296. J. H. ASHWORTH. 



the excretory part of which is bent once upon itself; the 

 funnel is small. Dioecious^ gonads microscopic. 



Found in the temperate seas of the Northern and Southern 

 Hemispheres, and in the colder seas of Northern Europe. 



I. Body arenicoliform, prostomium more or less T-shaped, 

 the antero-lateral angles being drawn out to form short ten- 

 tacular processes. 



A. The parapodia of the segments behind the twelfth or 

 fifteenth project prominently at right angles to the body, 

 each forming a laminate appendage bearing a dorsal and a 

 ventral cirrus. Body often swollen anteriorly. 



1, So ali bregma. — Gills present on the anterior seg- 

 ments. 



S. inflatum, Kathke (Oligobranchus roseus, 

 Sars). Four pairs of gills in chsetigerous segments 

 2 — 5. Four anal cirri. 



S. brevicauda, Verrill. Four pairs of gills on seg- 

 ments 2 — 5. No anal cirri described. 



S. (?) abyssorum, Hansen. Anterior part only 

 known, from one specimen. Three pairs of gills on 

 segments 2 — 4. The prostomium bears very short 

 tentacles. 



2. Pseudoscalibregma. — No gills. No anal cirri de- 

 scribed. 



P. longisetosum. (Eumenia longisetosa, 

 Theel.) The eleventh or twelfth and following 

 parapodia bear cirri. 



P. parvum. (Scalibregma [?] parvum, Hansen.) 

 Cirri present on the parapodia of the twelfth and 

 following segments. This may be a young form of 

 the preceding species. 



P. reticulatum. (Eumenia reticulata, Mcin- 

 tosh.) Cirri on the fifteenth and following seg- 

 ments. 



B. The parapodia do not form laminate appendages, and 

 are without dorsal cirri. Ventral cirri, if present at all, are 

 digitiform and confined to the posterior region. Each para- 



