352 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



Metulellavenusta (Sowerby) 



Columbdla venustajiowh., Q. J. Geol. Soc. vi, 1849, p. 46, pi. 9, fig. 6. 

 Metulella venusta Sowb., Gabb, Tr. Am. Philos. Soc. xv, 1873, p. 206. 



This species reaches a length of 30 mm. It is the type of the genus 



Metulella. 



Nassaria isthmica Bose var. elongata Toula. Jahrb., k. k. Geol. 



Reichsanst 1911, pi. 29, fig. 8, appears to be a related Metulella. 



Metulella fusiformis Gabb. Plate XVI] 1, fig. 16. 



Metulella fusif or mis Gabb, Proc. A. N. S. Phila. 1872, p. 270, pi. 11, fig. 3 

 (Feb. 11, 1873); Tr. Am. Philos. Soc. xv, 1873, p. 206. 



The embryonic shell is like that of the following species. Subse- 

 quent whorls have many narrow, rounded vertical ribs crossed by 

 somewhat flattened but prominent spiral cords, of which there are 

 five between sutures. There is a low swelling behind the outer lip. 

 Suture is somewhat channeled. 



Length 18.6, diam. 6 mm.; 9-2- whorls. 



Type no. 3216 A. N. S. P.; 5 other specimens. 



Metulella dominicensis Pil.s. and .lohns. Plate XVII J, fig. 18. 



Proc. A. N. S. Phila., 1917, p. 169. 



Perhaps not distinct from M. williamgabhi Maury, but that is de- 

 scribed as having "spiral striae faint, obsolescent" which is not the 

 case with our two specimens, in which the spirals are strongly de- 

 veloped. 



MURICIDAE. 



Murex (Chicoreus) brevifrons Lamarck. 



Murex brevifrons Lam., An. sans Vert, vii, 1822, p. 161. 



Murex (Chicoreus) megacer us Sby. Gabb, Tr. Am. Philos. Soc. xv, 1876, p. 



202. (Not of Sowerby). 

 Murex cornurectus Guppy, Q. J. Geol Soc. xxxii, 1876, p. 521, pi. 28, fig. 4. 



There appears to be no character distinguishing the Miocene 



specimens from the recent. Ten specimens, no. 3256. 



Murex rufus compactus Gabb. Plate XXVIII, fig. l. 



Murex {Pleronotus) compactus Gabb, Tr. Am. Philos. Soc. xv, 1873, p. 202. 



This differs from the recent M. rufus in being much thicker, the 

 frondose structure of the varices is more compact, forming almost 

 solid varices squamose in front. Only one tubercle is present be- 

 tween the varices on the last two whorls, two on the preceding whorl. 

 The greater number of recent specimens have two intervariceal 

 tubercles. 



Length 56.4, diam. 32.3 mm. 



Type and four other specimens are no. 3258 A. N. S. P. 



