ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 307 



On a shell dredged in 40-50 fathoms off Unst. A very remarkable 

 form. 



Lepralia ciliata (Linn.). Tide-marks to 90 fathoms. 



Hyndmanni, Johnst. 80-110 fathoms. 



Woodiana, Busk, Crag Polyzoa, p. 42, pi. vii. figs. 1 & 3 ; Hincks, Cat. 



Zoophytes Devon and Cornwall, p. 42. Very abundant in deep water, 

 80-170 fathoms. 



discoidea, Busk, Quart. Journ. Mic. Sci. N. S. vol. vii. (1859) p. 66, 



pi. xxii. figs. 7, 8 ; id. ibid. vol. viii. (1860) p. 144, pi. xxvii. figs. 4, 5 ; 

 Hincks, ibid. vol. viii. p. 276, pi. xxx. fig. 4. " Shetland, Barlee " 

 (Busk). 



nitida (Eabr.). Tide-marks and shallow water. 



annulata (Eabr.). Hoots of Laminarise and stones, shallow water. 



Peachii, Johnst. To 170 fathoms. 



ventricosa, Hassall. 15-170 fathoms. 



laqueata, Norman, Ann. Nat. Hist. 3rd ser. vol. xiii. (1864) p. 85, pi. x. 



fig. 5. 80-170 fathoms, frequent. 



abyssicola, n. sp. Polyzoary irregular, in patches of considerable size. 



Cells irregularly arranged, pointing this way and that, not in quincunx, 

 widest in the middle, tapering thence above and below, moderately con- 

 vex ; surface dull, minutely granular, no raised lines or rows of perfora- 

 tions separating the cells : mouth small, terminal ; lower lip advanced, 

 encroaching on the mouth, convex, pouting, a denticle within the mouth, 

 wide, little raised, and so deeply seated that it cannot be seen unless 

 carefully looked for ; upper lip free, bearing two spines (which, however, 

 are very rarely present). Ovicell globose, tumid, wider in the centre 

 than the top of the cell, with a little transverse rib (caused by the upper 

 lip) just over the mouth ; surface minutely granular as the cells ; these 

 minute granulations appear to be centrally punctate. The form of the 

 ovicells and mouth in the fertile cells remind one forcibly of a helmet 

 with the vizor raised. An inhabitant of the deepest water, having been 

 only found in 140-170 fathoms to the N.N.W. of Unst. 



This species comes very near to L. microstoma, but is, I think distinct. 

 The cells are very much larger, the mouth less tubular and raised, the 

 ovicells less thrown back off the mouth ; and there is a deeply seated 

 denticle in the mouth, which does not seem to be the case in L. micro- 

 stoma. 



polita, Norman, Ann. Nat. Hist. 3rd ser. vol. xiii. (1864) p. 87, pi. xi. 



fig. 1. 70-170 fathoms. 



microstoma, Norman, Ann. Nat. Hist. 3rd ser. vol. xiii. (1864) p. 87, 

 pi. xi. fig. 2. 20-25 miles N. and N. by W. of Unst. 80-140 fathoms. 



innominata, Couch. Scarce, down to 170 fathoms. . 



puncta ta, Hassall. Tide-marks, common. 



rinr/ens, Busk, Quart. Journ. Mic. Sci. N. S. vol. iv. (1856) p. 308, pi. ix. 



figs. 3-5. 80-170 fathoms. 



bispinosa, Johnst. On stones and shells, 50-170 fathoms-. Differing 



from Guernsey specimens in the much larger size of the cells. 



umbonata, Busk, Quart. Journ. Mic. Sc. N. S. vol. viii. (1860) p. 143, 



pi. xxvii. fig. 1. " On stone, Shetland, Barlee " (Busk). 



cottaris, Norman, Eeport Brit. Assoc. 1866 (1867), p. 204. Scarce, 



80-100 fathoms. 



Pallasiana . (M6ll.)=.Z/. canthariform is, Busk, Quart. Journ. Mic. Sci. 



N. S. vol. viii. (1860) p. 143, pi. xxvi. figs. 3, 4. Common between tide- 



