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REPORT ON ZOOLOGY , MDCCCXLIV.

declares this animal to be a Polype as yet immature, which,when full grown, might probably find its position among theTubularise, since it is a fact that even young Polypes mayproduce ova and possess eyes; Yan Beneden even does notconsider it impossible that Eleutheria may be the youngeranimal of Synhydra, in which conclusion, however, Quatrefagesrefrains from joining him. Yan Beneden, moreover, recog-nises in the Dysmorphosa conchicola, Philip., and Cordylo-phora lacustris, Alim., his Hydractinia described in the year1841, and proposes the following classification of theTubularise:

A. Polypes a polypier.

1. Pennaria, Goldf., tentacules de deux sortes, dont lessuperieurs epars et a plusieurs rangees. P. Cavolinii.

2. Tubularia, Pall., tentacules de deux sortes, en deuxrangees.

T. calamaris, Pall., T. coronata, Abildg., T. Dumortieri,

V. B.

3. Syncoryna, Ehrb., tentacules tous semblables, plusieursrangees.

S. pusilla, Ehrb., S. Listerii , V. B., S. ramosa, Sars,S. Sarsii, Loven, S. Chamissonis, Ehrb.

4. Corydendrium, V. B., tentacules tous semblables, epars.C. parasiticum (Sertularia parasitica, Cuv.)

5. Eudendrium , Ehrb., tentacules en une rangee.

E. ramosum, Ehrb., E. brioides, Ehrb., E. splendidum,Ehrb., E. racemosum, Ehrb.

B. Polypes sans polypier.

6. Coryna, tentacules tous semblables, epars.

C. squamata, Miill., C. aculeata, Wagn.

7. Hydractinia, V. B., tentacules a une rangee.

H. lactea, V. B. ( Synhydra parasita, Quatr.), H. rosea,V. B.

Two interesting memoirs, on the Campanularise andTubularise, have also been published by Yan Beneden. Inthe former of which (Memoires sur les Campanulaires de laCote d’Ostende, in the Memoires de l’Academie Royale de