46 AKT. II. — A. IZUKA : 



1891. Polyiioë (Haiinotlioë) imbric.ita, Hoinell. Polychaet, Liverpool 



Dist., p. 231, pi. xiii, f. 2. 

 1890. Harmothoë irnbiicatM, MicLœlseu. Polycli. Fauna, p. 11. 



„ Polj-noë (Harmothoë) imbricata, Houle, Camp. cl. ' Caud.,' 443. 



1897. Harmothoë imbricata, H. P. Johnson. Pacific Aunel., Califor. 

 Acacl. Se, p. 181. pi. vii, f. 37. 



1898. Harmothoë imbricata, Michselsen. Grönl. Annel., p. 121, 

 1900. „ „ Mcintosh. Brit. Annel., pi. ii, p. 314. 

 1903. „ „ Moore. Proc. Acad. Nat. Sc. Philad, vol. 



LV, p. 402. 



Body elongate -ovate, posteriorly more distinctly narrowed 

 than anteriorly. It measures 24 mm. in length and the breadth 

 4 mm. without, and 9 mm. with, parapodia and bristles. Number 

 of body segments generally 39, exceptionally 1 or 2 less. 



Prostomium (PL V, fig. 1) exhibits as usual two pairs of eyes ; 

 those of the anterior pair are situated laterally and under the 

 anterior peaks, so that they are invisible from the dorsal side, 

 while those of the posterior pair are situated near the postero- 

 lateral margin. Median tentacle is long, while the lateral ones 

 are short and scarcely reach half the length of the former. Each 

 tentacle, both median and lateral, consists of a basal region and 

 of a terminal style, which exhibits a distinct swelling, the sub- 

 terminal bulb, before terminating in the filiform end. The style 

 is provided with sparsely distributed, clavate papillae (PI. Y, fig. 

 2), except in the filiform end which is smooth. Subtentacles arc 

 elongate and tapering, and are beset with rows of somewhat 

 truncate clavate papillae. Tentacular as well as dorsal cirri agree 

 with the median tentacle in form, and are in possession of a 

 considerable number of clavate papillae. Dorsal tentacular cirri 

 are about equal in length to the median tentacle, while the 



