84 AKT. II. — A. IZUKA : 



Vciitral cirri short, subulate, their tip scarcely reaching the base 

 of inferior setae. Ventral surface of body as well as sides of 

 parapodia with brownish cuticular warts. 



Habitat: — Sagami Bay, 15o fathoms. ("Albatross"). 



Laetniatonlce producta Gr. var. beiithaliana Mcintosh. 



PI. IX, %s. 7—10. 



1885. Laetmatonice producta var. beutlialiana, Mclutosh. " Challeuger " 



Aunel., p. 45, PI. VIII, figs. 1, 5 ; PL IV, fig. 12. 

 1903. Laetmatonice producta var. beutlialiana, Moore. Pioc. Acad. 

 Nat. Sc. Philad., Vol. LV, p. 420. 



Body, consisting of 40 segments, measures 48 mm. in length 

 and 15 mm. in breadth. 



Prostomium somewhat triangulai- ; median tentacle, slender 

 and elongated, with peculiar enlargement on tip. Lateral regions 

 of prostomium very prominent. Ocular peduncles globular ; eyes 

 indistinct. Elytra in 10 pairs (McIntosh says the number of elytra 

 varies from 15 to 18 pairs), borne on same segments as in typical 

 Laetmatonice producta. They are more delicate than in the 

 typical species, exhibiting under the microscope a finely granular 

 condition with radiating lines. No dorsal felt exists. 



Dorsal spines considerably larger than in the typical species, 

 and Avhile the shafts are large and flattened, the terminal portions 

 are relatively small, presenting a distinct curve in certahi views. 

 Number of fangs in the terminal portion varies, but is mostly o or 

 4 (fig. 7). Slender l^ristles from the inner dorsal tuft overlapping 

 the elytra are represented in PI. IX., figs. 8 — 9 ; longitudinal striae 

 are very distinctly marked in these bristles, and numerous 

 chitinous prickles surround the shaft. 



