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TaNnaornAMPHusS Ward, 1918 
Neoechinorhynchus, in part; ( = Neorhynchus = Eorhynchus). 
Generic Diagnosis —Neoechinorhynchidae of small to medium size, 
with cylindrical proboscis several times longer than wide. Proboscis 
armed with about sixteen longitudinal rows of hooks. Rows frequently 
incomplete and imperfect. Cement gland of type characteristic of the 
family. F 
Type species, Tanaorhamphus longirostris (Van Cleave, 1913). 
TANAORHAMPHUS LONGIROSTRIS (Van Cleave, 1913) 
(Pl. XXVII, Fig. 38, 34, 35) 
Neoechinorhynchus longirostris (Van Cleave, 1913). 
Body robust, with posterior extremity slightly flexed ventrad. Pro- 
boscis when fully extended inclined toward ventral surface at conspicuous 
angle. Females average about 6 mm. in length and have a diameter of 
about 0.63 mm. Males average + mm. in length and have a maximum 
diameter of 0.47 mm. Proboscis cylindrical, 0.5 mm. long, and with a 
diameter of 0.15 mm. Hooks rather irregularly arranged in about sixteen 
to twenty longitudinal rows with about ten hooks in each row. Largest 
hooks near anterior end of proboscis, about 54 w long. A few hooks 
near the base of the proboscis about 16 » long. Cement gland with sixteen 
giant nuclei. Embryos within body-cavity of gravid female 27 » in length 
by 8 to 10 » in diameter. 
Type host, Dorosoma cepedianum (LeS.) ; type locality, Illinois River 
at Havana, Illinois. 
EHuropEaN SPECIES 
REEXAMINATION OF THE TyPES OF NV. agilis (Rudolphi) 
European representatives of the genus Neoechinorhynchus have been 
characterized by European parasitologists in widely different descriptions. 
Attempting to use these definitions of species in studying members of the 
same genus from North American hosts, the present writer found the 
characterizations so diverse that it was difficult to determine whether 
the conflicting data represented individual variability within the species 
or resulted from inaccurate observations and erroneous identification. 
The records of each of a number of the investigators are so inconsistent 
that tabulated comparisons of the data when considered alone afford 
practically no key to the solution of the problems of specific identity. 
Fortunately, through the efforts of Professor Henry B. Ward, the writer, 
in 1913, had the rare good fortune to secure from the Berlin Museum, 
for examination, two “type” specimens of NV. agilis (Rudolphi). A com- 
parison of these with the descriptions of European investigators and with 
other specimens from European hosts constitutes the basis of the dis- 
cussion which follows. i 
