82 AET. II. A. IZTTKA : 



1902, from a depth of about 23 fathoms, west of the Misaki 

 ]\Iarine Laboratory, the elytra appeared to be translucent and 

 sliglitly yellowish in colour on splitting up tlie dorsal felt. 



Tlie worm, wlien disturbed, lias tlie liabit of curling up now 

 ventrally and then dorsally. When it is left quiet, the elytra are 

 alternately up -lifted and depressed. 



Laetniatonice producta Gr. 



1877. Laetmatoniee producta, Grube. Monatsber. d. Akad. z. Berhu, 



August. 1877, p. 512. 

 1885. Laetmonice producta, Mclutosb. " Challenger " Annel., p. 39, 



PI. lY, figs. 1—8. 

 1903. Laetmatoniee producta, Moore. Proc. Acad. Nat. Sc. Philad, 



Vol. LY, p. 420. 



In the absence of my own observations on the species, 

 the following extract is made from YIcIntosh's description. 



Body broadly fusiform, measuring about 100 mm. in length, 

 and about 50 mm. in breadth including setae and parapodia. 

 Number of segments 47. 



Prostomium somewhat triangular, with a slender elongated 

 median tentacle, to the tip of which is attached a pear-shaped 

 process by the narrowed end. Eyes small, on prominent pe- 

 duncles. Subtentacles separated at their base by a frontal 

 tubercle, smooth and glistening to the naked eye, but under 

 the microscope their whole surface is seen to be covered with 

 pointed cuticular papillae. Behind the ocular peduncles a multi- 

 lobate process occurs, extending laterally and then anteriorly along 

 the outer border of the peduncles. 



A typical spine-bearing segment (19th) bears dorsally a 

 series of boldly curved, dull golden setae, which are rather broad 



