ON THE .SHETLAND CRUSTACEA, TUNICATA, ETC. 3809 
tomously dividing),.and round. Placed side by side with Cornish spe- 
cimens this looks very different, but the micrescopic characters appear 
to be identical. 
Palmieellaria elegans, Alder, Quart. Journ. Mic. Sci. vol. iv. (1864) p. 100, 
pl. ii. figs. 1-4. A beautiful little species, 80-110 fathoms, eighteen to 
twenty-five miles N. and N.N.W. of Burrafirth Lighthouse. 
Tessaradoma gracile (Sars)= Pustulipora gracilis, Sars, Reise Lof. Finm. 1850, 
p. 26, = Quadricellaria gracilis, Sars, Beskr. Norske Polyz. p. 15; Alder, 
Quart. Journ. Mie. Sci. vol. iv. (1864) p. 101, pl. ii. figs. 9-12, = Oncho- 
pora borealis, Busk, Quart. Journ. Mic, Sci. N.8. vol. viii. (1860) p. 213, 
pl. xxviii. figs. 6, 7, = Anarthropora borealis, Smitt, Ofvers. af K. Vet.- 
Akad. Forh. 1867, Bihang, p. 8, pl. xxiv. figs. 25-29. Rather local, but 
not rare on the Outer Haaf. It is necessary that the generic name Qua- 
dricellaria, which is preoccupied, should be changed. Smitt has insti- 
tuted a genus Anarthropora to receive Lepralia monodon and the present 
species! Such a union, in my opinion, cannot stand. Leaving, there- 
fore, Z. monodon as the type of Smitt’s genus, I propose the name 
Tessaradoma, the characters of which will be those given by Alder, J. ¢. 
I have not adopted the genus Anarthropora for L. monodon in this 
Report, because an entire rearrangement of the Membraniporide is re- 
quired, and until that entire rearrangement is carried out (and this I 
hope shortly to do), I have thought it better not to partially dismember 
the genus Lepralia. 
Hemeschara struma, Norman, Quart. Journ. Mic. Sci. vol. viii. (1868) p. 221, 
pl. vii. figs. 6-8. In 100 fathoms, about twenty-five miles north of Unst, 
attaching itself to stones and the branches of C. cervicornis, and running 
out into free expansions. 
Eschara Landsborovii (Johnst.), Alder, Quart. Journ. Mie. Sci. vol. iv. (1864) 
p. 105, pl. iv. figs. 1-3. Very rare; the Lepralian state on a stone from 
170 fathoms. 
levis (Fleming), Alder, Quart. Journ. Mic. Sci. vol. iv. (1864) p. 102, 
pl. iil. figs. 8-11. Scarce, in about 100-170 fathoms, 20-25 miles N. 
and N.N.E. of Unst. 
—— Skenei (Ellis and Sol.)= Cellepora Skenei, Busk, Marine Polyzoa, p. 88, 
pl. exxii. 40-70 fathoms, 5-10 miles east of Balta; also Out Skerries 
Haaf. 
lorea, Alder, Quart. Journ. Mic. Sci. vol. iv. (1864) p.104, pl. iii. figs. 5-7. 
80-100 fathoms, 20-25 miles north of Burrafirth Lighthouse. Certainly 
distinct from the last, with which it is united by Smitt. 
Retipora Beaniana, King. Occasionally on the Unst Haaf, down to 170 
fathoms ; abundant on the Out Skerries Haaf, but not so large as on the 
Northumberland coast. 
Suborder Cycnosromara. 
Crisia eburnea (Linn.). On Hydrozoa on haddock-grounds. 
Var. producta, Smitt, Ofvers. af K. Vet.-Akad. Férh. 1865, p. 116, 
pl. xvi. figs. 4-6. On stones, 100-170 fathoms. 
denticulata (Lamk.), On Zoophytes, Haddock-ground. 
—— aculeata, Hassall. ‘“ Tide-marks to Haddock-ground ” (Peach, 1864) ; 
“Shetland, Barlee” (fide Alder in litt.). 
Crisidia cornuta (Linn.). On rocks between tide-marks, 
Hornera borealis, Busk, Alder, Quart. Journ, Mic. Sci. vol. iy. (1864) p. 108, 
pl. iy. figs. 1-6, 80-170 fathoms, Outer Haaf, 
