Camallanid Nematode from Hawaii — Noble 
363 
Fig. 5. The anterior ovary, oviduct, and seminal 
receptacle. 
(with a large sinus nucleus) that opens to the 
exterior by a short excretory duct (Fig. 9). The 
vulva is located just anterior to the middle of 
the female body, and the vagina extends pos- 
teriorly, for about 1.3 mm, to the uterus (Fig. 
10). The distal portion of the vagina has a 
thick, muscular wall and is about 0.4 mm long. 
DISCUSSION 
A number of copepods collected in the tide- 
pools with Istiblennius zebra were examined for 
larval stages of the parasite, but no larvae were 
Fig. 6. Posterior end of a male worm, ventral 
view. Note particularly the number and arrangement 
of papillae and relative sizes of the spicules. 
