14 BOTRYLLID^. 



the whole being grouped closely together. Each cone is composed 

 of a fascicle of individuals, varying in number from five or six to 

 ten or twelve, and forming a margin round a depressed centre. 

 The whole mass is translucent, gelatinous, and of a rich amber or 

 orange colour ; the individuals are somewhat paler, but marked 

 by dark visceral specks ; they partake of the characters of those 

 of Si/noicum and Aiylidium, resembling the former in the struc- 

 ture of their stomach, and the latter in their branchial sac. Each 

 has an 8-toothed branchial orifice, and a simple tubulose vent 

 folded against the thorax. The ovary is peduncled, and very 

 conspicuous at the extremity of the animal. 



S. TURBiNATUM, Savjgny. 



Mem. pt. ii. p. 238. Flem. Br. An. p. 469. 

 Plate A, fig. 2, and plate B, fig. 2. 



The above description is taken from this species, which occurs 

 abundantly on the under surface of shelving rocks, exposed at 

 low-water during spring-tides, on the north coast of the Isle of 

 Man, isle of Islay, Dr. Fleming ; Strangford Lough, W. Thomp- 

 son ; Belfast Bay, Dr. Drummond. Dr. Leach probably procured 

 it on the south coast of England. 



POLYCLINUM, Savigny. 



" Mass sessile, gelatinous, or cartilaginous, polymorphous, com- 

 posed of more or less multiplied systems, convex, radiated, each 

 having a central cavity, and being more or less distinctly circum- 

 scribed. Individuals (ten to one hundred and fifty) placed at 

 very unequal distances from a common centre : branchial orifice 

 G-angled and 6-rayed ; anal prolonged horizontally, irregularly 

 cut, and aiding in forming the prominent and fringed border of 

 the cavity of the system." — Savigny. 



P. AURANTiUM, Mihie-Edwarcls. 



Mem. Asc. Comp. p. 292, pi. 1, fig. C. 

 Plate A, fig. 3, and jilate B, fig. 3. 



" Little orange masses, more or less spherical, fixed to rocks by 

 a short and thick peduncle ; the animals composing them undis- 



