Edmondson—Stomatopoda in the Bishop Museum 283 
In all Squillidae this complicated organ is borne on the termi- 
nal segment of the endopodite of the first abdominal appendage and 
consists of three distinct portions: first, the retinaculum or ex- 
ternal appendicular process (rm—fig. 1, a-e and g), which is 
medial in position, rounded proximally and pointed distally, with a 
flattened medial surface provided with rows of hooked spines which 
interconnect with those of the corresponding organ of the opposite 
appendage; second, the movable limb (m/—fig. 1, a-e and g¢) of the 
forceps of the organ, which projects at an angle across the surface 
of the endopodite, its free end, in most species, slightly curved and 
spoon-shaped; third, the fixed limb of the forceps (/i—fig. 1, a-e 
and g), which also extends at an angle across the endopodite and, 
in most species, terminates in a hook. 
Brooks*, Borradaile*, Chilton*, and others have figured and 
described the accessory organs of certain species of Squillidae. 
The characteristic features of the structure in additional species are 
presented in this report. 
Although the Squillidae are known to inhabit the tropical, 
subtropical, and temperate oceans, yet the greater number of them 
have been taken from the warmer seas. Some are apparently 
localized in their distribution or at least have not been reported 
from widely separated regions, and others within certain latitudinal 
limits are extensively dispersed throughout the Indian, Pacific, and 
Atlantic Oceans. 
A number of species of Squillidae are known to range con- 
siderably below the too-fathom line. Bigelow reports Squilla 
biformis as having been taken in Panama Bay at 85-259 fathoms, 
and the “Investigator” took Squilla leptosquilla in the Indian 
Ocean at 370-419 fathoms. The larger number of known species 
are, however, confined to shallow water where they burrow in 
the sand or conceal themselves in the crevices of dead coral. 
aRrooks Vi. Ko Op eit. PIs; 1,2) Fo) 15, 1886: 
*Borradaile, L. A., On some crustaceans from the South Pacific, 
Part 1, Stomatopoda: Proc. Zool. Soc. London, Pls. 5, 6, 1808. 
‘Chilton, C., Notes on the New Zealand Squillidae: Trans. New 
Zealand Inst., vol. 23, pl. 10, 1890; Revision of the New Zealand Stomato- 
poda: Trans. New Zealand Inst., vol. 43, p. 136, tig. 2, IQro. 
esr 
