430 



ECHTNODERMS OF THE BRITISH ISLES 



terminal digit quite short. Alimentary canal forming a loop, 

 the ascending part united with the descending part by a trans- 

 verse vessel ; just behind the calcareous ring a well defined 

 thick-walled portion, a muscular stomach. Polian vesicle single. 

 Ciliated funnels rather scarce, only in one longitudinal series, in 

 the left dorsal interradius, and mainly in the anterior end. Cal- 

 careous ring with 12 pieces ; radialia perforated. Genital opening 

 as in inhcerens, in the point of one of the dorsal tentacles. Anchor 

 usually broader than the anchor plate (Fig. 262, 1) ; the hole 

 outside the central hole often divided into two or more smaller 

 ones ; besides there are generally some smaller, partly serrate holes 

 along the outer edge, which latter may also be more or less serrate. 

 Anchor and anchor plate conspicuously larger than in the other 

 north European species. ^ (Cf. the various enlargements in 

 Fig. 262.) Small C-shaped bodies in the skin. Colour red- 

 pinkish. Reaches a length of ca. 30 cm., more usually ca. 12- 

 20 cm. long, by a thickness of 5-9 mm. 



The variety makrankyra Lad wig, from the Mediterranean, 

 characterised by the considerable size of the anchors, up to 

 0-8 mm. long, has also been found on the Atlantic coasts of 

 France (Dinard). 



Development unknown. 



The species is know^n from the Scandinavian coasts, from 

 Trondhjem to Bohuslen, and in the North Sea down to Heligo- 

 land. It is also known from the Faroe Islands. Bathymetrical 

 distribution as L. inhcerens. 



[Leptosynapta Galliennii (Herapath).] (Fig. 263.) 



(Syn. Synapta sarniensis Herapath.) 



Very much like hergensis in regard to general shape and 

 anatomy, as also in colour and size. But it differs markedly from 



1 The average size of anchors and anchor plates in the north European 

 Leptosynapta species are as follows, measured in ^. (No such measure- 

 ments are given for L. minuta.) 



