Hawaiian Stomatopods — ToWNSLEY 
421 
especially so in their native habitat on the 
reefs. Preserved specimens become opaque 
white or slightly yellowish, with the cornea 
of the eyes remaining very dark. 
It is difficult to say whether or not the 
specimens are mature and whether there is a 
distinct sexual dimorphism, because all spec- 
imens are females and none were ever collect- 
ed with egg masses. The absence of the gastric 
grooves and the very elongated antennal so- 
mites suggests that possibly they are in an 
immature stage. Edmondson (1921) states 
that the specimen in the Bishop Museum was 
kept alive for a month, during which time it 
molted with no apparent increase in size or 
change in structure. 
DISTRIBUTION: All Specimens collected have 
come from dead coral heads on Waikiki Reef, 
Oahu. 
Odontodactylus hanseni (Pocock) 
Figs. 18, 19 a- f 
Gonodactylus hansenii Pocock, 1893: 477, pi. 
20, figs. 3, 36. 
Odontodactylus latirostris hondiddilt, 1907: 212, 
pi. 22, figs. 3, 3a. 
DESCRIPTION: Carapace longer than great- 
est breadth, slightly narrower anteriorly than 
posteriorly, with distinct gastric grooves, cer- 
vical groove wholly absent, longitudinal cari- 
nae lacking, anterolateral and posterolateral 
angles unarmed and rounded. Anterior margin 
of rostrum evenly rounded, twice as broad as 
long. Ophthalmic somite exposed, dorsal 
process deeply excavate anteriorly. Eyes large, 
globular, corneal diameter 0.25 to 0.5 the 
length of carapace, excluding rostrum (Fig. 
18). Ischio-meral articulation of raptorial claw 
situated at a point in advance of proximal end 
of merus (Fig. 19^) ; ventral surface of merus 
grooved longitudinally for not more than 0.6 
its length for reception of propodus; upper 
surface of propodus not pectinate; dactylus 
inflated at base, armed with 9-11 teeth on its 
inner margin. Propodus of third, fourth, and 
Fig. 19. Odontodactylus hanseni (Pocock). a,b,c,d,e, 
Right first, second, third, fourth, fifth thoracic append- 
ages; /, right first abdominal appendage of male. 
fifth thoracic appendages somewhat shield- 
shaped (Fig. I9c-e). Mandibular palp of three 
segments. Free thoracic and abdominal so- 
mites laterally compressed, distinct longitudi- 
nal carinae present only on sixth abdominal 
somite; sixth, seventh, and eighth thoracic 
somites exposed, lateral borders rounded; pos- 
terolateral angles of fourth and fifth abdominal 
somites ending in a short acute spine; sixth 
abdominal somite with four pairs of longitu- 
dinal carinae, one submedian pair ending in 
spines, one intermediate pair without spines, 
one second lateral pair ending in spines, one 
