TETHYS—ANTILLEAN, Ue 
Shell of the usual form, very thin, and provided at the beak with 
a strong raised plate above, which is not found in European species. 
Near Santa Cruz, Teneriffe, Canaries (Orb.). 
Var. eQUOREA Heilprin. PI. 35, figs. 33, 34, 35. 
“Length about 42 inches. Body broadly oval, with a moderately 
elongated neck ; tentacles cylindrical, slit at the extremity ; buccal 
lobes broad, infolded ; opercular cavity on a slightly raised papilla” 
Swimming lobes very ample, free, united behind only at their insertion 
far back on the foot, which seems short posteriorly. Right edge of 
mantle deeply sinused at its posterior third, with a short excurrent 
siphon. Genital orifice slightly in front of, and below the anterior 
insertion of gill. Opal-gland with a single orifice about 6 mill. 
back of genital orifice. 
Color (in alcohol) light olive-gray, with very sparsely scattered 
irregular and unequal rings, traced in narrow black lines, and rang- 
ing from 3 to 5 mill. diam. There are also a few irregular black 
lines. Insides of swimming lobes and the mantle unicolored brownish- 
drab, free from markings, except for a couple of small black blotches 
within left lobe. 
Shell with a moderately strong layer of lime at the apex, thick- 
ened, calloused, and refleced backward in an erect plate (somewhat 
like a Pholas valve); outer layer yellow, membranous ; posterior 
sinus rather deeply concave, nearly half the shell’s length, and form- 
ing an angle with the outer lip. Leagth about 42 mill. 
Bermuda, in shallow water, south side of Castle Harbor, opposite 
Tucker’s Town. 
The above description is from the type collected by Professor 
Heilprin. It is considerably contracted and the shell has been re- 
moved. ‘The original description was also from the alcoholic (not 
the living) animal, the length being supplied from memory. As 
Heilprin remarks, this form differs from dactylomela and ocellata in 
lacking the markings on the mantle and the insides of swimming 
lobes ; moreover in this individual the black circles are very few in 
number and delicately outlined, and the swimming lobes are not 
violet bordered. As it was not described living, no complete com- 
parison can be made with d’Orbigny’s circumstantial account of 
ocellata. The identity of the Bermuda Ap/ysia commented upon by 
Dobson, that collected in the Bahamas by Dr. Dolley, and the A. 
schrammiu of Deshayes, with the present form remains problematic 
