208 TEREBELLA. 



tity, several being produced by the same parent. One albuminous mass, 

 tending to a globular form, whereon eighty or more ova "were imbedded, 

 was lodged by a specimen amidst its web. Other masses, produced by 

 the same animal, and by a different specimen, were lodged both amidst 

 the web and elsewhere, fig. 17. 



None of the spawn proved fertile. Further observation must deter- 

 mine the precise form of the branchiae, and other peculiarities of confor- 

 mation ; also whether the species ever constructs an entire tube ; and 

 further, whether there is any connection between the production of the 

 web, and the perpetuation of the race. 



PLATE XXVIII. 



FIG. 15. Terebella textrix The Weaver enlarged. 



16. Mass of spawn lodged amidst a web. 



17. The same spawn, enlarged. 



18. Portion of spawn, magnified. 



2. TEREBELLA PECTEN. Plate XXVI. Fig. 9. 



Length four lines, with long black bristles, forming pencils down the 

 sides. A wide thin lip in front. Tentacula about twenty. Branchiae 

 peculiar. A stout fleshy stem sustains the whole, which consists of four 

 members, two larger, two smaller, each composed of a rib, with prolong- 

 ed cylindrical and somewhat extensile subordinate organs from one side, 

 on the whole resembling four combs, with long flexible teeth. These 

 branchige testify considerable action. Colour of the animal reddish. 



Only one specimen occurred, which had quitted its dwelling. Nor 

 did it construct a new one when supplied with sand and earthy matters, 



PLATE XXVI. 



FIG. 9. Terebella pecten, enlarged ; branchiae a, 



