ASCIDIA MEXTVLA. 77 



usually from four to six inches (occasionally 

 much longer). 



Hal). From within tide-marks to cleepish water 

 (adhering to rocks, &c.). 



ENGLAND. [Brighton, Sussex (MerrijieLJ, 1800).] 

 Lulworth Cove, Dorset (Jeffreys). [Torcross, Devon, 

 dredged, with ftulirlla pnnciUitx adhering to it (Mon- 

 tagu, 1803). Falmouth, Cornwall (Cocks, 1849). 

 Scilly Isles (Cams, 1850).] Isle of Man (Furl**). 



WALES. [Tenby (Woocliranl, 1856).] 



SCOTLAND. [Clyde (Forbes, 1S50). Corrigils, Arran 

 (Lands oo rough, 1852). Lamlash, Arran; and ('umbrae 

 (Norman, 1857). Hebrides (Forles, 1850). North 

 Uist (Melntosh, 1865).] Not uncommon on the North- 

 west coast (Forbes). Orkney Isles (Allman and Forbes). 

 Shetland Isles (Forbes and ./<//>///*). [Middle Haaf, 

 Shetland (Norman, 1868).] 



LRKLANK North-west coast (Thompson). [Belfast 

 Bay, Antrim ; Clew Bay, Mayo ; and Roundstone 

 Bay, G-alway (Thompson, 1844). Bantry Bay, Cork 

 (Wright).] 



First record.- {Montagu, 1803.] 



Ascidia mentida (fig. 14) is attached by a small 

 portion of the side of the body towards the posterior 

 extremity, or diagonally by the base; never, or rarely, 

 by the whole side, as is the case with some of the allied 

 species. The test, which is rather opaque and fre- 

 quently thick, rough, and coarse, is well supplied with 

 vascular channels, which in specimens preserved in 

 spirits, being yellowish and somewhat opaque, can 

 usually be well observed ramifviner in the semitrans- 



i/ *j <> 



parent substance of the test. They are much sub- 

 divided, and the twigs which approach the inner sur- 

 face are usually simple, or only occasionally a little 

 enlarged at the extremities ; those which are seen at 

 the external surface terminate in irregularly-rounded 

 enlargements. 



The mantle is well supplied with interwoven mus- 

 cular bands, longitudinal, transverse, and diagonal ; 



