374 



BULLETIN OF THE UNITED STATES FISH COMMISSION. 



Pennaria tiarella McCr. Fig. 84. 

 (Proc. Elliott So., 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. 



D'utrilmtion. Common in shallow water throughout the Woods Hole region, especially in the 

 flatter part of the summer. Growing profusely on the piles of the wharf at Woods Hole and on the 



eelgrass nearby. 



Hydrichthys mirus Fewkes. 

 (Bull. Mus. Comp. Zool., vol. xin, No. 7, p. 22-1.) 



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, Sertola zonata, 

 which was brought into Dr. Alexander Agassiz's laboratory at Newport. 



I have not seen this species, and the above description is condensed from that of the original 

 describe!-. 



N.Y Dytmorphosa/ulffHratlt A. Ag. \. Lateral view. H. Ventral view. 



Dysmorphosa fulgurans A. Ag. Fig. 85. 



/ l North American Aealepha-, p. 163.) 



;. Stylaftls kooperiUgetiooe 



(after siyvrt'uos ). 



Bell ovoid, its surface having a granulated appearance. Marginal tentacle* 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 halfway to the bell opening, and ending with four mouth 

 tentacles furnished with terminal rounded batteries of nematocysts. Specimens secured in August 

 had young medusa? growing on the upper part of the proboscis, and these themselves often show 

 budding medusa; 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 hooperii Sigerfoos. Fig. 86. 

 (American Naturalist, vol. xxxm, No. 3&4, 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. 



