374 bulletin: museum of comparative zoology. 



it agrees with the descriptions of P. conica by Haeckel, (1879), Mayer 

 (1910), and Hartlaub (1913). But the manubrium, filHng the upper 

 hah' of the bell-cavity, is larger than figured by them for P. conica, 

 or than in two excellent ]VIediterranean specimens of that species 

 with which I have compared it. And there are more tentacles, i. c, 

 34, instead of 24 or less, as seems to be the rule in P. conica from 

 the Mediterranean. The apical gelatinous thickening, so charac- 

 teristic of P. conica, is apparently wanting here; though owing to the 

 condition of the specimen, this apparent difference can not be relied 

 on. And, for the same reason, it is best to place no dependence on the 

 apparent limitation of the nettle-ribs to the lower \ of the exumbrella 

 surface, the latter being much damaged. 



Preserved in formalin, manubrium and tentacular bulbs are pale 

 ochre-yellow, ocelli yellowish brown. 



EuTiARA, gen. nov. 



This genus is proposed for an interesting new pandeid which is 

 allied, in its general structure, to Leuckartiara and Xeoturris, but 

 which has well-developed centripetal canals. It may be defined as 

 Pandeidae with blind centripetal canals alternating with the radial 

 canals; with well-developed mesenteries; complex gonads funda- 

 mentally of the "Xeoturris" type. 



EuTiARA mayeri, sp. nov. 

 Plate 1, fig. 1-5; Plate 3, fig. 6. 



Station 10,161, 100-0 meters, 1 specimen, 18 mm. high by 14 mm. 

 broad. Type. 



Fortunately the single example is in fair condition anatomicall\-, 

 though somewhat crumpled. The bell is dome shaped, thin walled 

 as in Leuckartiara and Neoturris, its cavity deep; and there is no 

 trace of any apical gelatinous thickening, the cavity of the manubrium 

 being domed, corresponding to the outline of the bell, the bell-wall as 

 thin at the apex as elsewhere (Plate 1, fig. 1). In this it resembles 

 adults of Neoturris (Hartlaub, 1913, p. 331). A striking character of 

 this Medusa is the presence of 8 radial exumbral ribs, one opposite 

 each tentacle, extending from the tentacle-base, Avith which it is 

 continuous, up over the exumbrella. At first sight they suggest the 



