lelonging to the Family Laodiceidte. 477 



JlJelicertissa malayica (Maas), 1905. 

 Melicertidium malayicwn, Maas, 1905, p. 28, Taf. v. figs. 29-31. 



This species is readily recognized by the large number of 

 tentacles (about one hundred and fifty). There is rouo-Iily 

 one coidylus to every two tentacles, but not between every 

 ]jair of tentacles; the total number of cordyli is about halt' 

 that of the tentacles. The cirri are rather scarce. About 

 one fourth of the tentacles are provided with ocelli. The 

 gonads are on the proximal half of the radial canals. 



Distribution. East Indian Archipelage (Maas). 



Maas placed this species in the genus Melicertidium as it 

 agreed with Hseckel's definition of the genus, which happened 

 to be an erroneous one. 1 have recently emended the genus 

 Melicertidium. The species belonging to it have eight radial 

 canals and numerous tentacles, but they are without cirri or 

 marginal bulbs of any kind. 



The following genera and species have for the present beeti 

 excluded from the Laodiceidae : — 



Octonema eucope, Hisckel, 1879, p. 127. 



The genus Octonema was established by Ha^ckel for a 

 single species found at Honolulu, Sandwich Is. According 

 to Hseckel's classitication, the genus is distinguished from 

 Laodice by the presence of only eight tentacles. The species 

 has a large number of marginal bulbs, knobs, and cirri. 

 Unfortunately there is no tigure of this medusa, so that the 

 exact meaning of " llandkolben " remains doubtful. Ha^ckel 

 also states tliat a black ocellus is situated on the outer side of 

 the basal bulb of the tentacles. The Laodiceidaj usually 

 have the ocelli on the inner side of the basal bulbs, and there 

 is no trustworthy evidence to show that any species of the 

 family has ocelli on the outer side. It is quite probable that 

 Octonema eucope belongs to another family. 



Octonema gelatinosa, Mayer, 1900, p. 8, pi, vi. figs. 20-21. 



The description of this species is based upon a single 

 specimen taken in Charleston Harbour, U.S.A. It has tiie 

 appearance of a young stage, with only four tentacles and 

 twenty marginal bulbs. Each bulb has an ocellus, whicii, 

 according to the description, is situated in the endoderm. 

 There are eight marginal clubs, and a figure shows that their 



