Gatty Marine Laboratory, St. Andrews. 7 



formis and P. forelli, in Amphiglena mediterranea, three 

 species oiJasmineira, viz. J. caudata, J. oculata, and J. eleyans, 

 in Myxicola infimdibulum and three other species of Myxi- 

 cola, in three species of Chone, viz. C. duneri, C. arenicola, 

 and C. collaris, in Euchone rosea, Dia/ychone acustica, in O/'ia 

 armandi, and Orcopsis metchnikoivii. In this family they 

 occupy the first bristled segment and the}' are innervated 

 from the oesophageal collar. As in other annelids, Fauvel 

 considers that these organs perform the function of stato- 

 cysts, for perceiving vibrations, and are, perhaps, also organs 

 of orientation. 



Numerous instances of the regeneration of both extre- 

 mities have been recorded in the Sabellids. Thus, Dalyell * 

 observed the reproduction of both ends in Sabella pavonia 

 (his Amphitrite ventilabrwrn). Grube and De St. Joseph 

 subsequently found a similar condition in the same species. 

 C. Vauey and A. Conte t described regeneration after experi- 

 ments in Spirographis spallanzani. Ivanow J and Orlaudi § 

 respectively studied the same species in regeneration. 

 Grube || found renewal of the anterior region in Potamilla 

 reniformis and De St. Joseph ^[ in P. forelli, with regenera- 

 tion of the branchiae in Myxicola dinardensis and in Dasy- 

 chone bombyx. Soulier **, again, describes regeneration of 

 the branchiae in Branchiomma vesiculosum. 



One of the most complete accounts of the regeneration of 

 the anterior and posterior ends of a sedentary annelid is 

 that of P. Ivanow % (1908) in Spirographis spallanzani. 

 Both text and figures are full of interest — especially as 

 regards the nervous system and segmental organs. Many 

 authors, however, describe bifid posterior ends of other 

 species. 



The Sabellidre, like the Terebellidse, are stated by 

 Dr. Goodrich -j-f to possess nephiidia which open internally, 

 and that the genital funnel becomes connected with the 

 nephrostome and loses its primitive opening to the exterior. 



An account of the "cartilaginous" substance in the 

 branchiae of Spirographis spallanzani, Branchiomma kollikeri, 

 Sabella renifo?'mis, and Sabella infundibulum is given by 



* 'Powers of the Creator,' vol. ii. p. 225 (1853). 



t Bull. Mus. Hist. Nat. t. xiv. (1908). 



\ Zeit?ch. f. w. Zool. Bd. xci. p. 511, Taf. xx.-xxii. 



§ Aicliiv. Zool. Napoli, vol. iii. 2 tig. (1906). 



|| ' Ein Ausflug-Triest u. Quarnero,' 1861. 



% " Armel. Dinard," Ann. Sc. Nat. 7 ser. 

 ** Trans. Instit. Zool. Montnelier, 1891. 

 ti Quart. Journ. Micros. Sc. vol. xliii. n. s. p. 740. 



