164 LAPHANIA BOECKI. 



a series of moderately elongated grooved tentacles. A small tongue-like process lies in 

 the pit below the mouth, whilst the lower lip is thick and curved. Ditlevsen describes 

 the cephalic lobe as provided with a somewhat prominent margin, which has a straight 

 edge and is beset with eight small rounded papillae. 



The body is slightly dilated anteriorly, remains for some distance of nearly the same 

 diameter, and then gently tapers to the tail. In the preparations the anterior end is 

 generally curved ventrally so as to resemble a Maldanid, as indeed the firmness, the 

 ventro-lateral ridges and the posterior segmentation also do. It is rounded dorsally, 

 flattened ventrally anteriorly, and grooved posteriorly, where the segments are marked 

 by deep dorsal furrows. Following the buccal are two somewhat narrow segments, each 

 having a setigerous process, and a glandular ventral scute or belt. Ten scutes follow, the 

 last separated by an interval. Then the median ventral groove continues to the posterior 

 end. Ditlevsen mentions that from the second to the fifth bristled segments are rudimentary 

 ventral processes without armature. The hooks begin on the seventh bristled segment. 



Seventeen setigerous processes occur on each side carrying pale golden bristles, and 

 they are conical when viewed from the dorsum, obliquely truncated at the tip when 

 viewed laterally. They commence on the third segment. The bristles are in two series— 

 a longer and a shorter. The former are long, slender, translucent bristles, the free part 

 being apparently cylindrical to the commencement of the wings, but the shaft is actually 

 slightly enlarged till it almost reaches the base in the tissues. The tip is comparatively 

 short, finely tapered, and the wings are distinct. The shorter forms (Plate CXXVI, 

 fig. 6) have shafts very slightly less than the foregoing, and only their ends project 

 beyond the skin, the wings commencing at once and dilating into broad expansions, 

 whilst the short but finely-tapered tip is curved at an angle. 



The rows of hooks commence on the seventh setigerous segment, though in one 

 examined it was on the eighth counting from the first (small) setigerous papilla. The 

 anterior hooks have, in lateral view, three or four teeth above the main fang (Plate 

 CXXVI, fig. 6 a), a posterior outline curved toward the crown, then a hollow, and a 

 projection above the posterior long ligament. The deep base is convex inferiorly, and 

 the anterior outline has a process under the main fang. The figure of Malmgren is 

 incomplete, though it is correct as far as it goes; that of Ssolowiew is not well 

 finished. 



The crowns of the posterior hooks (Plate CXXVI, fig. 6 b) are higher than those in 

 front, and are more nearly in accordance with Malmgren's figure, five or six small teeth 

 being above the main fang, and the posterior basal process is represented only by a short 

 fragment. 



Reproduction. — An example procured in the Gulf of St. Lawrence in July had well- 

 developed ova in the coelomic space. 



Tube. — The tube is lined by tough secretion, and has externally coarse or fine 

 grains of sand, minute shells and Foraminifera. 



The distribution of this species appears to be extensive, since it occurs on both 

 shores of the North Atlantic as well as the northern oceans. 



A variety with narrow wings to the bristles (Plate CXXVI, fig. 5) was dredged. 



