PART I. 



Notes and Descriptions of Species. 



In univalves herein described, the term "longitudinal" is understood 

 to be from apex to canal and "transverse' at right angles to this direc- 

 tion. The figures are all either natural size or the true dimensions are 

 indicated with each. 



GASTROPODA. 

 MUREX ANGELUS, Aldr. PI. 2, fig. 2. 



Murex angelm, Aldr. J. C. S. N. H., July, 1885, p. 145. PL 2, 

 fig. 2. 



MUREX MATTHEWSENSIS, n. sp. PL 3, fig. 15. 



Shell triangular, whorls probably four ; angular, smooth between the 

 varices; varices three, longitudinal, prominent ; spines of the body whorl 

 elongated and curved upward, the one at the angle of the aperture 

 nearly closed ; body whorl angulated on upper part, the other whorls 

 rounded ; aperture ovate, outer lip thick with a foliation at the junc- 

 tion with the body whorl running from the spine to the beak ; inner lip 

 smooth with a slight lamina ; beak short ; canal rather wide. 



Locality. Matthews' Landing, Ala. 



Differs from M. moru'us, Con., in having no spines between the varices 

 at the shoulder of the body whorl, and has no crenulations on the edge 

 of the outer lip. 



