^ Hydroidea. — Oymnotoka. 



Huc veiit^iiniliter ifferciKlum est : 



m Eudendrium pusillum Sars (nec S. Wru;ht). .Surculis e tubulo repente 

 lilifonni ranioso laevi erectis liumilibus, annulatis, hyalinis; ramis paucis (3 — 4) 

 sparsis. brevibus crassis, flexuosis seu tortis, annulatis, simplicibus aut dichotomis, 

 apice instar tubi aliquantum dilatato et a corpore seu capituh» animalis distante ; 

 capitulo animalium elon^ato, subcylindrico, non retractili, albo, tentaculis circ. "JO 

 universialibus." Parydr. : ignota. 



Habit.: Messina (Sars). 



Perigonimus Sars. Hydr. : HijdroiMHlns pcrmiico nudiifus, ramosns ant 

 indivisKs: h//(lrorhi.ta tHiformis, rcpeus; polfipi fusiformcs, tciifaculis fliformibiis uno 

 verficiUo ad iMisiii hiiposfomii conici ordinatis; gonofhccac a cocncnchijmafc orienfcs. 

 Parydr. : Medttsiformia, liljcra, umhrcUa (floboso-campanulafa; manubritim brevf; 

 canales radiales 4 ; fentacida marginalia U — i (in adtdfis pluria) bidbis non occllatis 

 insidentia. 



1. P. repens All.m. (Atracfylis rcpens T.-S. WRKiHx, Eudendrium pusillum 

 T.-S. Wr. olim). Hydr. : Hydrocaulus erectus. simple.x aut furcatus, supi-a plus 

 minusve dilatatus cyatliiformis, alt. Vs — V4 poll. ; polypi parvi clavati, pro parte 

 retractiles; tentacula 4 — 12; gonothecae pedunculatae, cauli insidentes. Parydr. : 

 Umbrella mitrata, cellulis urticantibus numerosis praedita, liypostomio quadrih\l)iato ; 

 tentacuLa marjiinalia 4 , bulbis flavo-fuscis insidentia, 2 majora . 2 rudimentaria. 



I) i s t r i b. : Maria ^Iaf;nae Britanniae. 



HaV)it.: .Vdria : Pirano, Lesina, Rovijino, Lissa (Pieper). 



2. P. linearis Allm. {Afracfi/Us lincaris Ald.). Hydr. : Hydrocaulus linearis, 

 corneus, simple.x, infra leviter rugulosus ; polypi j^raciles, tentaculis 8 longis alter- 

 natim elevatis et depressis ; j^onotliecae pyriformes aut subjrlobosae, binae aut ter- 

 nae cauli insidentes. Alt. ^4 poll. Parydr. : rmbrelhi globosa. infra truncata; 

 ventricuhis inconspicuus, ramosus ; tentacula 4 clavata. 



Distrib. : Maria i\Iajiiiae Britanniae. 

 Habit. : Napoli (du Plessis). 



3. P. serpens Allm. Hydr. : Caules erecti, breves, simplices, basin, versus 

 ]tauno attenuati, circ. 2'" alti ; liydrotliecae £>raciles pellucidae , ad basin poly- 

 porum haud dihitatae : polypi rubro-aurantiaci, ovati . 12 — 14 tentaculis : gono- 

 tliecae in stolone repente, in pedunculis satis htnfjis. Parydr. : rmbrelhi con- 

 vexa , paullo altior quani hitior ; inanubrium dimidio cavi umbrellae brevius, ore 

 simplici ; tentacula marginalia 2 opposita {Binema sp.). 



Distrib. : Litora .Majinae Britanniae. 



Habit. : ..^Fare delhi Toscana" iKuniAiioi). 



8. Fam. KrDKXDKIDAi^^ All.m. Hydr. : Hydrocauhis peMisarco indutus; 

 hypostoinium al)iupte ditterentiatum ; tentacula tiliformia, uniseriata. Parydr. : 

 Sessilia, sacciformia, sine umbrella. 



Eudendrium (Ennn. p.) Allm. Hydr. : Ih/drocauhis ramosus, hi/dmrhi-a 

 repens, Jilifonnls: poliipi laijcniformcs vel orafi . h/iiiosfoinio crpanso fubiformi; fcii- 

 facula verficillafii suh hi/iiosfomio. Parydr. : Scssilia , in poli/pis aut hi/drocaido, 

 mascula iioli/fhalaniia, fcminca monoflialainia. 



1. Eu. rameum JoH.NST. {TubuJaria rameaVx\.h.). Hydr. : Raniosissinium. 

 .3 — 6-pollicare, cauli fascicuhato ; ramusculi simplices, tubulares ; perisarcum riui- 

 duin, intenhim obsolete annuhitum; polypi tentaculis 20, saepe atropliicis in inas- 

 culis post profUictionem parydrodium. l^arydr. : ^fascnhi ditliahiniia, verticillata 

 in polyjiis sub tentaculis; teminea ovata, sj^arsa in hydrocaulo. Colore roseo ; 

 hydrocauhis rubifrinosus ; parydrodea femiuea aurantiaco-fusca. 



