540 
REPORT OF COMMISSIONED OF FISH AND FISHERIES. 
Fig. 23. 
Fig. 24. 
Fig. 25. 
Fig. 26. 
Fig. 27. 
Fig. 28. 
Fig. 29. 
Fig. 30. 
Fig. 31. 
Fig. 32. 
Fig. 33. 
Fig. 34. 
Fig. 35. 
Fig. 36. 
Fig. 37. 
Fig. 38. 
Fig. 39. 
Fig. 40. 
Fig. 41. 
Plate III. 
Echinorhynchus attenuatus, sp. nov. 
Optical section of male ; specimen in glycerine, X 4| diameters. 
Anterior portion of proboscis, X about 200 diameters. 
Hooks isolated, somewhat more highly magnified. 
Portion of surface of proboscis treated with potassic hydrate. 
Longitudinal section of body wall stained with borax carmine, magnified 
about 350 diameters; a, cuticle; b, c, granulo-fibrous layers of subcuticula; 
d, vascular layer of subcuticula; e, circular muscle layer ; /, longitudinal 
muscle layer; g, lumen of vessel of vascular layer; h, intra-fascicular 
substance of the longitudinal muscle layer with nucleus. 
Longitudinal section of anterior tumid portion of body wall, borax carmine 
stain, magnified about 270 diameters; a, cuticle; b, granulo-fibrous lay- 
ers of subcuticula; c, vascular layer of subcuticula here reduced to 
small dimensions, its place being occupied by the homogeneous granular 
substance d, which fills the space between the vascular layer and the 
circular muscle layer, and gives rise to the anterior tumidity character- 
istic of this species ; e, circular, and/, longitudinal muscle layers ; h, h, 
nuclei of longitudinal muscle layer. 
Section, nearly longitudinal, posterior extremity of female, borax carmine 
stain, magnified about 210 diameters; a, cuticle; b, granulo fibrous lay- 
ers of subcuticula; c, vascular layer of subcuticula with radial fibers; 
d, circular muscle layer; e, longitudinal muscle layer;/, uterus; g, 
inner, and h, outer sphincter muscle of uterus ; i, nucleus of longitudinal 
muscle layer; k, nucleus of outer sphincter muscle of uterus; l, lumen 
of vessel in vascular layer ; m, ovarian mass in body cavity. 
Ovarian mass from body cavity, X about 900 diameters. 
Sketches by the author. 
Plate IV. 
Echinorhynchus pristis, Rudolphi. 
Proboscis and anterior part of body of female from Tyiosurus caribbceus ; 
sketch from living specimen, X about 27 diameters. 
Base of proboscis of same, X about 200 diameters. 
Median region of proboscis of same, X about 200. 
Hooks from ventral side of proboscis, anterior end. 
Dorsal hook near base of proboscis. • 
Ventral hooks near base of proboscis. 
Hooks from basal circle. 
Figs. 34 to 37 have the same magnifications, viz, about 200. 
Spine from anterior part of body, X about 225 diameters. 
Var. tenuicornis. 
Hooks from proboscis of male from Tyiosurus caribbceus, X about 200. 
Hooks from proboscis of female from Lobotes surinamensis , X about 200. 
Portion of proboscis of male from L. surinamensis, X about 200. 
Fig. 31 from sketch by M. B. Linton, others by author. 
