1909.] NATURAL SCIENCES OF PHILADELPHIA. 293 



near Monterey Bay, at a depth of 40 fathoms, by Prof. Harold Heath. 

 A single example appears in the Stanford University collection, and 

 was taken by a Chinese fisherman on a red-cod line in the vicinity 

 of Monterey Bay on February 20, 1902. 



Several species of Protula have been described from the Pacific, and 

 it is possible that P. atypha Bush or some of the other smaller species 

 may be the young of this, but they have far fewer branchial rachises. 

 Indeed this species departs from typical members of the genus in the 

 large number of rachises and complexity of the gill-bearers or bases. 



Serpula Columbiana Johnson. 



Serpula columbiana Johnson, Proc. Bos. Soc. Nat. Hist., XXIX, pp. 432, 

 433; PI. 19, figs. 199-204. 



"Lighthouse Point," vicinity of Monterey Bay, in a big tide pool, 

 June 28, 1904. Three medium-sized specimens with portions of tubes. 



The operculum is more slender and has a more finely serrated margin 

 than the one figured by Johnson. One counted had 140 serrations 

 and ribs and 38 pairs of branchial rachises. 



HERMELLID^J. 

 Sabellaria californica Pewkes (Plate IX, figs. 66a and b). 



Sabellaria Californica Fewkes, Bull. Essex Inst., XX (1S89), pp. 130-132; 

 PI. VII, figs. 3 and 4. 



Only two specimens from San Diego are contained in the collection. 

 In the vicinity of Monterey Bay the species appears to be more abun- 

 dant, specimens being present from "Lighthouse Point," June 28, 1904; 

 "big tide pool," June 20, 1905, and Delmonte wharf, dredged July 12, 

 1904. 



The degree of pigmentation differs greatly, some being pale, others 

 deep brown, the latter type strongly prevailing. 



This species is readily distinguished from the next by the character 

 of the opercular spines, which, with the exception of those of the con- 

 cealed inner series, are opaque, dark brown or black. The exposed 

 parts of the outer series are erect, of the inner and middle series 

 recumbent, whereas in S. cementarium the yellow spines of all three 

 series are more or less erect, those of the middle series being very 

 prominently so. The exposed parts of both the inner and middle 

 series of this species are placed at right angles to the slender stem or 

 tendon. The long, pick-like spines of the middle series (fig. 66a) are 

 very hard and the pointed, slightly hooked tips frequently interdigi- 

 tate and cross in the middle, completely concealing the inner whorl. 

 The latter (fig. 66o) are much more delicate, flattened, yellow, some- 



