Camallanid Nematode from Hawaii — Noble 
361 
TABLE 1 
Measurements of Spirocamallanus istiblenni 
MALE 
(mm) 
FEMALE 
(mm) 
Body length 
14.900 
21.500 
Body width 
0.221 
0.326 
Anus to posterior end 
0.166 
0.177 
Excretory pore to anterior end 
0.400 
0.400 
Vulva to anterior end 
— 
8.200 
Buccal capsule, length 
0.075 
0.077 
Buccal capsule, width 
0.072 
0.077 
Esophagus (muscular) length 
0.325 
0.397 
Esophagus (glandular)' length 
0.485 
0.588 
Nerve ring to anterior end 
0.208 
0.220 
Right spicule, length 
0.274 
— 
Left spicule, length 
0.184 
— 
Number preanal papillae 
6 
— 
Number postanal papillae 
3 
— 
Anterior ovary length 
— 
6.100 (max. 10.0) 
Posterior ovary length 
— 
0.850 (max. 01.0) 
Mature ova in anterior ovary 
— 
0.011 X 0.015 
Ova in posterior ovary 
— 
0.008 X 0.010 
papillae pattern (six preanal, three postanal) 
in the male, the spicule length ratio of 3:2, the 
female: male body length ratio of 1.44:1, and 
the arrangement of the anterior excretory canals. 
These features, and others, will be discussed 
briefly. 
The mouth is circular, without lips. An en 
face view of a preserved specimen shows that 
the anterior surface of the buccal capsule pos- 
sesses eight lateral projections, and is surrounded 
by inconspicuous folds (Fig. 1). The orange- 
brown buccal capsule (Fig. 2) is lined with 13 
or 14 spiral thickenings. Between the buccal 
capsule and the body wall are located four 
elongated buccal sinuses, two dorsal and two 
ventral in position. These sinuses are probably 
Fig. 1. En face view. The outer surface around 
the mouth is smooth. 
Fig. 2. Lateral view of head to show the buccal 
capsule and position of buccal sinuses. 
