PLATE 7. 
Fig. 14. Do.aBeLua AGASSIZI, sp. nov. 
Fig. 1. Section transverse to long axis of mandible, about midway of its length ( 
fig. 5, m.); a, anterior or oldest border, the worn and broken rodlets borne on a thick bass 
b; c, posterior or youngest border of the mandible, the short rodlets being formed in a 
upon the distal ends of the epithelium cells, and progressively increasing in length fo d { 
one half the width of the mandible; d, thick striated cuticle overlying the rodlets, secrete 
epithelium of the upper side of the sulcus; e, connective-tissue and muscle-fibres of the int 
X 22. a ie 
Fig. 2. Detail of innermost portion of mandibular suleus; a, mandibular rodlets, cuti 
ferentiations upon the distal ends of the epithelium cells, e; c, epithelium of upper side of 
which secretes the thick stratified cuticle, d, filling the space above the rodlets in the sulcus 
fibres of the integument, many passing up through the basement-membrane and the com p 
connective-tissue f, to terminate among the epithelial cells (cf. Plate 8, fig. land 3). X 180. 
Fig. 3. One of the longest of the mandibular rodlets, from the middle region of the 
The rodlet is still in contact with the epithelium-cell which produced it, and shows dis 
tion into layers as well as fainter longitudinal striation. > 180. 
Fig. 4. A much shorter rodlet from a point toward the bottom of the sulcus, drawn : at 
magnification as the preceding figure. The basal cell is proportionately much larger. oe 
