348 ASYCHIS BICEPS. 



The gular bristles of the hooks are well developed, and the teeth are five to six. The 

 tips of the bristles have alternate spikes. 



G-rube holds that Fauvel's form {Maldane Sarsi) belongs to a variety — his Maldane 

 glebifex, var. transver si-ma culata, n. var., in which the anterior flecks of pigment are 

 developed dorsally, and form transverse bands at the posterior borders of the three anterior 

 bristled segments. They are most distinct on the first. 



Fauvel procured his specimen from Belle-Ile-en-mer, in 19 metres. 



Fauvel (1909) illustrates the variations in the crenations of the anal region from 

 Spitzbergen, the Azores, and two from Belle Isle (France). 



In Nolte's recent account (1913) of the Maldanids of the north and east seas the 

 text-figures of the crown of the hook are shown from the front, but such sketches, though 

 interesting, are less useful than lateral views in discriminating species. 



Genus CXXIX. — Asychis, Kinberg, 1866. 



Chrysothernis, Kinberg ; Sabaco, Kinberg ; Maldanopsis, Verrill. 



Cephalic plate somewhat long, with a short and broad lateral border, the keel short 

 and flat between the nuchal organs, which are somewhat large and curved. The posterior 

 or anal plate with a more or less notched border, and a deep fissure on each side. The 

 fifth bristled segment has a half-moon-shaped patch of glands. 



1. AsYCBis biceps? Sars, 1861. Plate CI, figs. 7 and 7 a — head and tail; Plate CVIII, 

 fig. 14 — hook ; Plate CX, figs. 6 and 6 a — bristles and hook. 



Specific Characters. — The cephalic plate is cut into two divisions, and the hind border 

 is serrated ; an accessory process on the border in front with notched edges on each side 

 of the median keel. Nuchal organ a curved groove on each side. The first bristled 

 segment has an anterior fold or border (collar), and the last two segments are devoid of 

 bristles, whilst the four in front of these are narrow and have very prominent glandular 

 masses at the feet. The brown colour of the anterior region is bold, but interrupted 

 (Arwidsson). The glandular belts and areas are somewhat like those of Maldane Sarsi. 

 Length 135 to 180 mm. The anal plate is broader dorsally than ventrally, with a marked 

 fissure in the mid-dorsal line, and a less marked gap in the mid- ventral line. The lateral 

 fissure is deep and wide at the bottom. The dorsal edge of the plate is indented by 

 shallow notches, which are not quite regular, four to six teeth and additional flat portions 

 occurring on each side. The ventral half of the cup or plate shows three or four shallow 

 indentations on each side of the mid-ventral notch. Between the dorsal and the ventral 

 notches is a median line, but no ridge. Anterior bristles with shorter and broader wings 

 and a curved tip, whilst others have longer and narrower wings. The posterior bristles 

 have much elongated hair-like tips with opposite spines. The hooks have very long, 

 curved shafts, and a marked shoulder. The neck is fairly long, the great fang prominent, 

 and the spikes on the crown little elevated. The tube of fine mud is thick, and lined by a 

 firm secretion. 



