liOTRYLI.OIDE.S ROTll'KKA. 88 



<). Botrylloides rotifera Milne Edwards.* 

 (Figs. 131 and 132.) 



[Botrylloides rotifera MILNE EDWARDS Obs. Ascidies comp. 

 (1841), p. 85, in Mem. Acacl. fici. Inst. France, XVIII 

 (1842), p. 301, pi. vi, f. 1, and pi. vii, f. 1 ; COCKS in Rep. R. 

 Cornw. Polyt. Soc. for 1849 (1850), p. 74; RUPERT JONES 

 in Cyclop. 'Anat. IV, pt. 40 (1850), p. 2019, f. 783; 

 THOMPSON Nat. Hist. Ireland, IV (1856), p. 363; WOOD- 

 WARD Man. Moll. pt. 3 (1856), p. 341, pi. xxiv, f. 9. 



Botn/llns rotifera THOMPSON in Ann. Nat. Hist. (1) XVIII 

 (1846), p. 386. 



Botrylloides rotifer H. & A. ADAMS Gen. Recent Moll. II 

 (1858), pi. cxxxiv, if. 2, 2 a; BRONN Thier-Reichs, III 

 (1861), pi. xiv, if. 23, 24.] 



[Colony (fig. 131) gelatinous, thin and spreading, 

 yellowish in colour; individual* with semi-transparent 



FIG. 131. Botrylloides rotifera. Natural size. (M. Edwards, pi. vi, f. 1.) 



tunics, numerous and irregularly scattered, their bran- 

 chial apertures eight-lobed and with a double ring of 

 little red spots around them. 



Diameter of mass about an inch (25 mm.) or less. 



Jftib. On the under surface of stones and on stems 

 of the young Fucus sermtus (Codes). 



ENGLAND. Falmouth, Cornwall (Cocks). 

 IRELAND. Springvale, Down (Thompson). 

 First record- -Thompson, 1846. 



Milne Edwards says that this species is composed 

 of irregular systems (fig. 131) with very numerous 



* In the authors' MS. the name only (Botrylloides rotifera) occurs. 



