ACALEEHiE.
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as a Beroe), in the following manner: corpore elliptieo, compla-nato; tentaculis quatuor ciliatis; lobis ad os duobus, corporepaullo brevioribus, reniformibus; verrucis expansilibus seri-atim inter costas et in superficie loborum externa dispositis;colore fusco-rufescente. At the same time, Will mentions, as adifference between Eucharis and Mnemia, that, in the former,the integument is verrucose, and not in the latter; theCiliograda, also, described by Mertens as Botina, wouldappear to belong partly to Eucharis and partly to Mnemia.He describes C-ydippe brevicostata as a new species, with thefollowing diagnosis: corpore oblongo-ovato, posteriore cor-poris parte costis octo brevissimis praedita, anteriore nuda;ciliis longissimis; cirris ramosis albis ; colore griseo-albido.The diagnosis, also, of Beroe rufescens, Forsk., has been thussupplied by him : corpore ovato-oblongo, costis octo, quatuorbrevibus; ore magno nudo ; appendicibus ramosis ad anum;vasibus rubro-maculatis; maculis sub epidermide flavido-fuscis; sanguine rubro. With reference to the luminosityof the Ciliograda, Will remarks, that in a living Beroe ru-fescens the costse are never luminous, and that, in this animal,upon its being touched near the anus, a vivid spark ofyellowish-red light is given out; but, on the other hand,after death the whole substance of the Medusa, includingthe costse, is luminous, but with a bluish-green light, a phe-nomenon which always recurs upon the animal being shaken.In Eucharis, Will noticed that the costse also afforded abluish-green light upon forcible agitation of the water, ortouching; on the first slight contact, a point near the anuswas also always illuminated. A dead Eucharis presentedprecisely the same luminous phenomena as the Beroe.Will, moreover, does not believe that the luminosity of theliving Ciliograda is dependent upon the function of thesexual organs. A new pulmograde Medusa, under the nameCephea Wagneri, has been thus characterized by the samenaturalist: disci glabri centro prominulo, fusco; brachiisbipartitis; cirris inter brachia quatuor; cotyledonibus autlacteis aut cseruleis. Of a new Polyxenia leucostyla he has
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