6 Prof. M'IntosU's Notes from the 



tlie filaments (pi. xxi. figs. 20-22) ; nnd, lastly, he gives an 

 account of Sahella melanost'ujinn (pi. xxi. fij;s. 17-19). 



A large niciuoir on tlic structure of the Tubicolar Polyeh?eta 

 (ehicflv Saltellids and 8er[)uli(ls) was jjuhlished by Soulier* 

 (1891)*. It deals particularly with such forms as Sjti7'<yf/rn/)his 

 spal/anzani, N'iviani, Branchiomma vesiculosnni, iMontagu, 

 Sabella vio/a, Gruhe, Mtjxicola iiifnndibuluni, IMontagu, 

 aiul ^1/. rextfu'dca, CMaparede ; whilst amongst Serpulids 

 Proiiiht milhaci, Marion, Serpula infnndUmhim, D. Cliiaje, 

 and Hiidrohles pectinata, Miiller, were specially studied. 

 Interesting accounts arc given of some of these in captivity, 

 including the formation and structure of their tubes and 

 otiier features. His interpretation of the structure of the 

 anterior "nephridia" (periocsophageal glands) for the most 

 part agrees with that of Ed. ]\reyer. The histology of the 

 skin and other organs is described with great detail in 

 this paper, 



A memoir by Ed.iVleyert on the Sabellidoeand Serpulidai 

 (his Serpuliden) was published in Russian in 1893. A 

 careful account of the nephridia in Evpomatus and Psyymu- 

 brancJnts and the structure of the body-wall is given, along 

 with the structure of the nephridia in Sabellaria alveolata. 

 Late stages in the development of Psy//mobranchiis pro- 

 tensus further elucidate the subject. Like Soulier, he 

 describes and figures a ciliated funnel opening into the peri- 

 visceral cavity at the cephalic end of the anterior segmental 

 organs or thoracic glands. Since the work of Claparede no 

 investigator except Eisig has more fully dealt with the 

 structure of the Polyclnets, more especially of the Sabellids 

 and Seri)ulids, and his n)cmoirs in the Naples ' ]\[ittlieil- 

 nngen' J are models of }>atient research, skilful draughts- 

 manshij), and general accuracy. 



Otocysts were early described in the Sabellids by 

 De Quatrefages (1844) in an Amphicora, and, amongst 

 others, Clajjarede, Langerhans, Meyer, Brunette, De 

 St. Joseph, Caullery and Mesnil, Soulier, and Eauvel have 

 studied their occurrence in this group. The most compre- 

 hensive account is given by Fauvel § (1909), who describes 

 them in Branchiomma vesiculosam, in the first bristled 

 segment, in two species of Potamilla, viz. Potamilla reni- 



* Th(?se, ' Etud. sur I'Anat. des Anu^l. Tubic. de la Cette, Secret, du 

 Tube, &c.,' Montpellier, 1891. 



t ' Die Orf^aiiisatidn de Serpuliden u. Hermelliden,' Kasan, 1893, 3 pis. 



X E. y , Hd. vii. and Bd. viii. 



§ Ann. Sc. Nat. 9 ser. t. vi. ])p, 1-14}, pis. i.-iii. 



