166 THE MEDUSAE. 



It would be of much interest to know the true relationship of this form to 

 the three species from the Ceylon-Maldive region, E. Z«c;!ea Bigelow (: 04), E. 

 curva Browne (: OS**), and Octorchis orientalis Browne (: OS*"). All of these are 

 undoubtedly closely allied to one another as well as to E. levuJca, but they ap- 

 pear to be separated from the latter by the condition of the marginal organs, 

 E. lactea having cirri flanking the tentacles, but not the marginal bulbs, while 

 in E. ciirva and Octorchis orientalis there are cirri flanking the papillae, but 

 none at the bases of the tentacles. 0. orientalis, and E. curva (known from 

 only one specimen) seem to be separable chiefly by the position of the 

 gonads ; but since Maas (: 05) has found that in E. levuka gonads are some- 

 times developed on the peduncle in addition to those on the subumbrella, it 

 is questionable whether the difference in this respect is really of specific sig- 

 nificance rather than an indication of local, individual, or perhaps seasonal 

 variation. Unfortunately all of these species except E. levuka are known 

 from only a few specimens each. No final disposition of them is possible 

 until something is known of their life histories. 



Eutimalphes Haeckel, 1879. 



Eucopidae with gelatinous peduncle ; with eight otocysts and numerous 

 tentacles. 



Up to the present time, so far as I can learn, only three species have 

 been referred to this genus, viz., E. pretiosa Haeckel ('79), Tiaropsis indicans 

 Romanes ('76), and Elrene coenilea L. Agassiz ('62). The first of these, however, 

 seems to be closely related to Tima, for it has the extensive development of 

 lips characteristic of that genus, while Haeckel's statement that it has only 

 eight otocysts is at least open to question, inasmuch as he himself says that 

 part of the margin of the single specimen was destroyed. Unfortunately 

 Romanes ('76, '77) in the description of T. indicans gives no details as to the 

 tentacles or whether or not the margin bears either knobs or cirri ; but 

 he explicitly states that there are only eight large otocysts, and his figure 

 ('77, pi. 15, fig. 1) shows the long peduncle. The gonads also are repre- 

 sented as situated on the subumbrella and extending from the bell margin 

 to the base of the peduncle. E. coerulca L. Agassiz is the best-known mem- 

 ber of the genus. In this species the gonads extend over both subumbrella 

 surface and peduncle, the thirty-two tentacles are flanked by lateral cirri, 

 and there are a large number of rudimentary tentacular knobs in addition 

 to the developed tentacles. 



