298 Prof. :M'rnt05h's Notes from the 



AncistrosylUs grcenJandica^ M'lntosh. 



An incomplete exani])le of this species was dredged in the 

 ' Porcupine ' expedition of 1?^70, east of Cape de Gatte, 6 miles 

 from shore, at a depth of 60-160 fathoms. The specimen to 

 which the fragment pertained was evidently larger than the 

 original one procured in the cruise of 1 1. M.S. * Valorous ' in 

 1875*. The dorsal hook is remarkably strong at the curva- 

 ture towards the tip, and aj)parently fixes the body very 

 securely to other tissues, such as a tube or sponge. The 

 point of the hook also shows minute rough processes. The 

 shaft of the hook, which is boldly striated, diminishes from 

 the distal curvature downwards to the level of the skin, where 

 the narrowest part is, a dilatation then occurring in the 

 tissues of the foot. 



In the inferior division the smooth conical tip of the spine 

 projects beyond the surface, and in this specimen the ))apilla3 

 on the ventral cirri were very iaw and difficult to observe. 



4. On Norwegian Syllidaj collected by Canon Norman^ 

 n.C.L., F.R.S. 



Ehlersia cornuta, H. Rathke, var. 



Habitat. Procured by Canon Norman in Finmark. 



A fragment of the anterior end of a Sj/IUs, the head having 

 lon<T palpi, the tentacles di:<tinctly moniliform and of con- 

 siderable length. The cirri anteriorly had at least from 

 ei"-hteen to twenty segments, and they continued of this length 

 to the end of the fragment. 



The foot presented a slightly tapered dorsal cirrus of 

 eighteen to twenty segments. The conical setigerous region 

 ■was supported by two spines, the larger with its smoothly 

 conical tip projecting beyond the apex. The bristles were 

 comparatively slender, with shafts of the usual structure and 

 the upper with very long slender terminal pieces which 

 appeared to have a simple tip with a slight hook. Botli 

 .tliaft and tip of the upper bristles were remarkably slender 

 and the latter longj but though the approach of the marginal 

 spikes to the terminal hook caused an appearance which 

 resembled a bifid tip, yet, so far as could be ma<le out, no 

 condition of this kind obtained. The marginal spikes were 

 proportionally large and distinct. The lower bristles iiad 

 shorter and broader terminal pieces, and a minute secondary 



* The distribution of this peculiar form is thus extensive. 



