1866. 



a 



1867. 



)> 



1868. 



)> 



1869. 



» 



204 CAEINBLLA ANNULATA. 



1846. Meckelia trilineata, Johnston. Ann. Nat. Hist., vol. xvi, p. 435. 



„ Valencinia ornata, De Quatrefages. Ann. des sc. nat., 3 me ser., Zool., torn, vi, p. 187, tab. 10, 



f. 4 and 5. 



1849. „ „ Ibid. Voyage en Sicilie, vol. ii, p. 99, pi. 10, f. 1—3. 



1850. „ annulata, Diesing. Systema Helm., vol. i, p. 244. 

 } , „ ornata. Ibid. Op. cit., p. 244. 



1853. Gordius anguis, Dalyell. Vow. Creat., vol. ii, p. 85, pi. 10, f. 7—10, and pi. 13. 



1854. Valencinia ornata, M tiller. Archiv, p. 83. 



1859. „ „ Leuckart. Archiv fur Naturges., ii, p. 187. 



1861. „ „ Grube. Ausflug nach Triest u. dem Quarnero, pp. 35 and 129. 



1862. „ „ Diesing. Revis. der Turbell., p. 252. 

 „ „ annulata. Ibid. Op. cit., p. 253. 



1863. Valencinia ornata, Diesing. Nachtrage z. Revis. der Turbell., p. 6. 



1864. „ „ Grube. Die Insel Lussin u. ihre Meeresfauna, p. 94. 



1865. Meckelia annulata, Johnston. Catalogue Brit. Mus., pp. 27 and 296-8, with woodcut, as 



in 1833. 

 „ Lankester. Ann. Nat. Hist., 3rd ser., vol. xvii, p. 389. 



„ Parfitt. Catal. Annel. Devon, p. 8. 



„ Mcintosh. Kept. Brit. Assoc, 1868, p. 340. 



„ Ibid. Trans. Roy. Soc. Edinb., vol. xxv, pt. ii, p. 372 et seq. 



Habitat. — Under stones near low water, in obscure fissures of rocks, and also dredged in 

 somewhat deep water. Often cast on shore amongst debris from the laminarian region. Gene- 

 rally diffused round the British coasts and the shores of France. In laminarian and coralline 

 regions it prefers tangle-roots, the inner surface of bivalve shells, or the tubes of Terebellce, 

 Serpulce, and other annelids. 



Body. — Seven to thirty inches long, and about a line in breadth, somewhat narrowed 

 behind the cephalic furrows, and gradually tapering to the tail. Dorsal surface rounded, ventral 

 flattened. 



Colour. — Various shades of brick-red, brownish-red or vandyke-brown (garnet-red, Montagu), 

 and with a very regular arrangement of white stripes. The snout usually has a patch of white, 

 with a crescent ic margin anteriorly and posteriorly, so as to be narrowed in the middle, with a 

 coloured portion in front. From the former a white central line proceeds backwards on the 

 dorsum to the tip of the tail. A short distance behind the ciliated furrows of the head a circular 

 white belt environs the body, and from each side of this ring a white stripe passes along 

 the lateral aspect to the tip of the tail. At certain intervals, only two of which in front are 

 distant, the body is encircled by white rings, which give a somewhat regularly segmented 

 appearance to the elongated worm. Posteriorly, indeed, they are often equidistant, and in many 

 there is a pale intermediate ring, sometimes faintly indicated by whitish pigment on the dorsum. 

 Every alternate white ring in most of the specimens is double ; that is, divided by a slight furrow. 

 Col. Montagu mentions 220 as the number of white rings after the third, and Sir J. Dalyell 

 counted 200 belts in a specimen eighteen inches long. There are likewise in many a series of 

 white specks above the lateral white lines, generally commencing at the fourth or fifth space behind 

 the cephalic furrows, though occasionally some occur on the third. These indicate for the most 

 part the points at which the products of the generative organs escape. The under surface is 



