I 



304 PROCEEDINGS OF THE ACADEMY OF [April, 



domed and terminated by sixteen large, soft papillse flattened against 

 one another in a circle at the base of the still retracted jaws. Surface 

 proximad of these papillae thickly covered with small cutaneous 

 papillae of three forms and sizes. The most numerous are tall, slender 

 cones (PI. XX, fig. 155a), the second are larger, low, truncate cones 

 (fig. 1556) arranged in eighteen or twenty longitudinal rows along the 

 muscle bands; the third are a few scattered and smaller papillae 

 (fig. 155c). All three kinds have a similar structure, with an apical 

 pore at which a pair of refringent fibers end, and containing a few 

 large sensory cells and a supporting framework. Jaws of the usual 

 falcate form, strong, black, clawlike with expanded, hollow bases 

 and an appendage consisting of a rod and a large thin, triangular, 

 basal wing supported by a thickened marginal rib (fig. 156). 



Color as preserved pale yellow. 



Stations 4,517, off Point Pinos Lighthouse, Monterey Bay, 750-766 

 fathoms, green mud and sand; 4,525, same locality, 222 fathoms, 

 soft gray mud; 4,527, same locality, 183-337 fathoms, hard sand; 

 4,528, same locality, 766-800 fathoms, soft gray mud; 4,574 (tyjDe), 

 off Cape Colnett, Lower California, Lat. 30° 35' N., Long. 117° 23' W., 

 1,400 fathoms. 



Glycera rugosa Johnson. 



Glycera rugosa Johnson, Pioc. Bos. Sci. Nat. Hist., XXIX, pp. 409-411, 

 PI. 10, figs. 101, 102. 



Owing to the complete retractibility of the branched gills of this 

 species, their presence is easily overlooked as was done on a former 

 occasion in hastily determining such a specimen from San Diego as 

 G. nana. Careful examination in direct sunlight always renders 

 visible the orifices through which the gills have been withdrawn. 

 Those from station 4,454 are marked with quadrate black spots. 



Stations 4,431, off Santa Rosa Island, 38-45 fathoms, varied bottom ; 

 4,454, off Point Pinos Lighthouse, 65-71 fathoms, green mud, sand 

 and gravel; 4,548, same locality, 46-54 fathoms, coarse sand, shells 

 and rock. 



Glycera longissima Arwidsson. 



Glycera lonqissima Arwidsson, Bergens Museums Aabog for 1898 (1899), 

 pp. 23, 24, PI. I, fiffs. 15, 19; G. chilensis Arwidsson, ibid., pp. 24, 25, 

 PI. I, figs. 20, 21. 



Arwidsson's two species are probably identical, as Ehlers has already 



indicated. This species is represented by a very large, practically 



complete example 305 mm. long and 8 mm. wide exclusive of the 



parapodia. Segments 230, a few of the most caudal and the pygidium 



missina'. 



