POLYCH^TA. — BENHAM. 183 



Loc. — Forty miles west of Kingston, South Australia, 30 

 fathoms. 



Lepidonotus willeyi, sp. nov. 



(Plate xxxviii.j figs. 8-15.) 



? Lepidonotus carinulatus, Willey, Ceylon. Pearl Oyster 

 Fii^heries, part iv., Suppl. Rejo., xxx., — Polycha?ta, 

 1905, p. 248. Id., Potts, Trans. Linn. Soc, Zool., (2), 

 xiii., 1910, p. 331. 



A single imperfect specimen which measures 9mm. by 

 4mm. over the cha^tse, and only 2-5 across the body ventrally. 

 It is imperfect posteriorly, as it contains only 19 pau's of 

 parapoclia, and 10 elytrophores. The elytra are, with the 

 exception of 3 or 4 pairs, lacking. 



The specimen is a poorly preserved male. 



Under a lens the colourless elytra are covered in their 

 exposed regions by jiale brown roundish tubercles of re- 

 latively large size on the lateral area, and on the areola, 

 which is somewhat raised. A patch of jjale reddish broAvn 

 pigment occurs above the scar. 



The anterior concealed region is covered with muc^h smaller 

 hemispherical tubercles (PI. xxxviii., fig. 8). The large 

 tubercles, which appear to be round under a lens, are on 

 focussing seen to be polygonal at the base, and to be produced 

 into a variable number, and variably arranged short blunt 

 processes. 



Perhajis these correspond to Willey "s " echinulate " 

 tubercles, though the spines shown by him are sharper at 

 the point. 



Towards the external margin there occur a few rows of 

 " spinulate " tubercles, short columns of various sizes, ter- 

 minating in a variable number of sharp spines (PI. xxxviii., 

 figs. 9, 11). 



The elytra are fringed only on the external margin with 

 coarse, relatively long cylindrical processes. 



All these outgroAvths of the elytra are covered by abun- 

 dance of very fine particles, which masks their details to a 

 great extent. 



The prostomium is relatively long, narrowed posteriorly, 

 with the anterior eye laterally at the greatest width, which 

 is about midway along the side ; the posterior eye is about 

 midway between this and the hinder end of the prostomiimn 



