234 BUSH 



The operculum has the basal processes nearly equal, smaller and 

 somewhat tapered, and the distal end of the peduncle but slightly con- 

 tracted. A delicate alga, a species of Ectocarpus, completely covers 

 the anterior end. There is no secondary operculum on the type ; a 

 specimen from Wrangel, however, has two fully developed ones, to 

 only one of which the Ectocarpus has become attached. 



Length about 60 mm.; branchiae about 6 mm. ; breadth of abdo- 

 men 3 mm. ; of thorax 4 mm. ; diameter of operculum 3 mm. 



Tube thick, calcareous, but slightly twisted. 



Wrangel, June 5, one specimen ; Dutch Harbor, July 8, one speci- 

 men. Said to be very common. 



CRUCIGERA IRREGULARIS sp. nov. 

 pi. xxv, fig. 5; pi. xxix, fig. 4; Pi. xxxin, fig. 13; pi. xxxix, figs. 1-5. 

 Type locality. Juneau. 



Color pinkish, the branchiae and operculum banded and mottled with 

 bright crimson. 



This species differs from the two preceding ones in having longer 

 branchia, their rachises with comparatively short terminal filaments ; 

 but especially in its operculum, which is irregular in form, laterally 

 elongated, with about 32 broad radii, which form a thick scalloped 

 edge, which rolls over along the longer and deeper portion. Only 

 one large, broadly rounded, somewhat bilobed process is developed at 

 one side of the base, to which the abruptly contracted distal end of the 

 long stout peduncle is attached ; secondary operculum very slender, 

 club-shaped. 



Length about 48 mm. from base of branchial lobes ; breadth of 

 thorax 4 mm. ; longer diameter of operculum 4.5 mm. 



Tube thick, calcareous, solitary, attached to a shell. 



Juneau, July 6, one specimen. 



EUPOMATUS GRACILIS sp. nov. 



pi. xxvn, fig. 9 ; pi. xxxiv, fig. 25 ; pi. xxxvn, figs. 26, 27. 



Type locality. Pacific Grove, California. 



Branchial lobes similar to those of Serpula, but not so prolonged 

 ventrally, turning inward but little, the branchiae (18 in each lobe) 

 not extending backward along the end of the lobe, as in Serpula. 



Operculum deep funnel-shaped, tapering regularly into its peduncle 

 without basal enlargement or processes, with comparatively few regular 

 radii forming deep sharp serrations (about 35) on the margin, and 



