508 MAZATLAN UNIVALVES 



646. (c.) ANACHIS , sp. ind. 



Tablet 2424 contains a sp. too much incrusted for identifi- 

 cation, which may be a dwarf Anachis c. pachyderma, or a 

 distinct species. 



Hob. Mazatlan ; 1 sp. off Spondylus ; ISpool Col. 



647. ANACHIS COEONATA, Sow. 



Columbella coronata, Soio. in Proc. Zool. Soiv. 1832, p. 114 : 



TJies. Conch, p. 135, no. 70, pi. 39, f. 134. Desk, in Lam. 



An. s. Vert. vol. x. no. 32. 



Comp. Columbella costata, Vol. Hec. Obs. vol. ii. p. 331. 

 ?]N"on Columbella coronata, Duel, in CMnu, Conch. HI. pi. 8, 



f. 17, 18. JET. # A. Ad. Gen. i. 182. 

 ? = Columbella Terpsichore, Wee. in Zeit.f. Mai. 1851, p. 185, 



no. 64 : (non Sow. Gen. f. 6. W. Indies.)* 



The very few specimens found at Mazatlan, and referred to 

 this species by Mr. Gaskoin, differ not a little from the type 

 and among themselves. Some are slender, acuminate, with 

 the tubercles changed into eostse, except the last few. In 

 these the ribs are very numerous and fine. Two others have 

 more the typical shape of A. varia, with the ribs further apart, 

 and in front slightly tubercular. They are known from the 

 previous species by the smoothness of the upper whirls. The 

 inside of the outer lip is more finely toothed, (the denticles 

 running into grooves,) and is often richly stained. The paint- 

 ing is very fine ; brownish purple pencilings on a light ground. 

 Epidermis very thin, smooth and greenish. An elongated 

 specimen measures long. '52, long.spir. '27, lot. *2, alt. 37. 



A broad sp. '52, "25, '26, 42. 



Hab. Bay of Panama, under stones, Cuming. Acapulco, 

 Quibo ; Gaskoin. Mazatlan ; extremely rare ; L'pool Col. 



Tablet 2425 contains 4 sp. The first dead, bitubercular ; 

 the second, richly coloured; the third light, finely ribbed; 

 the fourth light, coarsely ribbed. 



* The Buccinum gilvum of Wee. in Zeit.f. Hal. 1847, p. 180, no. 13, may 

 possibly be a variety of this species. Although described as "nitida, laevigata," 

 it is said to have 13 longitudinal ribs, gathered above into obsolete nodules, and 

 decussated below with lirse. White lines ascend the spire. The mouth is oblong, 

 the labrum internally lirate, and the labium not callous. 



