Ascidiidae. 475 



Ciona Say. Corpm dcxtrorsum onVinahmi; musculi in utroque corporis laicre, 

 /ormam fasciarum paucarum Jongitndinalium rcfercntes; plica pallii operculiformis 

 nulla; sti(jmaia rccia axi corporis longiiudincdi paraUeia ; lamina dorsalis in seriem 

 piroccssuum fahatorum soluta: inicstinum si)iistrum, saccum Ijranchialcm posticc ex- 

 cedens; organa generaiionis gJandulam haud lohatam lateris sinisiri in laqueo intestini 

 iwsiiam formantia. 



Siibg. Ciona s. str. Roule. Corpus parte mininia aftixa. 



1. C. intestinalis Kipff. (Ascidia intesiinalis L., A. canina 0. F. MCll., 

 A. rorrugata 0. F. jMill. , Phallusia iniesiinalis et canina Sav. , C. fascicularis- 

 Hanc, C. canina Kpff., Tbaust.). Corpus altissimum, cylindratum, parte intima 

 lateris sinistri aut basi aftixuni: pallium crassuni, introrsum gelatinosum; oriticia 

 appropinqiiata, siplionibus insidentia; tentacula :")() — 66, magnitudine varia: organum 

 vibrans iiippocrepicum; pallium hj^alinuin, viridi fusco tinctum. — Alt. ad 170, 

 lat. 50 mm. 



Distrib.: Atlanticum septemtrionale, balticum; Pontus; Australia. 



Habit.: Banyuls (Lahille), litora Provinciae, in aquis portuum (Roule), 

 Marseille, Canal de la Tourette, Bassin du Lazaret (Marioxi; Nizza (Risso); 

 Spezia (Taegioni-Tozzetti) ; Napoli (Delle Chiaje, Traustedt ) ; Taranto (0. G. 

 Costa); Messina (Takgioni-Tozzetti); Adria: Trieste (Heller), Portore, Crivizza, 

 Lussin (Grube). 



C. intestinalis var. canina. Siphones breves, fere aequales, longit. siphonis 

 branchialis ' ,. cnrporis niinur. 



C. intest. var. macrosiphonica. Siphones perlonjii, fere aequi, sipho bran- 

 chialis diniidio corpore kmgior. 



C. intest. var. fascicularis. Siphones breves. inaequales. corpus villis cylin- 

 dricis affixum (Roule). 



2. C. Savignyi Herdm. Corpus oblong-um, fere cj^lindricum , post rotun- 

 datuni, latum, sinistra aftixum; oriticia approximata, tenninalia : superticies, parte 

 sinistra postica excepta, glabra; testa pellucida; pallium tenue; saccus branchialis 

 non plicatus; papillae in decussatione trabecularum longitudinaliuni et trans- 

 versaruni, intermediae nnllae, areolae latiores quam longiores, quinis stigmatibus; 

 lamina dorsalis seriem processuum linguiformium referens. — Long'. 18, statu 

 expanso 20 — 25 mm (40 — 70 nim Roule). 



Distrib.: Mare Japonicum (.,Challenger"). 



Habit. : Litora Provinciae, SO — 150 m prof. (Roule). 



Subg. Pleurociona Roule. Corpus toto latere uno aftixum. 



m 3. C. Edwardsi Roule. Corpus semicylindricum, latere sinistro plano 

 affixum, cute clare flava (viridi-flava), maculis fulvis; siphones antici, approximati; 

 oriticium branchiale 8-, cloacale 6-lobatum; lamina peritonealis inter cavum peri- 

 branchiale et cavitatem corporis valde obliqua, haud perpendicularis; branchiae 

 sinubus tertii ordinis perpaucis. — Long. 80 — 90, lat. 80 — 40 inm. 



Habit. : Marseille, in salo ante portum, inter Cap Janet, St. Henry et 

 rEstaque, et ins. chateau dTf et Ratonneau, 30 — 40 m prof. (Roule). 



Species n(m descripta: 



C. Roulei Lah., Banyuls (L.^hillk). 



Rhodosoma Ehb. (Sc/»<>flfsc2/s Stimps., Pera, Peroides "MiAcDoy., Chevreulius 

 Lac.-Dith.). Corpus sinisirorsum ordinatum ; plica jXtUH ad instar opcrculi orijicia 

 tegens, pallium operculumquc durum , cartUagincum ; stigmaia magna, ohlonga, axi 

 longitudinali corporis parallcla; lamina dorsalis in sericm processuum falcatorum 

 soluta; organa gcncraiionis rctiformia rirca mcdiam iidcsiini partem. 



