250 APORRHAIDiE. 



genera, viz. Murex frondosus and Murex costosus. The 

 present genus is his Pes anserinus. Philippi more cor- 

 rectly, but unnecessarily, renamed it Chenopus. 



1. Aporrhais pes-peleca'ni*, Linne. 



Strombus pes pelecani, Linn. S. N. p. 1207. A. pes-pelecani, F. & H. iii. 

 p. 188, pi. lxxxix. f. 4, and (animal) pi. II. f. 3. 



Body creamcolour, mottled in front with purplish -brown, 

 or light purplish-brown, with white flakes and specks : snout 

 extending far beyond the foot, often pinkish, minutely speckled 

 with yellow or white dots ; edges sometimes yellow ; extremity 

 cloven perpendicularly : tentacles diverging, fleshcolour, with a 

 scarlet or white line down the middle, speckled like the snout ; 

 tips blunt, sometimes dark brown : eyes small, black, placed 

 on prominent bulbs : foot extensile, narrow, white (occasionally 

 spotted with .pink), attached to the rest of the body by a broad 

 and thick neck or stalk, square in front and rounded behind : 

 verge long, strap-shaped, recurved, and yellow: odontophore 

 short [; rhachis broad and convex above, narrower below, the 

 front or cutting edge having a central spire and notched on 

 each side ; uncini, 1st nearly transverse, with its upper margin 

 folded, 2nd and 3rd claw-like, slender, elongated, and inter- 

 crossing with those on the opposite side. (Loven)]. 



Shell having an irregularly triangular or shoulder-of-mut- 

 ton shape, with a jagged outline, solid, opaque, somewhat 

 glossy : sculpture, short longitudinal ribs, which are thick and 

 nodose or tubercular on the lower whorls, thin and curved on 

 the upper whorls, becoming more numerous and very fine to- 

 wards the point of the spire ; there are 3 rows of nodules on 

 the body-whorl, those of the uppermost row being the 

 largest, those of the middle row next in size, and those of the 

 lowest row small, bead-like, and more or less confluent ; the 

 rows are continued and project in the form of ridges on the 

 pterygoid or wing-like processes of the outer lip (all of which 

 are similarly strengthened), like the joints of a bat's wing; 

 each of the next two or three whorls has only 2 rows, viz. one 

 of large nodules in the middle, the other (which is frequently 

 indistinct) of small beads close to the suture ; the entire sur- 

 face of the shell is covered with delicate and close-set impressed 



* Pelican's foot. 



