"K. 



EXPLANATION OF PLATES 



Figures on plates 1 and 2 are intended primarily to represent specific 

 differences in transparency and general appearance. Drawings were made 

 on Boss stipple board, nos. 5 and 8, black. 



All figures drawn with the camera lucida. 



PLATE 1 



Fig. 1. Sagitta enflata Grassi. X 3. 



Fig. 2. Sagitta hexaptera d'Orbigny. X 3. 



Fig. 3. Sagitta lyra Krohn. X 3. 



Fig. 4. Sagitta serratodentata Krohn. X 3. 



Fig. 5. Sagitta bipunctata Quoy et Gaimard. X 3. 



Fig. 6. Sagitta plaul-tonis Steinhaus. X 3. 



ABBREVIATIONS 



col. — collarette. 

 int. — intestine. 

 ov. — ovary. 



seiz. j. — seizing jaws. 

 sem. V. — seminal vesicle. 

 vent. g. — ventral ganglion. 



[172] 



