EXPLANATION OF PLATE VI. 



Fig. 1. Echinorhynchua sagitti/er sp. nov. Outline sketch of young, showing pro 



traded proboscis, neck, collar armed with sagittate spines, transverse 



rows of sagittate spines on the body, and, interiorly, tbe proboscis 



sheath, retractor muscles of same, the genitalia depending from sheath 



• of proboscis, enlarged 20 diameters. 



Fig. la. Hooks of proboscis, ventral side, enlarged about 150 diameters. 



Fig. 1/'. Hooks of proboscis, dorsal side, enlarged about l. r >0 diameters. 



Fig. lc. Sagittate spines from collar, enlarged about 150 diameters. 



Fig. Id. Sagittate spines from one of the transverse ventral rows on body, enlarged 

 about 150 diameters. 



FlG. h: Five contiguous hooks in one of the spiral series on the proboscis, enlarged 

 about 150 diameters. 



Fig. 2. Sketch of live specimen, somewhat flattened by the compressor, enlarged 

 12 diameters. 



Fig. 3. Eohinorhynchus proteus Westrumb. Portion of rectum of L'ovcus lineatus 

 (Striped Bass) with parasites attached, natural size. 



Fig. 4. Outline of an individual removed from its place of attachment, enlarged 'J 

 diameters. 



Fig. 5. Abnormal secretions in peritoneal covering of largo intestine of Hoccus 

 lineatus, to the inner coat of which numbers of these parasites were at- 

 tached, as shown in Fig. 3, natural size. 



Fig. 5a. One of the cysts shown in Fig. 5, cut open, exposing the calculus within, 

 natural size. 



Fig. 5&. Transverse section through one of the abnormal secretions, showing its con- 

 centric structure, natural size. 



Fig. C>. Portion of cystic duct of Cynoscion ret/ale with young Tetrabothria attached 

 to mucous lining, enlarged 3 diameters. 



Fig. 7. One of the specimens removed from its place of attachment, enlarged 12 

 diameters. 



Fig. 8. A young Tetrabothrium from intestine of same host, enlarged 12 diameters. 



Fig. ( J. Another from same habitat, flattened under compressor, enlarged 12 diame- 

 ters. 

 Figures 2, 3, 4,6, 7, 8, and 9 from life ; others from alcoholic or mounted specimens. 

 All figures made by Mrs. Edwin Linton. 



510 [58] 



