HYDROIDS OF THE WOODS HOLE REGION. 
375 
Colors . — Not given by the original describer. The color of the 
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. 8(3. 
(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. 
Radial canals 4, broad and with transverse striae and edges which 
appear jagged or frayed out. 
Colors . — Ovaries and tentacular bulbs yellow. 
Distribution . — Woods Hole, Mass. (Vinal Edwards). 
medusae while still attached in 
86. Turris vesicaria A. Ag. 
Turritopsis nutricula McCrady. Fig. 87. 
(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 reach to the bases of the mouth-arms. 
Radial canals 4. Velum broad. 
Colors. — Eye-spots red. Distal part of ovaries bright lemon yellow. 
Distribution. — Naushon. (A. Agassiz.) Woods Hole, Massachusetts. 
A. Lateral view of young. B. Lateral view of older specimen. 0. Ventral view of young. 
Nemopsis bachei Ag. Fig. 88. 
(Mem. Am. Acad. Sci., iv, p. 289.) 
Bell deep, ovoid, sometimes almost globular; thickness of bell substance greater than in most of 
preceding species, making bell cavity proportionally small. Tentacles in 4 bunches, the middle pair in 
