EXPLANATION OF PLATE XVII. 

 Murex Shilohexsis Heilprin u>. 97). 

 p IG i. Front view of the 'type specimen, enlarged. 



Mcrkx Shilohexsis var. Burnsi Whitf. (p. 98). 

 F IG . 2. View of specimen described, enlarged. 



Caxtharus Cumberlaxdiaxus Gabb (p. 103). 

 Figs. 3, 4. Front and back views of an imperfect specimen, the beak of which had been injnred 



during life. 



5. Back view of a more elongated individual. 



6. Front view of Mr. G abb's type specimen. 



Fasciolaria Woodi Gabb (p. 98). 

 FIGS. 7, 8. Two views of the type specimen, natural size. 



Fasciolaria (Lyrosoma) sulcosa Conrad (p. 100). 

 FIGS. 9, 10. Two views of a small imperfect specimen, twice enlarged. 



Busycox scalarispira Conrad (p. 102). 

 Figs. 11, 12. Two views of the most perfect specimen observed. 



Buccinanops variabilis Whitf. (p. 107). 



Figs. 13. View of a young specimen. 



14 15. Two views of a larger specimen. 

 16, 11, 18. Views of three other specimens, showing variations of form; all fignrea enlarged. 



178 



