;; : 7li I;I:J.I,KTIN oi TUI: r.N'LTKi) STATES KI-II o>\l M I---K.N. 



b f . Marginal tentacles. It; or more. 



i: Proboscis very long, reaehinsjfar below velum ................................................ Tium ji;natam..V 



c'. Proboscis short, 



il. Tentacles with lateral cirri at bases .................................................... llebclla e 



i.l'. Tentacles without lateral olrri. 



c. Bell disk-shaped. Proboscis without limhnated tentacles. 

 /. Otolithxou buses of liMitacles. 



0'. Tentacles 24 nt liberation of medusa ........................................ Ol,,li,i ri 



(Ill' If,, lnil<li**nliil 



Obclia fabcllntnl 

 i/. Tentacles K; at liberation oi medusa .................................... fAiflittnelalmiisn. 



tlbttttt flirfititi,uni. 



nli, I in rnmniixfitnllit. 



i' 1 . Bell deeper, its surface evenly rounded. 

 /. (>t4>litbs between base's of tentacles. 



tj. Otoliths 8 (or more?). Mouth tentacles not thnbriated ...................... Ctytia bictiptwra. , 



if. Otoliths 8. Mouth tentacles limbriatefl ................................. 7YrjMM dindemata. ' 



!l". Otoliths numerous, with sense-bnjbs at their bases ........................ Kftfntheies fulleala. * 



(/".Otoliths numerous. Tentacles with sense-bulbs and thickened '-knee- 



pads " ................................................................. (,'on uatemus rcrtenf.'r 



c". "Bell with a distinct dome-like apical projection .......................................... Onuinn siniitilarit. ' 



a'. Radial canals N. 



b. Bell very deep, shaped like a bishop's miter ................................................ Ti-m-lniiii'inn rfiyihtli*. ^ 



b f . Bell subspherical. somewhat narrowed above. Mouth with fringed tentacles ........... Mfllct i-tuni niiiijHinttla. f^ 



a". Radial canals more than s. 



b. Mannbrium very short, hardly^distinfjuishable .............................................. ]tli<;jmi<l<,(l, * I, 



b'. Mnnubrlnm well develoj>e<l. 



c. Mouth without fimbriiited tentarles. Bell shallow ............................................. Kjnorr albitla. * 



<'. >[outh \vith timbriated tentacles ......................... . ......................... /i/i/<,</m7</Ai ,/i;,, nfnu,l>,;t. 



Ejiphysa virgulata A. Ag. 



1 North American Acalepli^. |i. Is'.i. i 



Bell quadrangular, thick, longer than broad. 1'roboscis short, tubular, without mouth tentacles. 

 Tentacles 4, of which one is much longer than the others, with a triangular base. Radial canals 4. 

 Velum with a sinuous inner edge. 



f'vlrirotion. Tentacles with white liases and a pink stripe or band. Proboscis light yellow. 



I have not seen this species, and the above description is condensed from that of Dr. Agassi*. 



Hybocodon prolifer L. Ag. Fig. 7l>. 

 (Tout. Nat. Hist. T.S.. vol. IV. p.lil:'.. i 



Hell ovate, evenly rounded, nnsyiitmetrical owing to great development of the single tentacle, 

 its surface marked with 5 meridional orange-colored bands, 2 of which start from the sides of the 

 base of the tentacle. Proboscis long, contractile, sometimes reaching nearly to the velum; no mouth 

 tentacles. A single very large marginal tentacle armed with conspicuous nematocyst batteries and' 

 bearing medusa 1 of a second generation at its base. 



t'uliir. Superficial bands and base of tentacle orange red. 



Dtsti-Hintiiiii. Taken in the tow at Woods Hole (Vinal Kdwards. ) The colored bands are not 

 easily seen in these specimens, which were collected in April. 



This species can at once be recognized by its single greatly developed tentacle with secondary 

 medusse at its base. 



Oc?Kyinorplia pendula L. Ag. 



(Cont. Nat. Hist. I". S.. p. '.'TC.. The medusa is dcsrrilicil by A. Agnssiz in North American Acalcphie, p. 192.) 



Bell deep, with the :tpex somewhat pointed, slightly nnsymmetrical owing to the excessive 

 development of one tentacle. Prolxiscis long, often reaching l>elow the velum. Tentacles 4, one being 

 much tM largest, but not bearing secondary medusa> at its base. 



I'vloi: Proboscis light yellow; bases of tentacles light pink. (A. Agassiz.) >.)'.,. 



Dlxti-iliiiHini. I find no record of this medusa having been found in the Woods link .region. 

 although the hydroid form from which il grows has been found 'here. Alexander Agassi/ rcpovtijit 

 from off Cape Cod. 



