PLATE 7. 



Fig. 1-4. DOLABELLA AQ.VSSIZI, Sp. nOV. 



Fig. 1. Section transverse to long axis of mandible, about midway of its length (c/. Plate 8, 

 fig. 5, 771.); a, anterior or oldest border, the worn and broken rodlets borne on a tliick basal eutieula, 

 b; c, posterior or youngest border of the mandible, the short rodlets being formed in a deep sulcus 

 upon the distal ends of the ejiithelium cells, and progressively increasing in length forward for about 

 one half the width of the mandible; d, thick striated cuticle overlying the rodlets, secreted by the 

 epithehum of the upper side of the sulcus; e, connective-tissue and muscle-fibres of the integument. 

 X 22. 



Fig. 2. Detail of innermost portion of mandibular sulcus; a, mandibular rodlets, cuticular dif- 

 ferentiations upon the distal ends of the epithelium cells, e; c, epithehum of upper side of the sulcus 

 which secretes the tliick stratified cuticle, d, filUng the space above the rodlets in the sulcus; h, muscle- 

 fibres of the integument, many passing up through the basement-membrane and the compact layer of 

 connective-tissue/, to terminate among the epithehal cells (c/. Plate 8, fig. 1 and 3). X 180. 



Fig. 3. One of the longest of the mandibular rodlets, from the middle region of the mandible. 

 The rodlet is still in contact with the epitheUum-cell which produced it, and shows distinct stratifica^ 

 tion into layers as well as fainter longitudinal striation. X 180. 



Fig. 4. A much shorter rodlet from a point toward the bottom of the sulcus, drawn at the same 

 magnification as the preceding figure. The basal cell is proportionately much larger. X 180. 



