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PACIFIC SCIENCE, Vol. XIX, October 1965 
FIG. 6. Gnathophausia gracilis, young male specimen of 41 mm. (From Sars, 1885.) 
with a completely formed brood pouch taken 
by the Dana also comes from the Gulf of 
Panama and measures 49 mm body length. Fage 
also points out that females of this size from 
the Caribbean Sea have only rudimentary ooste- 
gites and reach their sexual maturity at a larger 
size. The large female specimen taken from the 
Gulf of Bengal (Wood-Mason, 1891), measur- 
ing 92 mm total length, had incompletely de- 
veloped brood lamellae which measured only 3 
mm in length. 
None of the 5 large females of greater than 
100 mm body length from the Scripps collec- 
tions possessed a completely formed brood 
pouch. 
Gnathophausia zoea Willemoes-Suhm, 1875 
Gnathophausia Willemoesi G. O. Sars 1885 
Sarsi Wood-Mason, 1891 
cristata Illig 1906 
Only 2 specimens of Gnathophausia zoea ( 1 
male and 1 female) were found in the Scripps 
1950-53 collections. Both were taken at Station 
H 5 2-404, located just south of the equator at 
1°43'S, 89°52'W to 1°49'S, 90°00'W. The 
depth of the haul was 1016 m, over a bottom 
depth of 2560 to 2972 m. In addition 4 other 
specimens of Gnathophausia (all G. gracilis) 
were taken at this station, which was occupied 
during the time interval from 1944 to 0145 
hours on August 8-9, 1952. The female G. zoea 
measured 48 mm body length (approximately 
70 mm including the rostrum. The male meas- 
ured 41 mm body length (67 mm with the 
rostrum). This species is rarely taken off the 
west coast of North America. 
Gnathophausia zoea has a wide horizontal 
distribution, occurring from the Arctic Circle 
to the Equator. It is especially widespread in 
