HYDROIDS OF THE WOODS HOLE REGION. 
373 
Dipurena conica A. Ag. 
(North American Acalephse, p. 181.) 
Bell a rounded cone. Marginal tentacles 4, rather short; each with a rounded knob on the distal 
end and a pigmented spot and eye-speck at the base. Proboscis long, when fully extended reaching 
far below the rather broad velum, but capable of great retraction; attenuated proximally and swollen 
distally; mouth plain, without mouth tentacles. Radial canals 4, slender. Young specimens are 
almost globular in form. 
Colors . — Distal and proximal ends of tentacles reddish. Eye-specks black. 
Distribution . — Naushon (A. Agassiz). 
I have not seen this species; the above description is condensed from that of Dr. A. Agassiz. 
81. Si/ncorynemirabilis (Ag.) 
A. 
B. 
82. 
A. Lateral view. 
Ectopleura nchracea A. Ag. 
B. Aboral view. 
Ectopleura ocb.racea A. Ag. Fig. 82. 
(L. Agassiz, Cont. Nat. Hist. U. S., vol. iv,p. 343.) 
Bell longer than broad, subpyriform in shape, the upper end being the smaller; surface orna- 
mented by eight meridional bands of nematocysts, a band originating on each side of each tentacle 
base and passing directly over the surface of the bell to its apex. Tentacles 4, short, usually carried 
so closely coiled as to appear like mere knobs. Proboscis terete, not reaching to the bell opening, and 
ending in a simple mouth. Radial canals 4. 
Colors . — Manubrium bright yellow proximally and distally, the middle part being rose pink. 
Tentacular bulbs ochraceous, with a red eye-spot on each. 
Distribution . — Abundant at Newport in August. Woods Hole. Probably common throughout 
the region discussed in this work. 
