54 K. J. Bush — Ttvo genera of tubicolous Annelids. 



Yermilia has become a kind of dumping ground for ill- 

 defined, little understood, often unfigured forms, even some- 

 times for the empty tubes themselves. As more material has 

 been studied, the species thus becoming better understood, the 

 animals in many instances have been found to agree only in 

 having a more or less bulbous operculum on a simple stemlike 

 peduncle, capped by a horn -colored chitinous end (see Langer- 

 hans, Marenzeller, Ehlers, Moore). Comparative studies of 

 other characters have revealed tangible differences, showing 

 that even this interpretation, often designated as the Yermilia 

 of Philippi, has been too laxly applied, necessitating the estab- 

 lishing of new genera, as follows : — 



Vekmiliopsis Saint-Joseph '94, restricted, — type V. infun- 

 dibulum Philippi '44, as Yermilia, figure, not of authors. 

 See p. 56. Mediterranean Sea. 



The uncini have about 13 angular closely appressed teeth 

 (in profile), the last one large and truncated. The abdominal 

 setae are strongly bent at the base of the rather broad angular 

 tapered blades. 



.Metaveemilia Bush '05, — type M. midticristata (Philippi 

 '44, as Yermilia, figure + Marenzeller '93, as Yermilia, fig- 

 ures) Bush. Mediterranean Sea. 



The uncini approach the form of those characteristic of the 

 genus Protula and have about 18 sharp closely appressed 

 teeth, the last one long, slender and curved. The abdominal 

 setae are but moderately bent, with broad abruptly tapered 

 blades. 



Paeavebmilia Bush '05, — type P. bermudensis Bush '05. 

 Bermuda. 



The uncini with about 15 sharp appressed teeth, the last one 

 large and truncated and more prominent. The abdominal 

 setse are but little curved, with long angular regularly tapered 

 blades. Thoracic membrane forming a 3-lobed collar and lateral 

 border to about the fifth segment ; no posterior border. 



Pseudoveemilia gen. nov., — P. occidentalis (Mcintosh '85, 

 as Spirobranchus, figures) Bush. Bermuda. 



The uncini with about 13 closely appressed teeth, the last 

 one prominent, large and bifid on end. The abdominal setae 

 bent, with long, angular abruptly tapered blades. Thoracic 

 membrane forming a 3-lobed collar only, without lateral and 

 posterior border. — 



Specimens of Yermilia triquetra Linne {Pomatoceros tri- 

 queter Morch) in the Yale Museum from Denmark are of good 

 size, twice as large as Y. triquetroides (Delle Chiaje), with 7 

 thoracic and about 70 abdominal segments, the branchiae and 

 peduncle beautifully banded with blue. There are 16 rather 

 short, stout branchiae in each lobe, connected by a basal mem- 



