410 PROCEEDINGS OF THE ACADEMY OF [Juiie, 



frontal processes of head, which are shghtly dorsad of the level of the 

 median ceratophore; style similar in form to median bnt with a rela- 

 tively longer terminal filament which reaches only to the median ball. 

 Palpi with very broad, widely separated bases, fully half of which pro- 

 ject beyond the sides of the head ; otherwise they are similar in form to 

 the palpi of L. cJiitoniformis; basal -f brown, the rest white. 



Peristomial parapodia not cpiite reaching to tip of median tentacular 

 ceratophore; the dorsal tentacular cirrus, which alone remains in the 

 only specimen, similar in form to median tentacle, but with a longer 

 filament, and the entire style slightly shorter. The protruded probos- 

 cis has a length of 6 mm, and a diameter of 3.7 mm. It bears four 

 light brown fang-like jaws of the usual form, and thirteen papillae above 

 and thirteen below, all but the small lateral ones, which are simple, 

 being strongly curved, compressed and bilobate. There is also a trans- 

 versely elongated low subterminal ventral papilla*. 



Total number of somites, including peristomium, 26; setigerous 

 somites 25; elytra 12 pairs. Nephridial pai^illae may be detected as 

 far forward as IV, but the first 3 are very small, the others exactly as 

 described for chitoniformis. Except that the difference in size between 

 the anterior and posterior ones of the dorsal series is less evident, the 

 dorsal tubercles are exactly as in L. chitonijormis. No important 

 differences are to be noted in the form and structure of the 

 elytrophores. 



The branchiae have the same arrangement as in L. chitoniformis and, 

 although fewer and simpler, are larger and more conspicuous than in 

 that species. All are rather long and slender and entirely unbranched, 

 and are directed more or less latei'ad and dorsad. None occurs on the 

 dorsum of the parapodium. On the elytra-bearing somites one arises 

 from each the posterior and anterior Ijorder of the elytrophore, the 

 former being somewhat the larger and more laterad. On the anterior 

 face of the parapodium is a series of about 3, arranged along a line from 

 the one mentioned above to the base of the ventral cirrus, to which, 

 however, it does not reach ; one or two smaller detached processes may 

 lie ventrad of the middle of this series. On the posterior face usually 

 3 in a group are found below the outer end of the elytrophore, at a 

 lower level than the anterior series. On the cirrhiphorous somites the 

 arrangement differs slightly. A short anterior one arises from the 

 border of the ridge passing to the cirrus ; an oblique series of 4 occurs 

 on the anterior face of the parapodium. Posteriorly there are two mar- 

 ginal, a cirral which arises from the base of the cirrus in actual contact 

 with its posterior gland, and 2 or 3 others lower down on the posterior 



