246 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXV 



along the median line, always sharply defined, to disappear into a 

 deep slit between the two dorsal collar lobes 



Collar setse tufts very small, arising along a short, nearly hori- 

 zontal line. Remaining thoracic tufts also small but arising from 

 vertical lines, somewhat nearer the dorsal than the ventral mid- 

 line. Thoracic tori scarcely elevated, their length not exceeding 

 one-eight of circumference, the dorsal ends slightly overlapping 

 setse tufts. Abdominal parapodia are still smaller, the setse tufts 

 midway between dorsum and venter and the tori, which lie im- 

 mediately dorsad of them about one-third as long as the thoracic 

 tori. All parapodia are situated at the interannular grooves. 



Collar setse are all broken but appear to be of the dorsal type 

 found on remaining thoracic segments. These consist of a large 

 dorsal group of long, very slender capillary setse and a ventral 

 group of spatulate setse, the former usually with a slight sigmoid 

 curvature and unequally narrowly bilimbate, the wider limbus, 

 which nowhere exceeds the diameter of the stem, striated, the end 

 alimbate for a considerable distance. The latter (Plate XVIII fig. 45) 

 are stouter, broadly paddle-shaped and without trace of a mucron, 

 though the stems extend to the ends of the strongly striated blades. 

 In lacking any mucron they resemble the spatulate setse of Meta- 

 chone mollis but most of them are much broader than figured bj^ 

 Miss Bush and more nearly of the proportions of typical Chone. 

 Abdominal setse form very small fascicles of minute setse, in general 

 resembling the dorsal thoracic except toward the caudal end 

 where they become much elongated and of the strictly capillary 

 type. Thoracic crochets (Plate XVIII, fig. 46) are arranged in a 

 crowded, irregular, rank or partially in two ranks. They have long, 

 slender, slightly curved shaft, head bent at nearly right angles to the 

 shaft, with rather slender unstriated beak and small, low crest of 

 numerous slender striated teeth. Abdominal uncini of the Terebellid 

 form, with quadrate bases not prolonged backward, a deep notch 

 and long slender beak with a few teeth in the very small crest. 



Except that the gills are lacking both specimens are well pre- 

 served. The type is 83 mm. long and 3.5 mm. in diameter, the 

 cotype measures 47 and 2 mm. 



Stations 4436, off San Miguel Island, 264-271 fathoms, green 

 mud (type); 4523, off Point Pinos Lighthouse, 75-108 fathoms^ 

 soft dark mud. ^ f'">'^'^ 



Jasminiera ecaudata sp. nov. 



Branchise arising in seven to nine dainty pairs from low, simple 

 branchiophores which do not appear beyond the collar. Radioles 

 free, without interbranchial membrane but provided on each 

 side with a narrow, free margin of increasing width and passing 

 into the distal barbless tip which is flattened and coiled like a 



