Videnskabelige meddelelser

booksnow2.scholarsportal.info

Videnskabelige meddelelser

147

that the breeding season of Brissopsis began that year somewhat

later than in 1918 — ). There cannot be the slightest doubt that

we have then here really the larva of Brissopsis lyrifera.

Fig. 2. I,;irva of nrissopxi.'i lyrifera. '»/i.

The larva is easily distinguished already in its quite young

stages from the Echinocardium larva by the postoral, postero-

dorsal and posterior rods being fenestrated only in the outer part,

their basal part remaining unfenestrated ; in this character it agrees

With the larva of Spaldngiis purpiireiis and I cannot say at pre-

sent how to distinguish these two larvæ in the younger stages.

The fully formed larva (Fig. 2) is very distinctly characterized by

having no poster o-Iateral arms, only a pairofsmallear-

More magazines by this user
Similar magazines