I 20 



dorsum a short tentacle arises, nearly as long as the head ; it consists of a short, cylindrical 

 basai joint, provided on each side witli a uing-like ctenidium, and of a slender tapering ter- 

 minal joint. The lateral antennae, fused vvith the buccal segment, are not quite as long as the 

 basal joint of the dorsal tentacular cirrus. Both tentacular cirri differ much in length ; the dorsal 

 one is not quite as long as half the length of the palps and the ventral one is only some- 

 what longer than the basal joint of the first. The palps are very long ; bent downward and 

 backward they reach the 12"^ segment. The first branchial appendix occurs on the elytro- 

 phore of the 5"' segment. The third segment (PI. XXVI, fig. 3) has no dorsal cirrus ; its dis- 

 coidal notopodium bears only a single, short, digitiform stylode, situated above the bristle- 

 fascicle. lts neuropodium is much higher, rounded triangular, and provided in the middle of 

 its distal extremity with two short, oval stylodes ; ventrally there occur two long, cylindrical 

 stylodes, emer<ying from a common base, while dorsally five other stylodes are connected with 

 a short appendix. The ventral cirrus of the third segment is furnished with a terminal joint 

 and reaches nearly the distal extremity of the parapodium. In the segments (PI. XXVI, fig. 4) 

 situated more posteriorly (f. i. the 9*) the notopodial stylode is som ewhat increased in length; in 

 the neuropodium the two central stylodes have disappeared, whereas of the two ventral ones 

 only a single one remained and the dorsal stylodes became shorter and thicker. In the neuro- 

 podial briste-fascicle there are no simple spirally-whorled bristles visible. 



This species can easily be distinguished from Lean. viilturis by the shape of the scales, 

 the situation of the first branchial appendix and by the structure of the parapodia ; it differs 

 from Lean. Qtiatrefagesi and Lcan. hysiricis by the presence of antennal ctenidia. 



6. Leanira coeca n. sp. PI. XX\T, figs. 5 — 7. 



Stat. 5. 7°46'Lat. S., 1 14° 30.5 Long. E. Depth 330 M. i incomplete specimen. 



Stat. 17S. 2°40' Lat. S., 128° 37^5 Long. E. Depth 835 M. i incomplete specimen. 



Stat. 211. 5°4o'.7 Lat. S., 120° 45'. 5 Long. E. Depth 1158 M. i incomplete specimen. 



Stat. 271. 5°46'.7 Lat. S., i34°o' Long E. Arafura Sea. Depth 1788 M. 15 specimens. 



Stat. 314. 7°36'Lat. S., 1 17° 30'. 8 Long. E., oft" Paternoster Islands. Depth 694 M. 3 specimens. 



Of this species several incomplete specimens were collected ; those of Station 271 are 

 in an indifferent state of preservation. It is a deep-water species like Lcan. /n^f/'r/r/.f Ehl.^) and 

 much resembling it ; however I do not believe, that they are identical. The prostomium (PI. XXVI, 

 fig. 5) has the shape of a reversed trapezium, nearly as long as broad ; its anterior margin 

 is rounded. From its median dorsal line a short tentacle arises, not much longer than the head, 

 consisting of a rather long 'basal joint and two shorter distal ones, separated by a constriction. 

 There are neither antennal ctenidia nor eyes, like in L. /ivstricis. The lateral antennae (/^i^/z/^r- 

 cirrus Ehl.) are coalesced with the internal side of the basal part of the first segment, that 

 has a triangular appearance ; they consist of a rather slender basal joint and two dilated distal 

 ones. Both tentacular cirri differ much in length ; the ventral one measures about half the 

 length of the dorsal cirrus. The palps are very long ; bent backward they reach the 1 2 "^ seg- 

 ment. At their base they are surrounded by large buccal ctenidia. The elytra are roundish, 



i) I.oc. cit. 



76 



