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AGASSIZ AND MAYER: ACALEPHS FROM THE FIJI ISLANDS. 169 
Specific Characters. The bell is slightly flatter than a hemisphere, and is 
9 mm. in diameter. There are 16 short tentacles with large basal bulbs. In 
addition to these there are about 80 short cirri upon the bell margin. There 
are 32 otocysts (2 between each successive pair of tentacles). The otocysts 
each contain 5-9 otoliths. The velum is well developed. There are 4 straight, 
narrow radial canals, upon the lower regions of which the gonads are devel- 
oped. The proboscis is short and flask-shaped, and cruciform in cross section. 
There are 4 prominent, fimbriated lips. The entoderm of the tentacle bulbs 
and of the proboscis, and the ectoderm of the gonads, are dull yellow. The 
entoderm of the radial canals is grass-green, 
Suva Harbor, Fiji Islands, in January. 
Polycanna purpurostoma, nov. sp. 
Plate 8, Figs. 26-28. 
Generic Characters, Polycanna, Haeckel, 1879. Æquoridæ with numerous 
simple radial canals. Proboscis very wide; the mouth opening surrounded by 
numerous small lappets. Gonads upon the radial canals. 
Specific Characters. The bell is lens-shaped, and about three times as broad 
as itis high. It is about 30 mm. in diameter. The gelatinous substance of the 
bell is very thick, so that the cavity is shallow. There are 16 short tentacles 
with wide basal bulbs. In addition to these there are about 120 very small 
tentacles, or papillæ, upon the margin of the bell (see Fig. 28). There are 
about 100 otocysts, each one of which contains two small, spherical otoliths. 
The velum is prominent. There are about 100-120 straight, narrow radial 
tubes, upon the lower halves of which the gonads are developed. The pro- 
boscis is very wide and shallow, and the mouth opening large; there are 100- 
120 small lappets surrounding the mouth (M., Fig. 27). The entoderm of the 
basal bulbs of the tentacles is flesh colored. The gonads are slaty blue; and 
the proboscis, especially in young Medusa, is pink. In old individuals it is 
usually hyaline. 
Jommon among the Fiji Islands in December. 
Rhegmatodes floridanus, L. Acassız. 
Rhegmatodes floridanus, Agassiz, L., 1862, Cont. Nat. Hist, U. S. A., Vol. IV. p. 361. 
A Medusa that we are unable to distinguish from Rhegmatodes floridanus 
of the Bahamas and Gulf of Mexico was met with occasionally in the Fiji 
Islands. 
Hirene kambara, nov. sp. 
Plate 8, Fig. 29. 
Generic Characters. Eirene, Eschscholtz, 1829, Eucopide with numerous 
otocysts and tentacles, and sometimes also marginal cirri. There is a distinct 
