PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 189 



The distal angles are prolonged into a single, stout, often short spine on 

 each side, frequently absent on the inner angle. Avicularia on the 

 middle of the front side of the zooecia, toward the base ; they have a 

 short, broad, swollen head, with a short, strongly curved beak ; the pedi- 

 cels are short and thick, rapidly enlarged from the base upward. Ocecia 

 large, globose, brilliantl}* iridescent, elegantly sculptured, with a series 

 of raised curved lines passing up over each side and converging to the 

 middle of the front side, while their concave interspaces are covered with 

 microscopic transverse lines. Dredged at Eastport, Me., by the writer. 

 and also in the Gulf of Maine, 110 fathoms, near George's Bank, by Dr. 

 A. S. Packard and Mr. C. Cooke, in 1872 (U. S. Fish Commission). 



The other species of BiiguJa found on the Kew England coast are as 

 follows : 



BugvJa tnrrita (Desor) Verrill. Florida to Casco Bay. 



BiiguJa avicvJaria (L.) Oken. Long Island Sound to Spitzbergen: 

 Europe. 



Bugula Jlustroides (Lamx.) (= B. Jlahellata Gray). Long Island Sound 

 to Maine ; Europe. 



Bngula fastigiata (L.) Alder { = B. plumom, Busk). Massachusetts 

 Bay to Labrador ; Europe. 



Bugula Murrayana Busk. Long Island Sound to Spitzbergen ; Europe. 



B. Murrayana., yav. fruticosa (Packard). Massachusetts Bay to Spitz- 

 bergen. 



Bugula fiexilis VerriU* and Bugula umbella Smitt belong to the genus 

 Kinetoshias Dub. and Koren. Both occur in. deep water off Maine and 

 Nova Scotia. 



Bugulella fragilis Verrill (Amer. Jour. Sci., xvii, p. 472, June, 1879). 



A peculiar genus, in which the branches are composed of a single 

 series of cells, connected together by small and short joints. Zooecia 

 with an oval frontal area, surrounded by spines. 



Oif George's Bank, 220 fathoms, on Acanella. 



CELLULARIDiE. 



Notwithstanding the very numerous restrictions which the ancient 

 genus Cellularia has undergone, it is still made to include heterogeneous 

 species by several recent writers, while others restrict it to groujjs not 

 originally included by Pallas. In the excellent memoirs of Smitt on the 

 Arctic Bryozoa, five species still remain in the genus Cellularia. These 

 belong, however, to three well-marked groups, some of which have 

 received several generic names, so that their synonymy is very compli- 

 cated. Having had occasion to revise this family, I ofler the following 

 summary, so far as it concerns the New England species. 



* See American Jour. Science, ix, p. 415, pi. 7, fig. 1, 2, 1875; and vol. xvii, p. 259, 

 1879. 



