394 Transactions. 



17. Cradactis magna (sp. nov.). 



I have not seen this species alive. I give the following notes of the 

 gross dissection of a preserved specimen : The base is adherent. The 

 column has about 100 rows of verrucae. The ectoderm is thick, and peels 

 off readily. Not only does the animal attach pieces of shell to itself, but 

 these even become imbedded in the ectoderm. At the oral end of the 

 column is a ring of foliose structures. The tentacles and disc are strongly 

 infolded, suggesting the presence of a powerful sphincter. The mesoglo?a 

 throughout the animal is thick and strong. The tentacles are very nume- 

 rous, and apparently in four rows ; each has a pore at the tip. There are 

 96 pairs of mesenteries, the first and second cycles being perfect, and each 

 apparently consisting of 12 pairs ; 2 pairs are directives ; all appear 

 normally to be fertile. In contraction the animal is 7 cm. high and 5 cm. 

 broad. Its size when expanded could not be less than 10 cm. in height, 

 and not much less in diameter. This species is found at Plimmerton. 



Since the above notes \vere prepared I have seen four specimens alive. 

 The column varies in colour, being respectively brownish-yellow, pinkish- 

 yellow, yellowish-green, and pale green in the four individuals respectively. 

 The disc is radially marked with brown streaks, with regular white patches 

 between. The tentacles are short, and arranged in four cycles. They are 

 bicoloured, being in three of the specimens deep purple at the proximal 

 end, bright claret at the distal end. In the fourth the colours were orange 

 and yellow. The number of lobes in the fronds is great ; they are dull grey 

 in colour, not so prominent as the same structures in C. plicatus. The pink 

 spot of C. plicatus seems to be represented here by a white one. The ver- 

 ruese are somewhat cylindrical. The stomodseum is white. There are 

 2 siphonoglyphs. 



Fam. BUNODID^. 

 Genus Bunodes (Gosse). 



18. Bunodes aureoradiata (sp. nov.). 



This is fully described in this volume at p. 368. 



Distribution. — Of the genus — Norway, English Channel, Atlantic, Medi- 

 terranean, Bahamas, Indian Ocean (Delage and Herouard) ; also New Zea- 

 land. Of the species — Wellington Harbour. 



19. Bunodes inconspicua (nom. nov.), Hutton. 



This species was named, by Hutton, Phymactis inconspicua. The ver- 

 tical arrangement of its verructe, however, gives it a place in the genus 

 Bunodes. 



Basal Disc. — Adherent, rather wider than the column. The ectoderm is 

 twice as thick as the mesogloea. The latter contains lacunae. 



Column. — Cylindrical, slightly widening towards the base. Verrucse m 

 vertical rows, long and short rows alternating. Towards the lower end 

 of the column they become less numerous and smaller, at last becoming 

 mere marks. The colour of the column is whitish below, olive-brown 

 above. The column closely resembles that of Bunodes aureoradiata. The 

 ectoderm and endoderm are normal, the latter containing zooxanthella?. 

 The mesogloea runs out into the ectoderm, taking part in the constitution of 

 the verrucse. Under the tentacles is a ring of white tubercles or " mar- 

 ginal beads," each one being placed at the top of a vertical row of warts. 



Tentacles. — These are placed in four cycles, and are about 120 in number. 

 The largest is equal in length to the diameter of the disc. They are conical. 



