374 
BULLETIN OP THE UNITED STATES FISH COMMISSION 
Pennaria tiarella McCr. Fig. 83. 
(Proc. Elliott Soc., vol. i, No. 1, p. 153.) 
Bell very deep, regularly elliptical in outline. Marginal tentacles 4, rudimentary. Proboscis 
oblong ovoid, with both ends constricted, not reaching velum; mouth opening not apparent. Radial 
canals 4, accompanied with lines of dark pigment. 
Colors. — Manubrium and lines over radial canals deep pink, the latter being darker and more 
brilliant. 
Distribution. — Common in shallow water throughout the Woods Hole region, especially in the 
latter part of the summer. Growing profusely on the piles of the wharf at Woods Hole and on the 
eelgrass near by. 
Hydrich.th.ys mirus Fewkes. 
(Bull. Mus. Comp. Zool., vol. xm, No. 7, p. 224.) 
Bell oval, nearly spherical, its surface dotted with nematocysts. Marginal tentacles 2, when first 
liberated, afterwards 4. Radial canals 4, very broad, bandlike. Proboscis cylindrical, not reaching 
the broad velum. The tentacular bulbs are without eye-spots. 
Colors. — Proboscis orange and yellow. Tentacular bulbs reddish. 
Distribution. — The type specimens were liberated from a colony growing on a fish, Seriola zonata, 
which was brought into Dr. Alexander Agassiz’s laboratory at Newport. 
1 have not seen this species, and the above description is condensed from that of the original 
describer. 
Dysmorphosa fulgurans A. Ag. Fig. 84. 
(North American Aealephse, p. 163.) 
Bell ovoid, its surface having a granulated appearance. Marginal tentacles 8, rather stout, and 
held somewhat stiffly, each with a bulbous expansion with a distinct eye-spot at its base. Proboscis 
short, not reaching much more, than half way to the bell opening and ending with four mouth 
tentacles furnished with terminal rounded batteries of nematocysts. Specimens secured in August 
had young medusae growing on the upper part of the proboscis, and these themselves often show 
budding medusae of still another generation. Radial canals 4. 
Colors. — The pigment spots at the bases of the tentacles are bright orange red. 
Distribution. — During the summer, throughout the Woods Hole region. Agassiz says in reference 
to this species that it is “sometimes so abundant that the whole sea, when disturbed, is brilliantly 
lighted by the peculiar bluish phosphorescent color which they give out.” 
Stylactis hooperi Sigerfoos. Fig. 85. 
(American Naturalist, vol. xxxin, No. 394, p. 801.) 
Bell ovoid. Marginal tentacles 8, rudimentary. Proboscis very large and broad, not reaching 
beyond the bell opening, greatly distended with sexual products at time of liberation, without mouth 
tentacles or mouth. Eye-spots absent. Radial canals 4. 
