^YO A^^cidiae simplicesi ™ 



laeve; color partiuin internarum rubro-aurantiacus: musculorum tlljrae parteni 

 superiorem sinistri lateris amplectentes; orilicium branchiale saepe dextrorsum 

 versum, cloacale dextrorsum positum; tentacula longa, HO, varia lonfritudine; 

 organum vibrans magnum hippocrepicum; saccus branchialis ventriculuni iiun ex- 

 cedens; areolae brancliiales spiraculis 6 — 8-nis; lamina dorsalis alba, denticulata; 

 anus infundibuliformis , margine incrassato. — Alt. 50, long. 30 mm. — (An 

 hujus generis?) 



Distrib.: Litora atlantica Europae. 



Habit. : Adria: Lussin (Grube). 



Ascidia (L.) Ha^x-. {PhaUusia [Sav.] Kupff., Tbaust.). Corpus affixum^ 

 sessilc; orificia (listanda, hranchiale octo-, cloacale sex-lohatum; testa cartilaginca,. 

 mdllis, intcrdmn tenuis, memhranacea, raro arenulis tecta; saccus hranchialis num- 

 quam pliaatus, intcrdmn pticulis mi)iutis: trahrcula hnijitudinatia plcrumque papillata; 

 sti(jmata recta; lamina dorsalis mcmhranam simplicrm aut pJus minusre costatam aut 

 pectinatam referens, pone os ocsophagcmn producta; tcntanda simplicia; intestina in 

 Jatere sinistro sacci hranchialis; genitcdia in laqueo intestindli. 



Subg. Ascidia Roule. Pars posterior sacci branchialis non recurvatus. 

 1. Papillis intermediis. 



1. A. depressa Ald. Corpus oblongo-ovatum, valde depressum, pallide 

 viride, toto Litere expanso aftixum; oriticia distantia, branchiale terminale octo 

 punctis et ocellis rubris intermediis notatum, cloacale duas partes tertias longi- 

 tudinis deorsum positum, segmentis sex et ocellis intermediis; tunica externa pellu- 

 cens, granulata aut tuberculata, interna tertiam partem brevior flavido-viridis, 

 subtus interdum aurantiaca; saccus branchialis subtiliter reticuLatus, longitudina- 

 liter plicatus, papillis in angulis praeditus et minoribus intermediis, stigmata 4 — 5 

 in qnoque interstitio; tentacuLi 15—120 majora et inter quodque par eorum unum 

 aut duo minora; viscera massam compaotam in dimidio posteriore Lateris sinistri 

 sacci branchialis referentia. — Long. 27 mm. — Var. petricola Rkule. Pellu- 

 cida, visceribus flavidulis. 



Distrib.: Mare Britannicum. 



Habit.: Litora Provinciae, „golfe de Fos", in sakt prope a Marseille 

 (Roule); Napoli (Staz.-Zool.). 



m 2. A. elongata Roule. Corpus rotundatum, haud applanatum; tunica. 

 externa corporihus extraneis obtecta; siphones paullum prominentes, rubri, pro- 

 cessus linguiforines parvi obtusi; ramus sinister organi vibrantis intus curvatus, 

 ramus dexter primum intus curvatus, dein extrorsum reflexus. Libium sinistrum 

 laminae dorsalis postoralis Liminam elevatam formans. — Long. 180 — 2i2(), hit. 

 post. 50 — 70 mm. 



Habit.: Marseille, in sab» ante portum in fuudis coralligenis, jirof. 50 m 

 (Roule). 



3. A. producta H.vncoi k. Cori^us vahle chingatum. piriforme, depressum, 

 tota longitudine aflixum, pallide viride; orilicia tubuhisa, branchiaU^ pauUo pro- 

 ductum, ad ventralem partem versnm, anale in tertio quadrante inferiore; ocelli 

 rubri; tunica crassiuscuLa, pellucida, cartihiginea. jiapillis conicis distantibus ob- 

 sita; pallium tenue, viride; tentaeuhi numerosa, gracilia; saccus brancliialis paiiillis 

 mediocribus in an-uhirum angulis munitns ; hunina dorsalis angusta, pectinata, 

 costata, in hitcre sinistro tH.] tuberruUisa. — Long. ad 70 mm. 



Distrib.: Mare Britannicum, -the Minch" (NonMAx). 



Habit.: Marseilh". ]iortus (I^h-le). 



