48 BRITISH TUNICATA. 



M. complanata is readily distinguished from its con- 

 geners. The depressed form and large surface of 

 attachment are characters very unusual in this o^enus. 



*j 



Another peculiarity is the reversed position of the 

 oviducts. 



3. Molgula oculata Forbes. 

 (Plate XXIV, figs. 7-10.) 



Molgula oculata FOEBES in Brit, Moll. I [1848], p. 36, pi. D, 

 f. 6; [CocKS in Kep. R. Cornw. Folyt. Soc. 1849 (1850), 

 p. 73; RUPERT JONES in Cyclop, Aiiat, IV, pt, 40 (1850), 

 p. 1193; FOEBES in Rep. Brit, Assoc. for 1850 (1851), p. 

 243; WOODWARD Man. Moll. (1856), p. 337; BEOKN Thier- 

 Reiclis, III, 1 (1861), p. 109; AXSTED & LATHAM Channel 

 Isl. (1861), p. 219]. ' 



[Molgula ocelata (male pro ocnlatn) COCKS in Rep. R. 

 Cornw. Polyt, Soc. 1851 (1852), p. 17.] 



li/ globose, adhering slightly at the base, or some- 

 times free, closely encrusted with fragments of shells 

 and pebbles, excepting a smooth, depressed, sharply- 

 defined, reniform space above, which is soft, trans- 

 lucent, and blotched concentrically with bluish green 

 and orange or yellow. A^i'iiit r<'* short and wide, 

 situated within the smooth space. Test (when stripped 

 of its coat of extraneous matter) thin, soft, transparent, 

 and colourless ; set with irregular, longish, glandular 

 (hair-like) fibres, to which the shells and pebbles 

 adhere. Mantle very thin and transparent, with diffi- 

 culty separated from the test. Tentacular jilaiHcn/* 

 branched, bipinnate. Branchial sac with seven rather 

 narrow folds on each side, the meshes (secondary 

 vessels) irregularly convoluted. 



Diameter two to two and a half inches. 



Hab. [Laminarian zone, adhering to shells.] 



ENGLAND.- Torbay, Devon (Alder). Plymouth, 

 Cornwall, adhering to a scallop in 25 fathoms; dredged 

 (Forbes $* Me Andrew). [Helford River, Falmouth, 

 Cornwall; in trawl refuse (Gocks.}~\ 



