ASCIDIA VKNOSA. 105 



(PL IX, fig. 3) ; it is composed of a vast multitude of 

 minute, obtuse, ramified caeca, crowded and packed 

 together in much confusion. 



12. Ascidia producta Hancock. 

 (PI. XVII, fig. 9 ; PI. XIX, fig. 7 ; and fig. 21 in text.) 



[Ascidia producta HANCOCK in Ann. Nat. Hist. (4) VI 

 (1870), p. 360.] 



Body much elongated, pyriform, depressed, attached 

 by its entire length, of a pale green colour. Apertures 

 tubular, the branchial a little produced and turned 

 towards the ventral margin, the anal three-fourths 

 down near the ventral margin : ocelli red. Test rather 

 thick, pellucid, cartilaginous, covered with minute, 

 distant, conical papillae. M<nttl<>- of a full dark green 

 colour, delicate, with the branchial tube considerably 

 produced and terminal ; the anal short and turned 

 backwards. Tentacular filaments numerous, slender. 

 Branchial xa<- minutely plicated, with moderate-sized 

 papillae at the intersections of the meshes ; secondary 

 papilla? altogether wanting or rarely developed here 

 and there. Oral lamina narrow, pectinated, ribbed, 

 and tuber ciliated on the left side. 



Lt a (~/flt two inches and a half. 



Hal. At extreme low water and below tide-marks. 



SCOTLAND. Hebrides [, dredged in the Minch] 

 (Norman). 



IKELAND. [Strangford Lough (Norman, 1869).] 

 First record. Hancock, 1870 ; coll. Norman [186(5]. 



The body of this species is wide behind, much elon- 

 gated, and curved towards the ventral margin, narrow, 

 tapering in front. It is attached throughout its entire 

 length, and there is a thin, interrupted, marginal 

 expansion, widening the area of attachment. The 

 branchial tube is terminal, and unites imperceptibly 

 with the tapering extremity of the body ; it is turned 



