''Genus Nolella (mihi). 

 "Cells erect, subcylindrical, springing singly, but closely, from an undefined polymorphous 

 "incrusting mat; tentacles eighteen, forming a bell. Name from nola, a little bell". 



The zooecia of N. stipata are described as being about 1/36 inch long, whitish and 

 sub-opaque; the opacity making it impossible to ascertain whether a gizzard is present or not. 

 The number of tentacles is stated to distinguish it from all recognised genera except Avenella. 



The emphasis laid by Gosse on the number of the tentacles, taken in conjunction with 

 his remarks on the opacity of the body-wall and with his figure (PI. IV, fig. 29) leave little 

 doubt in my own mind that the form described by him is identical with Cylindroecium giganten»/, 

 which Hixcks describes as possessing 18 — 20 tentacles. The conclusion that Cylindroecium must 

 be regarded as a synonym of Nolella thus appears to me in the highest degree probable. 



Nolella stipata had previously been noticed by Bcsk 1 ), with a reproduction of Gosse's 

 figure, in his original account of Farrella (Cylindroecium) gigantea. 



Representatives of the present genus have been described from Oriental waters by 

 various authors ; and it is probable that some of these belong to one or other of the two 

 species here considered. In several of these cases 110 description or figure is published; and I 

 must content myself with giving the following references to the accounts in question, without 

 attempting to decide to what extent they correspond with the species described in this Report : 



Cylindroecium papuense Kirkpatrick, 1888, "Pol. Port Phillip", Ann. Mag. Nat. Hist. (6) II, 



p. 20 (Victoria). 

 Cylindroecium giganteum Hincks, 1887, "Pol. Hydr. Mergui Archipelago", J. Linn. Soc, Zool., 



XXI, p. 128 (said to be indistinguishable from British specimens). 

 Cylindroecium giganteum Waters, 1910, "Rep. Mar. Biol. Sudanese Red Sea" "Bry. II", 



J. Linn. Soc, Zool., XXXI, p. 251 (diameter of stolon, 0.03 — 0.04 mm.). 

 Cylindroecium giganteum Thornely, 191 2, "Mar. Pol. Ind. Ocean", Trans. Linn. Soc. (2) Zool., 



XV, Pt 1, p. 157 (no description). 

 Cylindroecium giganteum Waters, 1914, ''Mar. Fauna Brit. E. Afr.", Proc. Zool. Soc, p. 854. 

 Cylindroecium dilatatum var., Kirkpatrick, 1890, "Hydr. Pol. China Sea", Ann. Mag. Nat. Hist. 



(6) V, p. 17 (no description; the mounted specimen (Brit. Mus. 89.8.21.67.), from Tizard 



reef, has deteriorated to such an extent that no conclusions can be drawn from it). 

 Cylindroecium dilatatum Thornely, 1905, HERDMAN's "Rep. Pearl Oyster Fish. G. of Manaar", 



Publ. by the Roy. Soc, Suppl. Rep. XXVI, "Polyzoa", p. 128 (no description). 

 Cylindroecium dilatatum Thornely, 1907, "Rep. Mar. Pol. Ind. Mus.'". Ree Ind. Mus., I, Pt 3, 



N° 13, p. 196 (spinous dilatations occur at the bases of the zooecia; — Mangalore, 26 — 31 



fathoms). 

 Cylindroecium dilatatum Waters, 1910, t. cit., p. 251 (the zooecium has numerous fine latitu- 



dinal lines; tentacles about 20 ; diameter of stolon about 0.02 mm.). 



1. Nolella papnensis Busk. (PI. IV, figs 10 — 20). 



Cylindroecium papuense Busk, 1886, Challenger Rep., Pt L, p. 38, PI. VIII, fig. 2. 



2 )*322. A. Stat. 50. Bay of Badjo, W. Coast of Flores, O — 40 Metres ; mud, sand and shells. 

 337. G. Stat. 71. Makassar, o — 32 Metres; mud, sand with mud, coral. 



1) Busk. G., 1856, „Zoophytology", Quart. J. Mier. Sci., IV, p. 94, PI. V, fig. 4 (= X. stipata). 



2) The specimens marked * «ere not examined as microscopical preparations. 



53 



