavely arcuate ; terminal margins 
rectilinear, convergent; the angles minutely rounded; surface exhi- 
biting ranges of cilie; basal lappet very small, forming a very low 
triangle. Head large; eyes conspicuous. ‘The alimentary tube is 
seen passing to the apex of the shell, which is occupied by a straw- 
coloured viscus, above which is a deep-green cylindrical mass: just 
behind the head is an excretory duct and its orifice, which has made 
half a spiral turn around the neck. At the superior third of the shell 
are seen scarlet bands of muscular fibres surrounding the mantle, 
which rises to a level with the mouth of the shell. The colour has a 
pale-roseate, somewhat iridescent tint. 
SHELL acutely conical, moderately recurved; aperture circular or 
somewhat oval; tip roseate. 
Length one-fourth of an inch. 
Found in the equatorial Atlantic by Mr. Dana. 
This is possibly C. virgula, Rang, as figured in the Voyage of the 
Bonite, pl. 8, f. 18-22; but as this is not satisfactorily determined, the 
excellent figure of Mr. Dana is introduced. 
123 
