td Me Pir oy ocak TA ee ee 
. ; ns Seertl ris. > Baa 4 
Me, aot 
‘>; s 
4 
202 THE CHICAGO ACADEMY OF SCIENCES. 
tive orifice on the right side, behind and below the eye-pedun-. 
cle. Other orifices as described in the genus. 
Length, 59.00; width, 10.00 mill. 
Yaw: Arched, ends blunt or slightly rounded; cutting 
edge with a rounded median projection; anterior surface 
covered with both transverse and vertical lines. The jaw is 
very thick (Fig. 46, J). ; 
Radula formula: 33+2%!+1+421+35 (56—1—56); central 
tooth with a very long and narrow base of attachment, some- 
what widening at the lower extremity and with parallel lines 
Fie. 46. 
Radula of PHILOMYCUS CAROLINENSIS Binney. (Original.) c, cen- 
tral tooth; 1, first lateral; 12, twelfth lateral; 24, twenty-fourth marginal; 
25, twenty-fifth marginal; 35, thirty-fifth marginal; J, jaw. 
of reinforcement on the lower portion; reflection about one- 
fourth to one-third the length of the base of attachment, with 
a short, stout cusp which bears a blunt cutting point; lateral 
teeth of same type, but asymmetrical, the reflection and cut- 
ting point longer, and the superior border with a peculiar tri- 
lobed form; the outer laterals have a’single small, rather sharp 
outer cusp; marginal teeth a modification of the laterals, the 
