76 r.KITISH TUNK'ATA. 



Ascidia monarclius CUVIEK Mem. Ascidies in Mem clu Mus. 



II (1815), p. 32. 

 PhaUitsin monarchus SAYIGNY Mem. Anim. sans. Yert. pt. '2 



[1816], p. 167, pi. x, f. 2, 



[Pluillnxift inriitnla FLEMING Brit, Anim. I (1828), p. 468. 

 Ascidia mentula et commnui* (Forbes MS.) THOMPSON in 



Ann. Nat. Hist. (1) XIII (1844), p. 434. 

 Ascidia cum munis FORBES (MS.) in Rep. Brit. Assoc. 1850 



(1851), p. 242.] 

 AveifUnm incniareltu* WOODWARD Man. Moll. [1856], p. 337, 



f. 224. 

 'Ascidium mmtula ADAMS Gen. Rec, Moll. (1858), pi. cxxxni, 



f. 1.] 



FIG. 1-i. ^scich'if utentnla. One-half natural size. 



Boilij oblong or irregularly ovate, and much pro- 

 duced 'towards the upper end; coarse, horn-coloured, 

 but varying from greenish white to very dark brown, 

 usually adhering more or less by one side. Apertures 

 distant, sessile, the branchial one terminal, the anal 011 

 a bulging of the side, about two-thirds down ; ocelli 

 yellow with a central red spot. Text thick, tough, and 

 cartilaginous, semitransparent ; occasionally roughly 

 furrowed, but not tuberculated ; often with irregular 

 swellings produced by imbedded mussels. Mantle red, 

 especially towards the apertures ; greenish, or inclined 

 to brown. Tentacular filainrnts rather numerous, of 

 equal length; mostly stout, Branchial sac with 

 moderate- sized papillae at the intersections of the 

 meshes, and intermediate smaller ones on the longi- 

 tudinal bands or bars. Oral lamina transversely 

 ribbed and strongly pectinated. 



