ASCIDIANS COLLECTED BY THE YACHT ' GLIMPSE,' 1881. 533 



horns turned inwards. The genital glands are very numerous 

 and are scattered over the inner surface of the mantle, projecting 

 into the peribranchial space. 



The whole peribranchial cavity and the spaces behind the folds 

 of the branchial sac in the specimen from Portland were packed 

 full of tailed larvae. The specimen was taken in August. 



PoLTCAEPA COMATA, Alder. (Plate X. fig. 6.) 

 This species was found at several places, more especially at 

 Southampton in May, at a depth of 3 fathoms, and at Pin Mill, 

 on the Orwell, in September. Most of the specimens are about 

 |- inch in their greatest length. 



Kupfter * described this species fully in 1874. 



Fam. 4. Molgulid^. 



MoLQFLA OCCULTA, Kupffer. 



This species was found at Torbay in two different conditions. 

 Most of the specimens had a uniform coating of fine sand ; but 

 some from 4 fathoms, ofi" Daddy's Hole Plain, were covered with 

 small stones and fragments of shell. 



The characters agree fairly well with Kupffer's description of 

 this species in the ' Jahresberichte,' p. 224, and with Heller's 

 figures of specimens from the Adriatic f- 



There are seven folds on each side of the branchial sac, with 

 three or four internal longitudinal bars on each fold, and one in 

 the interspace. The tentacles are moderately branched ; there 

 are six large ones, and three or four series of smaller ones placed 

 alternately. 



The dorsal tubercle is large, cordate, with both horns turned 

 inwards, and is reversed, the aperture being directed posteriorly, 

 towards the angle of the peritubercular area. 



MoLGTJLA c^PiFOEMis, u. sp. (Plate XI. figs. 1-8.) 



This species appears to be undescribed. It was only met with 

 in Hooles Bay, which may be called a shallow muddy salt-water 

 lake 1^ mile long, 1\ mile wide, with deeper channels, and a 

 narrow opening at Poole into the main harbour. Two specimens 

 were dredged at the end of May at a depth of 1 fathom ; and 

 their resemblance, when living, to small onions was so great as to 

 make the name ccepiformis, which we liave given it, very appro- 



# ' Jahresberichte der Kommissiou zur Uatersuchung der deutschen Meere 

 in Kiel.' Berlin, 1874. VII. Timicata. 



t " Untersuchungen ii. d. Tunicaten d. Adriat. u. Mittelm. iii. Abth.," 

 Denksch. k. Akad. Wissen. Wien, Bd. xxxrii. p. 267, Taf. vi. figs. 14-15 (1877). 



