196 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE IX. 



Fig. 56. Anterior region of Peisidice aspera, gen. et sp. nov. Drawn 

 from life without camera lucida, but accurately as possible; X 20.25. 



F'g- 57- Jaws of the same. Seen in situ from ventral side, proboscis re- 

 tracted. Balsam preparation of entire worm; X 52.5. 



Fig. 58. Profile view, posterior aspect of a foot from middle of body of 

 the foregoing. In cedar oil; X 78.75. 



Fig. 59. A small portion of lateral margin of one of the fifth pair of elytra, 

 with six marginal "cilia." Glycerine preparation; transmitted light; X 300. 



Fig. 60. Anterior end of Sthenelais fusca , sp. nov., after removal of first 

 two pairs of elytra. The anterior pair of eyes are minute and forwardly di- 

 rected. Alcoholic specimen; about one-half grown; X 12.75. 



Fig. 61. Elytron from posterior region of body of Sthenelais fusca, left 

 side. The nerves in the unpigmented portion of elytron are very distinct. 

 Papillated on ventro-lateral region and margin. Glycerine preparation; 

 transmitted light; X 19.5. 



Fig. 61a. A small portion of margin of same elytron, showing fusiform 

 papillae. The nerves can be traced into some of these papillae; X 225. 



Fig. 61b. A small portion of upper surface of thirteenth elytron of the fore- 

 going, including one of the minute non-pigmented areas. The cuticular pig- 

 ment appears as rounded, amorphous masses. Glycerine; transmitted light; 

 X 225. 



Fig. 62. Right elytron of eighth pair of Sthenelais verruculosa, sp. nov., 

 showing the very numerous, small tubercles; X 12.75. 



Fig. 62a. A small portion of ventro-lateral margin of same elytron, show- 

 ing tubercles and marginal "cilia"; X 300. 



