532 REPORT OE COMMISSIONER OF FISH AND FISHERIES. 
Nos. 1 and 2 are from Tylosurus; No. 3 is from Lobotes. 
No. 2 is the single female individual whose proboscis agrees with those 
of the male specimens. There are about twenty spiral series of hooks. 
The hooks on the dorsal side are about 0.04 mra , and those on the ventral 
about 0.07 mm in length. About seven hooks can be counted in each 
spiral on a side. The hooks agree closely in form and nearly in size, 
though not in number, with those of the first group. The anterior part 
of the body is armed with a few scattering sagittate or triangular 
spines, as in the others. The genital aperture of No. 1, as in those typ- 
ical of the species, is a short distance from the posterior end, and appears 
to be stellate. This latter feature is one of the specific characters of 
Molin’s LJ. lateralis, It was not observed in the others. 
The males are smaller than the females. The two testes are oblong- 
elliptical. In one specimen they measured 0.9 mm and 0.7 mm in length, 
respective! 3 r , the anterior being the longer. The diameter of each was 
about 0.36 mm . The testes lie close together, one following the other, 
and are succeeded by the voluminous prostate glands and seminal 
receptacle. All these organs have a rich golden-brown color in the 
alcoholic specimens. 
In the preserved specimens the bodies of the males are strongly 
arcuate, and the proboscides have a tendency to assume the shape of 
an interrogation point. As in the females, the anterior part of the body 
for a distance of 1 or 2 millimetres is armed with a few sagittate or 
triangular spines. 
Two of the specimens from Tylosurus were bright orange-red in life, 
and the others were faintly tinged with orange. The red color appeared 
to be due to red globules in the fluid contents of the subcutaneous 
vascular system. 
The lemnisci are at least as long as the proboscis sheath ; in some of 
the males they are longer. 
The length of the female specimen from Lobotes was 13 mm inlife; 
length of proboscis, 1.24 mm ; length of longest hooks, 0.08 mm ; length of 
proboscis sheath, 3 mm ; length of sagittate spines on anterior part of 
body, 0.08 mm . The color of the female from Lobotes was yellowish- white. 
At the distance of 1.4 mm from the neck on the dorsal side there was an 
oval, orange- colored spot, 0.08 mm in diameter. The proboscis and an- 
terior fourth of the body of the male was bluish-white ; from the base 
of the proboscis sheath to the middle of the body, pinkish-white ; from 
the middle of the body to the posterior fourth, greenish-yellow ; the pos- 
terior fourth, canary-yellow. 
Habitat: Tylosurus caribbceus , rectum, Wood’s Holl, Massachusetts, 
July 27, 1886; Lobotes surinamensis , Newport, Rhode Island, August 
3, 1887. • 
