Hawaiian Stomatopods — Townsley 
423 
Fig. 21. Gonodactylus guerini White, a. Right pars molaris of mandible and mandibular palp; b, c, right first and 
second thoracic appendages; d, right third and fourth thoracic appendages; e, right fifth thoracic appendage; 
/, left first abdominal appendage of male (endopod only). 
Evidently this species is quite common in 
deeper water because all other specimens have 
been taken at considerable depths. Apparently 
this species forms a considerable part of the 
diet of the tunas, inasmuch as the adults and 
larvae are often found in stomach contents. 
This indicates that this species is probably 
semiplanktonic, because the tunas feed in 
mid-water or at the surface. These stomato- 
pods certainly spend some time on the bot- 
tom because other specimens have been 
dredged from a rough substrate. 
DISTRIBUTION: Specimens have been re- 
ported from the Hawaiian Islands, the South 
China Sea, the East Indian Archipelago, and 
the Indian Ocean. 
Gonodactylus guerini White 
Figs. 20, 21^-/ 
Gonodactylus guerinii White, 1861^.* 43, pi. 7; 
1861A 480. 
Protosquilla guerinii Brooks, 1886: 75, pi. 16, 
figs. 1, 6. 
DESCRIPTION: Carapace rectangular, nearly 
as wide as long, slightly narrower anteriorly, 
anterolateral and posterolateral angles broadly 
rounded, lacking distinct carinae, gastric 
grooves well defined, cervical almost obso- 
lete. Rostrum quadrate, trispinous, covering 
ophthalmic somite. Eyes small, tubular; cor- 
nea bilobed, set transversely on stalk. Ischio- 
meral articulation of raptorial claw situated 
at a point in advance of proximal end of merus 
so that merus extends backward beyond the 
joint (Fig. 21c); ventral surface of merus lon- 
gitudinally grooved for not more than 0.75 
its entire length for reception of propodus; 
upper margin of propodus with a series of 
fine acute teeth; dactylus inflated at base, 
elongated into a single acute tooth, inner 
margin of dactylus serrated. First, third, 
fourth, and fifth thoracic appendages shown 
in Figure 21^, d, e. Mandibular palp present, 
three segments (Fig. 2\d). Free thoracic and 
abdominal somites laterally compressed, all 
lacking longitudinal carinae (indication of 
slight marginal carinae on first five abdominal 
somites); fifth through eighth thoracic so- 
mites exposed, slightly narrower than posterior 
width of carapace; posterior portion of fifth 
abdominal somite bears several rows of short 
spines, separated from smooth anterior part 
by a curved transverse line; sixth abdominal 
