PLATE XXVIII * 
Neoechinorhynchus agilis 
(Fig. 36-39 illustrating variability in proboscis and in hook-length) 
Fig. 36. Hooks from a long-hooked individual (male) from the collection of 
Parona: (a) hook from terminal circle; (b) hook from middle circle; (c) hook 
from basal circle,—all in full profile. 
Fig. 37. Surface view of proboscis of a typical long-hooked individual from 
collection of Parona. In this figure and in Fig. 39 the hooks on the extreme back 
of the proboscis are omitted. Roots of hooks, shown in broken outline, lie behind 
the median vertical plane. 
Fig. 38. Hooks from short-hooked individual (male) from the collection of 
Monticelli. Letters have same significance as in Fig 36. 
Fig. 39. Proboscis of a typical short-hooked individual from above collection. 
Fig. 40. Proboscis. (Copied from Porta—1905, Pl. I, Fig 12. Surface-shading 
omitted.) 
Fig. 41. Proboscis. (Copied from Stossich—1885, Fig. 19.) 
Fig. 42. Proboscis of 1179B—an alcoholic specimen from “‘type” material of 
Rudolphi. 
Fig. 43. Proboscis of 1179A—alcoholic specimen from same material. 
Fig. 44. Embryo from body-cavity of gravid female from collection of 
Monticelli. 
* Scale indicating magnification of Fig. 44 has a value of 0.01 mm.; all other 
scales in the plate have a value of 0.1 mm. 
