68 



Posteriorly, the ventral hooks increase in size and strength, but 

 the dorsal tuft has the same arrangement as in front. 



In the intestinal canal is muddv debris, containing fragments 

 of Crustacea, sponge-spicules, diatoms, and other structures. 



The branchiae are, on the whole, more numerous than in the 

 British examples. 



Stimpson first found this form in the " circumlittoral zone," 

 at False Bay, Cape of Good Hope, and he describes it as 

 greenish or reddish brown, nine inches in length, and having a 

 breadth ol -45 inch. He points out that the ulterior bristles 

 (except anteriorly) are short, stout, and arranged in groups of 

 three. Schmarda gives the examples he procured at Table Bay 

 a violet colour. The specimens obtained by the " Challenger " 

 came from Sea Point, near Cape Town. Langerhans* met 

 A\ith this species, three cm. long, in the Canaries, whilst 

 Marenzellerf includes it in his account of the Annelids from 

 Angra Pequena. He notes that Stimpson's form is the same, 

 and, therefore, that his title should have priority to Schmarda's, 

 but this is now of less consequence, since the form is identical 

 with O. F. Miiller's. 



CiRRATiLUS TENTACiLATrs, Montagu, 1808. 



1808. TcrcbcUa icntaculatd, Montagu, Linn. Trans, ix., p. no. 

 1834. Cirniinhi^i Laiiuiirki/, Audouin and Edwards, Annel. 



p. 271, PI, VII., figs. 1-4. 

 1865;. Ciiratiiliis icntaculatus, Johnston, Cat. B.M., p. 209. 

 1868. Aiiiloiiinid filiilcra, Claparede, Ann. Nap. p. 267, PI. 



XXIII., fig. 3. 

 1889. Cirnifiihis fciiinciihdiis, var. iiicriilioiidlis, Marenzeller, 



Zool. jahrb. iii., p. 16 (sep. abdr.) Taf. I., hg. 7A. 



This form takes the place of the British C. tciiliuiilatiis dwd is 

 larger than the preceding. 



The head is bluntly conical and devoid of eyes. The peristom- 

 nial and the succeeding segments have similar proportional 

 breadth. 



The body is elongate, measuring from three to five inches in 

 length, tapered at either extremity, and furnished with numerous 

 long, slender cirri. The first cirrus is attached above the fourth 

 bristles, ;uid another is over the fifth and sixth respectively ; then a 

 dense group occurs in a tran.sverse series to the inner side of 

 the latter, a short gap in the middle line separating the two 



* Nova Acta. Bd. xlii., Xo. 3, p. 115. 

 t Zool. Jalirb. iii., p. H) (sep. adr.). 



