HYBROIDS OF THE WOODS HOLE REGION. 



375 



Colors. Not given by the original describer. The color of the medusae while still attached in 

 specimens preserved in formalin is light salmon. 



Found growing on a live gasteropod, Ilyanassa. Collected near 

 Woods Hole by Mr. Waldron. Type from Cold Spring Harbor, L. I. 



Turris vesicaria A. Ag. Fig. 87. 

 (North American Acalephse, p. 164.) 



Bell dome-shaped, surmounted by a subglobular or subconical 

 body, which appears to be hollow. Tentacles numerous when full 

 grown, but one good-sized specimen, apparently almost mature, has 

 only 8. Each tentacle is dilated at the base into a tentacular bulb 

 that bears an eye-spot. Proboscis short, ending in four frilled mouth 

 arms. Ovaries, forming large complicated frills, extending down on 

 either side of the radial canals and connecting at their proximal ends. 

 Eadial canals 4, broad and with transverse strise and edges which 

 appear jagged or frayed out. 



Colors. Ovaries and tentacular bulbs yellow. 



Distribution. Woods Hole, Mass. (Vinal Edwards). 87. Turris resicaria A. Ag. 



A. Lateral view of young. 



K8 jTm7oj**As it nh'ii'iilit MK'r. 

 B. Lateral view of older specimen. 



C. Ventral view of yonng. 



Turritopsis nutricula McCrady. Fig. 88. 



(Proc. Elliott. Soc. vol. I, No. 1, p. 127.) 



Bell hemispherical ovoid, or sub-conical. Marginal tentacles varying in number according to age, 

 from 4 to 24 in specimens examined, and held somewhat stiffly, each with a tentacular bulb bearing an 

 eye-spot at its base. Proboscis not reaching to the bell opening, and ending in four small mouth 

 tentacles bearing distal clusters of nematocysts. The genital products are contained in four large oval 

 masses around the proximal part of the proboscis and reaching to the bases of the mouth-anna. 

 .Radial canals 4. Velum broad. 



Colors. Eye-spota red. Distal part of ovaries bright lemon yellow. 



Distribution. Naushon. (A. Agassis.) Woods Hole, Massachusetts. 



