ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 323 



understood, it is probable ' that the specimens here called cornea are 

 referable to squnmata. 



Clava dijfusa, Allman, Ann. Nat. Hist. 3rd ser. vol. xi. 1863, p. 8 ; Brit. 

 Assoc. Eep. 1862 (1863), p. 101. " Eock-pools, at low spring tides, 

 Out Skerries " (Allman). 



Tubidava cornucopia?, Norman, Ann. Nat. Hist. 3rd ser. vol. xiii. p. 82, pi. ix. 

 figs. 4, 5, =Merona cornucopia, id. ibid. 3rd ser. vol. xv. p. 262. On 

 Astarte sulcata and Dentalium entale, 20 miles north of Unst, in 80100 

 fathoms, 1863 ; St. Magnus Bay, and 5-8 miles east of Balta, in 40-50 

 fathoms on Dentalium, 1867. 



Hydractinia echinata (Fleming). 



Podocoryne areolata ( Alder) = Hydractinia areolata, Alder, Trans. Tyn. Nat. 

 Field Club, vol. v. p. 225. pi. ix. figs. 1-4, =~Rhizocline areolata, Allman, 

 Ann. Nat. Hist. 3rd ser. vol. xiii. (May, 1864). A specimen investing 

 the shell of Natica Grcenlandica found in 1863, 10 miles east of Balta, 

 in 73 fathoms. 



Coryne pusilla, G&rtner=Sarsia tubulosa, Forbes, Naked-eyed Medusae (the 

 gonosome), jide L. Agassiz. 



Tide-marks, Balta Sound, 1867 ; the ordinary form, and also a slender 

 Variety of the species. 



" nutans, Allman, n. sp. TropJiosome Hydrocaulus attaining a height 



of about 4 lines, much branched; branches subalternately disposed, 

 deeply and distinctly annulated, the annulations of hydrocaulus becoming 

 less distinctly marked towards the base. Polypites depressed on one 

 side of the stalk, so as to assume a nutant posture, ovate, with about 

 15 tentacula. Gonosome unknown. 



" Our ignorance of the gonosome renders the allocation of the present 

 hydroid in the genus Coryne a merely provisional one .... Its tro- 

 phosome resembles that of Coryne pusilla, but is smaller, while the hy- 

 dranths droop upon their stalks in a characteristic way not noticeable 

 in C. pusilla" (Allman in litt.). Found in 1863 in the caves atBurra- 

 firth, especially in Halse Hellyer, where it lives abundantly, with the base 

 of the hydrocaulus immersed in sponges which coat the sides of the cave 

 from extreme low- water mark to about half- tide. 



vermicularis, Hincks, Ann. Nat. Hist. Oct. 1866, p. 296. Shetland, 



from deep water " (Hincks). 



ramosa, Ehrenberg. Procured in 1863 ; the specimen identified by Mr. 



Alder. 



Syncoryne eximia (Allman). " Shetland, 1864, Peach "(fide Alder in litt.). 



Eudenclrium rameum (Pallas). 



ramosum (Linn.). 



annulatum, Norman, Ann. Nat. Hist. 3rd ser. vol. xiii. p. 83, pi. ix. figs. 

 1-3. The type specimens procured in 1863 in " Buness Hall," one of 

 the caves of Burrafirth, at extreme low water, spring tides. 



vaginatum, Allman, Ann. Nat. Hist. 3rd ser. vol. xi. (1863) p. 10; 



Brit. Assoc. Rep. 1862 (1863), p. 102. "Eock-pools, extreme low 

 water, spring tides, Shetland" (Allman); also 40-50 fathoms off Balta, 

 1867 (A. M. N.), the specimen determined by Prof. Allman. 



Coppinia arcta, Dalyell, or Sertularia abietina, Halecium halecinum, &c. 

 In a paper read this year (1868) at the Brit. Assoc. Meeting, Prof. 

 Allman showed that Coppinia is a Tubularian and not a Campanularian. 



Perigonimus minutus, Allman, Ann. Nat. Hist. 3rd ser. vol. xi. (1863) p. 11 ; 

 Brit. Assoc. Eep. 1862 (1863), p. 102. " Forming a fringe round the 



