42 BRITISH TUNICATA. 



sans Vert. ed. 2, III (1840), p. 528; THOMPSON in Ami. 

 Nat, Hist, (1) XEII (1844), p. 424;] FORBES & HANLEY 

 Brit, Moll. I [1848], p. 35; [CocKs in Rep. R. Cornw. 

 Polyt, Soc, 1849 (1850), p. 73; JOHNSTON Introd. Conch. 

 (1850), p. 177; RUPERT JONES in Cyclop. Anat. IV, pt. 40 

 (1850), pp. 1193, 1201; THOMPSON Nat. Hist. Ireland, 

 IV (1856), p. 359; BRONN Thier-Reichs, III, 1 (1861), 

 p. 109].* 



Body transversely oval, rather compressed, un- 

 attached, completely covered with fragments of shells 

 so as to conceal every part excepting the little-con- 

 spicuous apertures when expanded. Apertures not 

 far apart, slightly tubular, the branchial largest. Test 

 (when freed from its shelly coat) thin, white, trans- 

 parent, and clothed with irregularly-formed fibrils or 

 expansions of the outer layer of the test, which rise 

 from a broad base and generally expand at the top. 

 Mantle white with a bluish tinge. Tentacular filaments 

 very irregular in size, stout, sub-bipinnate. Branchial 

 S'ic with seven folds on each side, the meshes very 

 irregularly convoluted. Oral lamina smooth. 



Largest diameter about an inch and a quarter. 



Hab.? 



ENGLAND. Coast of Northumberland (Alder fy Han- 

 cock}. Polperro [/ Lou</Jtrin], and Falmouth, Cornwall 

 (Codes). 



SCOTLAND. [Leith shore (Jameson). ~\ Frith of Clyde 

 (Groodsir). 



IRELAND. Coasts of Antrim and Down (Thompson) 

 [1844]. Comiemara, Galway [7 More']. 



First record. [Jameson, 1811.] 



The description of this species is taken from speci- 

 mens kindly presented to us by the late Professor 

 Good sir, which we have little hesitation in referring to 



* It will be seen that only fcrar of these references are given by the 

 authors, namely M tiller (2), Bruguiere, and Forbes & Hanley. " Pandocia 

 conchilega, Flem. Brit. Anim. 468," also appears in the transcript of their 

 MS., but as an addition, in a dillVrent handwriting from the rest. Fleming's 

 Pandocia conchilega appears to be Savigny's Cynthia mytiligera.and if so, as 

 this belongs to his tribe Cijnthix Pandocix, it is not a Molgula. This 

 synonym, with other references dependent xipon it, is therefore omitted. 



