122 Thirty-second Report on the State Museum. 



Fam. CIRRATULIDJE. 



CIRRATULUS Lamarck. 

 Hist. Nat. des Animaux sans Vertebres, vol. v, p. 300. 1838. 



ClRRATULUS GRANDIS Verrill. 

 Verrill. Invert, An. Vin. Sound, etc., p. 606, pi. xv, figs. 80, 81. 1874. 

 Webster. Annel. Onset, of the Virginian Coast, p. 258. 1879. 



Rare ; only one specimen was taken. 



CIRRHINEREIS Quatrefages. 

 Histoire Naturelie des Anneles, vol. i, p. 462. 1865. 



ClRRHlNEREIS FRAGILIS Qlffg. 



Cirrhatulus fragilis Leidy. Marine Invert. Fauna R. I. and N. J., p. 15, pi. xi r 



figs. 39-43. 1855. 

 Cirrhinereis fragilis Quatrefages. Op. cit., vol. i, p. 464. 1865. 

 Verrill. Op. cit., p. 607. 1874. 



Rare ; a single injured specimen was found which probably belongs to this 

 species. 



Fam. CAPITELLID^E. 

 NOTOMASTUS Sars. 



Reise i Lofoten og Finmarken, p. 199. 1850. 

 Fauna Littoralis Norwegian, p. 12. 1856. 



I have referred the following species to Notomastus Sars, although some- 

 what in doubt as to what constitutes a Notomastus. The following species of 

 this genus and of the allied or identical genus Ancistria have been reported 

 from our coast : Notomastus luridus Verrill, Notomastus filiformis Ver- 

 rill, Ancistria acuta Verrill, Ancistria capillaris Verrill and Ancistria 

 minima Quatrefages (reported by Webster). It is quite certain that these 

 five species belong to the same genus, but to what genus ? Certainly to Ancis- 

 tria Quatr., if it is a good genus. But Claparede says "that Ancistria 

 is a synonym of Capitella. But so far no one has seen the peculiar male 

 sexual organs and setae upon which so much stress is laid as characteristic of 

 Capitella. Prof. Verrill writes that he has never found them ; I have never 

 let a specimen pass without looking for these organs, but to no purpose. Ac- 

 cordingly, while our specimens belong to Ancistria, they do not belong to 

 Capitella. It will be noticed that two of our species have been referred to 

 Notomastus ; and in fact they cannot be said to differ from Notomastus ex- 

 cept in the length, and number of setae, of the ventral rami. But Claparede, 

 speaking of the "tores hamiferes ventraux," says (Glanures, p. 58): "Le de- 

 veloppement extraordinaire des tores ventraux du cote dorsal est meme le carac- 

 tere essentiel des Notomastus," according to which dictum not one of our species 

 is a Notomastus, as they have not the elongated ventral rami and numerous 

 setae of the type species, Notomastus later iceus Sars. In regard to Arenia 

 Quatr., Claparede (Annel. Chet. du Golfe de N., p. 18) claims that is a No- 

 tomastus, and that the type species, A. cruenta Quatr., is Capitella (Noto- 

 mastus) rubicunda Keferstein. In this case one must believe that Quatre- 

 fages entirely mistook the character of the posterior dorsal setae, since he 

 describes and figures them as capillary. 



