Polyzottj Coelenterata, and Sponges. 445 



Vibracular cells and rooting-fibres absent from terminal inter- 

 nodes. 

 . A small colony, 6 millim. high, on Escharoides Sarsi. 



Gemellaria loricxdata^ Linne. 

 (PI. XXI. fig. 1.) 



CdluUtria loriculata, Pallas, Elench, Zooph. p. 64. 

 GemmeUaria lormdata, Van Beneden, Recherches Bryoz. p. 33, pi. v. 

 figs. 1-6. 



Has the form depicted in Van Beneden's figm*es [l. c.) : the 

 slight lamina extending across the lower end of the opening, as 

 there given, but omitted in all other representations which I 

 have seen, is present here and adds to the beauty of the 

 species. The cells are long, as in the same figm'cs. 



Bugula Murrayana, var. fruticosa, Packard. 



Menipea fruticosa, Packard, Canad. Nat. Tiii. p. 409, pi. i. fig. 3. 

 Bugula Murraijmia, var. fruticosa, Hincks, Hist. Brit. Mar. Pol. p. 93, 

 pi. xiv. figs. 3, 5. 



Some fragments agreeing generally with the best-known 

 form of this variety, viz. that with 2 to 4 series of cells in its 

 dichotomously dividing branches. The outer upper angle of 

 the cells is sharply angular rather than spined ; generally a 

 spine on each side a little below the top, never more than one. 

 Avicularia of the smaller size only. The cell- characters 

 agree well with those of Busk's fig. 1, pi. xii., Journ. Linn. 

 Soc. XV. 



Flustra carhasea^ Ellis & Solander. 



Flustra carhasea, Ellis & Solander, Hist. Zooph. p. 14, pi. iii. figs. 6, 7. 

 JEschara 2Mpyrea, Pallas ?, Elench. Zooph. p. 56. 



A few of the cells are decidedly subrhomboidal as seen 

 from the back of the frond ; hence, perhaps, Pallas's descrip- 

 tion of the cells in his specimen as being rhombic ; for the 

 description agrees well in its other points, except that of 

 " apice superiori truncato," with this species. 



A fine colony attached to a valve of a bivalve shell. 



Flustra securijrons, Pallas. 



Eschar a securifrons, Pallas, Elench. Zooph. p. 66. 

 Flustra securifrons, Smitt, CEfv. Akad. Forh. 1867, p. 378, pi. xx. 

 figs. 6-8. 



A fine colony. The branches are decidedly dilated at their 

 tips. But one ovicell was observed in the whole colony ; so, 

 though probably others were present, they are scarce. 



Ann. & Mag. N. Hist. Ser. 5. Vol. vii. 33 



