642 



MR J. T. CUNNINGHAM AND MR G. A. RAMAGE ON THE 



Fam. MagelonidjE. 

 Magelona papillicornis, Fritz Miiller. 



Mcva mirabilis, Johnst., Gat. Brit. Mus.; MTntosh, Fauna of St Andrews. 

 Magelona papillicernis, Fr. Miiller, Anneliden-fauna der Insel Santa 

 Catherina, Arch. f. Naturges., 1858 ; MTntosh, Z. f. w. Z., Bd. 31. 



This peculiar and interesting species is common at Granton, and is got in 

 abundance by digging in sand in the littoral zone. We have formed a special 

 family for it, as it cannot be admitted into the Spionidoe, with which it is most 

 nearly allied, or into any other family. It has a richly corpusculated blood, 

 contained in special vessels, a large flat praeoral lobe, and two long occipital 

 tentacles furnished with long movable papillae. These tentacles bear no cilia. 

 There is an anterior thoracic region, which is much more muscular than the 

 rest' of the body, flattened, and somewhat reduced in diameter {vide PI. 

 XXXVIII. figs. 6, 6 a, &c). 



Fam. Ariciid^e, Malmgren. 



The principal distinction between this family and the Spionidoe is the absence 

 in the former of the occipital tentacles, or cirri of the buccal somite. The family 

 is equivalent to the Aricice vera? of Oersted {Arch, f Naturges., x., 1844), with 

 the exclusion of Aonis, Grube, which is a synonym of Nerine. The family 

 includes the genera Aricia, Savigny, Scoloples (Bl&mviMe) , Oersted, and Theodisca 

 (Fr. Miiller), Claparede. 



Scoloplos armiger (Miill.), Blainville. 



Lumbricus armiger, Miiller, Zool. Dan., i. p. 22. 



Scoloplos armiger, Oersted, Ann. Dan. Consp., p. 37; Malmgren, Ann. Polych. ; 

 M'lntosh, Fauna of St Andrews. 



Abundant, burrowing in sand in company with Magelona. The anterior 

 somites bear chaetae only, without tubercles. Farther back there are both long 

 tubercles and simple branchiae, and the parapodia are approximated together 

 on the contracted dorsal surface. The anal segment bears a pair of long 

 filaments (figs. 7, 7 a, &c). 



Theodisca mamillata, Claparede. 



Got off Laminarian roots at the Birnie Rocks, near Granton Quarry. 



Specific Characters. — One pair eyes. Cephalic lobe, obtusely rounded. 

 Branchiae dorsal, commencing on 5th setigerous somite. Notopodium, consisting 

 of a single cylindrical process, in front of the base of which is a fascicle of long 

 capillary bristles. Neuropodium, a mammiform projection with a nipple-like 

 process at the end; on the anterior surface exteriorly are a row of capillary 



