14 JIUSEILM, I'.l.'OOKl.YN INSTITUTK OK ARTS AND SCI K.VCRS. 



ovci- oacli (livcrticiiliiiM. Tlic iiuiiiuliriiuii in W. geraniifera is long and slen- 

 der wiiiie tliiit of \y. oniala is slioi-t and liroad; but these differences mny 

 be all due (o (he absence of sjienn ()i'<>\a in W. yemniifera. W. ornata is 

 abundant at ilie Bahamas and is occasionally found at the Tortu,i?as. W. 

 geniniifera is found at the Tortuiias and olT Ihe (^iroliua coast. 



Laodicea ulothrix, IIaeckel. 



Fi(j. 30, Plate IV. 

 Laodice ulothtix, Haeckel, 1879; Das System der Mednseu, p. 133, Taf. VIII., Fif^r. .0-7. 



Bell about 20 mm. in dianu'ter, and a little flatter than a hemisphere. 

 70-100 stiff tentacles about one-third as long as the bell-diameter. These have 

 their distal ends coiled tightly. The tentacle-bulbs are large and hollow, and 

 there is a dark broAvn ectodermal ocellus upon the inner (sub-umbrella) side 

 of each bulb, t^ome of the tentacle-bulbs show spur-like projections upon the 

 exumbrella side. Small sensory clubs and coiled cirri are scattered between 

 the tentacles. The cirri are usually sDinewhat less numerous than the ten- 

 tacles, while the clubs are about equal in nund)er to the tentacles. There 

 are no otoliths. There are four straight, narrow radial tubes. The manu- 

 brium is shoi't and cruciform in cross section, with four recurved lips. 

 The gonads are found on the four radial canals adjacent to the manu- 

 brium. The entoderm of the manubrium, gonads, and tentacle-bulbs is varia- 

 ble in color, being dull pink, brownish or greenish white. This medusa is 

 abundant at the Canary Islands, Tortugas, and Bahamas. 



Tiaropsis punctata, Maykr. 



Fig. 21, Plate III. 



Mater, A. G., 1900; Bull. Mus. Comp. Zo«l. at Harvard Coll., Vol. XXXVII., p. 49, Figs. 

 60-63, PI. 23. 



Tiaropsis diademata, Fewkes, J. W.. 1882 ; Bull. Mub. Comp. ZoiJl. at Harvard Coll., Vol. 

 IX., p. 277, PI. VII., Figs. 13-14 



Bell about 1 mm. in diameter, Iduntly cone-shaped or hemis])herical. Four 

 radially situated tentacles with well developed basal-bulbs and coiled distal 

 ends. Four interradial tentacle-bulbs, and eight sense organs, two in each 

 quadrant. Each sense organ consists of a pocket-like fold of the velum, con- 

 taining 8-13 otoliths and immediately above them a large pigmented eye spot. 

 Four straight, narrow radial canals upon the upper portion of Avhich the 

 gonads are situated. The manubrium is wide and tlask-like, with four 



