308 BEPORT 1868. 



marks. L. canthariformis 9 Busk, seems to be nothing else than this 

 species with the cells a little more erect than usual. 



Lepralia pertusa (Esper). On ahells, especially Ditrupse, and stones,, 40-100 

 fathoms. 



labrosa, Busk. Scarce, 40 fathoms. 



simplex, Johnst. " 45 fathoms, Haddock-ground, Unst, Peach, 18G4 " 



(fide Alder in litt.). 



Malusii (Audouin). Tide-marks to 50 fathoms. 



minuta, n. sp. Cells minute, arranged in remarkably regular lines, 



diverging from a centre ; the parts about the mouth raised in a pustular 

 manner ; mouth horseshoe-shaped, the central portion of the lower lip 

 encroaching on the aperture, sometimes in a rounded, at others in a 

 more denticulate and bifid form ; surface granulated, margins between 

 cells areolated ; ovicells subimmersed, granular, imperforate. In very 

 small roundish patches on stone. Shetland, very rare, and Guernsey 

 (A. M. N.) ; Wick (Mr. Peach). 



tubulosa, n. sp. Cells shortly ovate, hyaline, smooth, glistening, punc- 

 tate ; mouth produced into a very long tube, which stands upright from 

 the polyzoary, aperture round, peristome thin and simple ; on the cell 

 just below the origin of the tube a conspicuous pore. A remarkable 

 form, wholly unlike any other species ; found on a stone dredged in a 

 few fathoms water at Hillswick. 



monodon, Busk, Quart. Jouru. Mic. Sci. 1ST. S. vol. viii. (1860) p. 213, 



pi. xxix. figs. 3, 4. Common, in 80-170 fathoms. 



granifera, Johnst. Underside of stones, tide-marks. 



hyalina (Linn.), Gray, List of British Radiated Animals in Brit. 



Mus. pp. 128 & 149. On rocks and weeds. 



lepralioides, Norman, Quart. Journ. Mic. Sci. vol. viii. (1868) p. 222, 



pi. vii. figs. 4, 5. On stones, 80-140 fathoms. 



pygmcea, n. sp. Cells cylindrical, semierect, immersed through a con- 

 siderable part of their height ; peristome raised, simple, unattached all 

 round, more elevated at the sides of the cylindrical aperture; surface 

 nearly smooth and imperforate. Ovicells galeate, depressed in front, 

 imperforate. No avicularia. A minute species, presenting very little 

 character, but manifestly distinct from its allies. Occurs in little round 

 patches, which are seldom more than a tenth of an inch in diameter ; 

 the largest patch seen not a fifth of an inch ; on stones from very deep 

 water, in 80-170 fathoms, where it is not uncommon. 



Cellepora pumicosa, Linn. 



avicularia, Hincks, Cat. Zooph. Devon and Cornwall, p. 48, pi. xii. fig. 6. 



In " nodulous rolls " on Tubularia, Sertularia3, &c. 



Hassallii (Johnst.). Rocks, and roots of Laminarise. 



ramulosa, Linn. 40-170 fathoms. 



dwhotoma, Hincks, Cat. Zooph. Devon and Cornwall, p. 49, pi. xii. 



figs. 7, 8 ; Alder, Quart. Journ. Mic. Sci. vol. iv. (1864) p. 96, pi. ii. 

 figs. 2-4. Living attached to Sertularian Hydrozoa, in 40-70 fathoms. 



attenuata, Alder, Quart. Journ. Mic. Sci. vol. iv. p. 97 (1864), pi. ii. 



figs. 5-8. Local, 80-110 fathoms, 20-25 miles N.N.E. of Unst. 



cervicornis (Ellis and Sol.). 40-170 fathoms. The Shetland forms are 



much less massive than that of the Devon and Cornish coast. Some- 

 times they are a great deal branched, the branches interlacing and 

 crossing each other iri all directions, and more or less flattened. A rarer 

 form has but few branches, and those very long, simple (i. e. not dicho- 



