belonging to the Family LaodiccidEe. 477 



Melicertissa malayica (Maas), 1905. 



Melicertidiuvi malayicum, Maas, 190o, p. 28, Taf. v. figa. 29-31. 



This species is readily recognized by the large number of 

 tentacles (about one huudred and fifty). There is roughly 

 one cordylus to every two tentacles, but not between every 

 pair of tentacles; the total number of cordyli is about half 

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

 one fourth of the tentacles are provided with ocelli. The 

 gonads are on the proximal half ot the radial canals. 



Uisiribution. East Indian Archipelage (Maas). 



Maas placed this species in the genus Melicertidium as it 

 agreed with Hffickel'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 

 maiginal bulbs of any kind. 



The following genera and species have for tlie present been 

 excluded from the Laodiceid^e : — 



Octonema eucope, Hseckel, 1879, p. 127. 



The genus Octonema was established by IIa;ckel for a 

 single species found at Honolulu, Sandwich Is. Accordin<'- 

 to Hieckel's classification, tlie genus is distinguished from 

 Laodice by the presence of only eight tentacles. Tlie species 

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

 Unfortunately there is no figure of this medusa, so tliat tlie 

 exact meaning of '* Randkolben " remains doubtful. Hieckel 

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

 the basal bulb of the tentacles. The Laodiceidai 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 tlie 

 a{)pearance of a young stage, with only four tentacles and 

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

 according to the description, is situated in the entloderm. 

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



