Rev. A. M. Norman on a neiv Genus of British Hijdrozoa, 261 



Aristotle, partly because to have done so would have been to 

 anticipate the results of a wider inquiry. Probably many other 

 members of this class were known to Aristotle than those he has 

 named ; probabl)^, also, these unknown animals have, by taking 

 a share (whose limits it is useless to attempt to define) in the 

 descriptions we have been studying, helped to increase the con- 

 fusion and uncertainty. 



The following table contains the systematic classification of 

 the Malacostraca mentioned by Aristotle, and their probable 

 equivalents. The classification is that of Heller, op. cit. 



Crustacea Podophthalmia. 



Brachyura Portunus dqmraior, 



Linn. 

 1 Cancer pagurus, Lmn. 

 Thelphusa Jiuviatilis, 



Latr. 

 Pinnotheres veterum. 

 IMaia Squinado. 

 ? 



Ocypoda cursor. 

 Eupagurus Bernhardus, 



Brandt. 

 Diogenes varians,Costa. 

 IScyllarus. 

 Palinurus vulgaris. 



Anonmra. 



Macriira. 



Fam. Pterygura. 



Fara. Loricata. 



?Fam. Thalassinidse. 

 Fam. Astacidse. Homarus vulgaris. 



= 0L KapKlVOl 01 fXlKpOL 



(De Part. iv. 8). 

 = IIdyovpoL. 



=:0l KapKlUOL 01 TTOTO.- 



pioi. 

 = ni.vvo(pvKa^. 

 =/u.ata. 



= 'HpaK\€COTlKoi. 



='lnn€vs. 



= t6 KapKlVlOV TO TWV 



orrpofjL^Qiv. 

 =r6 Tti>v vqpLTojv. 



= Kdpa^os. 



]- 



aaraKos. 



INephrops norvegicus. 



Astacus, flu viatile form, —oi do-raKol oi irord- 



Fara. Caridae. 



Crangon vulgaris. 

 IPalcBmon squilla 

 "^PencBus caramote 

 IStenopus spinosus 

 ? 



An omobrancliiata. Fam. Squillidaj Squilla mantis. 



}'■ 



pLlOl. 



■ T] Kap\s rj KViprj. 



r) KapXs rj KV(f)T}. 



■■TO Kapidiov. 

 :rj Kpdyycav, 



Incertae sedis 



{■ 



= 0L apKTOl. 

 = 6 KvXKapos» 



XXVIII. — On Merona, an undescribed Genus of British Hydrozoa. 

 By the Rev. Alfred Merle Norman, M.A. 



Class HYDROZOA. 



Fam. Clavidse (Allman). 



Genus Merona*, nov. gen. 



Trophosome. — Coenosarc consisting of erect or semierect simple 

 tubes, which arise at intervals from a creeping, filiform 

 * Nomen arbitrarium proprie assignatum. 



