MAZATLAN UNIVALVES ^1 



interstltiis latis, spiraliter mx striulatis, hasi vix striata ; 

 aperturd suhpyriformd ; lahro acuta, secundum castas vtx 

 sinuato : labio inconspicico. 

 Mangelia acuticostata, Proc. Zool. Soc. June, 1856. 



Eesembles M. neglecta, C. B. Ad. wliicli however is de- 

 scribed as having an elevated spiral line on the middle of the 

 whirls, and basal strife. Lo7ig. 'ISS, lomj. spir. -074., lat.'Qfl, 

 div. 35". 

 ^a6.— Mazatlan ; 1 sp. off Spondylus ; rpool Col. 



Tablet 1914 contains the specimen. 



Genus CITHAEA, Schwn. 



i:ss. no. 106, 1817.— Wbodw. Man. p. 115. 



Cythara, H. Sf A. Ad. Gen. vol. i. p. 98. 



Mangelia, Rve. Conch. Jc..(non Eisso) maxima pars. 



474. PCiTHAEA , sp. ind. 



Tablet 1915 contains a broken shell with 7 long, straight, 

 sharp ribs and very crowded spiral strife ; mouth sublinear ; 

 labrum thickened, 'except at the notch. There is no trace of 

 teeth within. 

 J2«6.— Mazatlan ; 1 sp. off Spondylus ; L'pool Col. 



Family CONID^. 



Genus CONUS, Linn. 



The Mazatlan Cones do not appear to be rich either in 

 species or individuals ; nevertheless, if not valuable to collec- 

 tors, they were interesting through possession of the epidermis, 

 and often of the opercula. These are very small for the shell, 

 elongated and narrow ; with the apex terminal, usually decol- 

 lated, and often much broken. When repaired, as in other 

 families, it sometimes assumes the concentric type. 



475. CONUS EEGULAEIS, Sow. 



Conch, m. pi. 29, -f. 29, pi. 36, f. 45.— iEw. Conch. Ic. pi. 26, 

 sp. Vi&.—Lam. An. s. Vert. vol. xi. p. 132, no. 189.— .ff/ew. 

 Icon. Conch, p. 124, no. 103, pi. 23, f. 3, y*x.—Mke. in Zeit. 



