Hawaiian Stomatopods — Townsley 
431 
margin; abdominal somites and appendages 
distinctly adult in structure, gills on pleopods 
nearly fully developed, sixth abdominal so- 
mite with two well- developed submedian and 
two lateral spines; uropods with nine or ten 
movable spines along outer margin of exopod, 
spines of elongated basal portion changing 
relationship to one another so that in some 
specimens these two spines are nearly equal 
in length; telson with three distinct longi- 
tudinal carinae, median and two submedians, 
posterior margin with pair of movable sub- 
median spines bearing series of denticles be- 
tween them, pair of immovable intermediate 
spines with two denticles between them and 
submedian spines, pair of immovable lateral 
spines. 
The specimens now reach a maximum 
length of 20 to 25 mm. This developmental 
stage is very common in the plankton during 
the spring and summer months and occurs in 
both the inshore and offshore waters of Ha- 
waii. They may occasionally be found in the 
stomach contents of the yellowfin tuna, Neo- 
thunnus macropterus, and the skipjack, Katsu- 
wonus pelamis. 
STAGE 7 (Fig. 24c): There is little change 
in this form from the preceding stage. Ros- 
trum nearly adult in form, broader than long; 
eyes more tubular in shape; raptorial dactylus 
composed of single tooth, facies of other teeth 
on inner margin can be seen through chitin 
in some specimens. 
Individuals in this developmental stage 
have been taken in the plankton from Ka- 
neohe Bay, Oahu, and at Honolulu Yacht 
Harbor, Oahu. This indicates that the larvae 
are returning to the shallower, more pro- 
tected waters and are preparing to settle 
down on the bottom to complete their life 
cycle. 
Lysiosquilla sp.^ 
Fig. 25a 
Brooks (1886) has illustrated this antizoeal 
form and states that numerous specimens were 
taken by the "Challenger” at Honolulu, Both 
Brooks’s specimens and those at hand agree 
with those described by Claus (1872) from 
Messina. These very small larvae occur in 
great numbers in the plankton throughout 
the year. Due to their relatively small size 
(2.5 to 3.5 mm.) they are very often over- 
looked or cast aside as some unknown form. 
Although they lack the characteristic sub- 
chelate appendages, the eyes and telson have 
distinct stomatopod characteristics. These lar- 
vae represent the first larval stage of Lysio- 
squilla or Coronida, and because of their great 
abundance I am inclined to believe that they 
belong to Lysiosquilla which is apparently 
more abundant in Hawaiian waters than Coro- 
nida. There is no diagnostic character suffi- 
ciently developed to indicate conclusively the 
species to which these specimens belong, and 
none have ever been reared in captivity to the 
following stage. The carapace completely 
covers the animal from head to abdomen 
leaving only the eyes and telson exposed. 
There are five pairs of biramous thoracic ap- 
pendages present, the abdomen is only faintly 
segmented, and the pleopods are absent. This 
larval form gives rise to an erichthus in later 
stages. 
Lysiosquilla sp.^ 
Figs. 25b, c 
Nine specimens of this lysioerichthus stage 
were collected in a plankton tow in the Molo- 
kai Channel. In all respects this larval form 
represents the typical lysioerichthus. No spines 
between submedian and lateral spines on tel- 
son (Fig. 25c); raptorial propodus finely pec- 
tinate along upper margin, dactylus composed 
of single acute spine, not inflated at base, 
ischio-meral articulation terminal; all thoracic 
appendages present, propodus of third and 
fourth rounded and broader than long, fourth 
nearly twice as large as that of fifth; abdomen 
increasing in breadth posteriorly; pleopods 
all present, gills absent; uropods partially de- 
veloped, exopod and endopod both present, 
with basal portion elongated into two spines. 
