“4. Malmgrenia. CRASSICIRRIS.
(Pl. XLII., figs. 3-4, and P1. XLIV., figs. 5 and 6.)

Elytra reniformia brunnea albolineata striis candidis duabus longitudinalibus ; setae ventrales apice bidentato denticulo accessorio intermedio ; cirri ventrales tumidi subulati.

The two white stripes upon a dark madder-brown background on each elytron give this species a characteristic appearance totally unlike anything else in the collection. Seen from below, the whitish fleshy ventral cirri convey an equally distinctive impression. When the elytra are removed, the intensely white prostomium and the whitish elytrophores stand out prominently from the general dark madder-brown ground colour.

The largest specimen was unfortunately mutilated behind, only thirty-one segments being preserved with the fragment, which measured 17 mm. in length and 6^.5 mm. over the setae. A com­plete specimen, 14 mm. long by 4^.5 mm. wide (over the setae), had forty segments.

The dorsal setae are much shorter and stouter than the ventral setae, in this respect bearing a resemblance to Malmgren's genus Laenilla.¹

The dorsal setae are nearly smooth, but faint serrations can be observed along the convex border with a high magnification. The greatest peculiarity in the parapodial armature is presented by the ventral setae, which have gaping bifid tips with a small accessory tooth between the larger prongs. The number of paired alternating spinous rows on the ventral setae is about twelve, the eighth row occurring at the point of maximum dilatation.

Several specimens were obtained off Cape Adare in 20 to 26 fathoms at a temperature of 29° Fahr. In the state of preservation in which they arrived they proved to be excessively fragile, the cirri and elytra breaking off with the greatest ease and even the intersegmental junctions giving way.

¹Grube, E.: ‘Bemerkungen über die Familie der Aphroditeen III., Polyonina,’ see p.59 Jahresber. Schles. Ges., 1875 (Brelau, 1876).

² Darbopux, J.G.: ‘Recherches sur les Aphroditiens,’ Bull. Sci. France et Belgique, XXXIII, 1900, see p.106.”

(Willey, 1902)