128 



I. Eiflcpis jnalayana Horst. PI. X\', figs. 5 — 7. 



Horst, Notcs from the Leyden Museum, Vol. XXXV, 1912/13, p. 164. 



Stat. 204. 4° 20' Lat. S., 122° 58' Long. E. Buton Stiait. Depth 75—94 M. i specimen. 

 Stat. 260. 5°36'.5 Lat. S., I32°55'.2 Long. E. West off Great Kei Island. Depth 90 M. i 

 specimen. 



The largest specimen, in :in indifterent state of preservation, measures 20 mm. in length 

 and has 37 segments ; the other one has a length of only 15 mm., with 34 somites. The head 

 is rounded without eyes; the paired antennae arise as two pointed, wedge-shaped processes, 

 lying closely to each other, from under the front of the head (PI. XV, fig. 5). The conical 

 tentacle, arising from the middle of the dorsum of the head, scarcely reaches with its tip till 

 half the leno-th of the antennae ; the tentacle as well as the antennae bear a dark spot on 

 the middle of the dorsal side. The. palps are conical, smooth, nearly twice as long as the an- 

 tennae and not extending much beyond the tentacular cirri. There are 12 pairs of elytra, 

 whitish, semi-translucent. with a notch in the external margin ; the anterior five ones are 

 rounded quadrangular, the others are elongated, extending over more than one segment. The 

 small -specimen possesses only 11 pairs of elytra-, probably it is not full-grown. The last ely- 

 tron extends over seven segments and therefore covers a great part of the posterior body- 

 region. The elytra are situated on segments 2, 4, 5, 7, 9.... 21 and 24, as mentioned by 

 Treadwell^); the posterior elytron therefore is not inserted on the 23''^ segment, like in the 

 Polynoïdae. because it is seperated from the foregoing by two branchiae-bearing segments. 

 The long elytrophores as well as the branchial processes are inserted quite next to the median 

 dorsal line. The dorsal appendages of the segments without elytra show more resemblance with 

 the branchial processes of a Sigalionid than with a cirrus, for they have a row of cilia at their ventral 

 .side, whereas also one or more groups of cilia are situated opposite on the dorsum of the notopodium 

 (PI. XV, fig. 6). However the appendage differs from a Sigalion-branchia therein that it con- 

 sists of a broad basal portion and a narrower, cirrus-like distal part, separated from each other 

 by a septum. In the segments, situated more posteriorly, this cirrus-like part becomes larger 

 and longer. The basal part contains a peritoneal cavity, in which an intestinal coecum enters 

 and also some eggs are visible ; its wall agreeing with Duncker's description-), shows a thin 

 layer of longitudinal muscles and an epidermis-layer, that is very thick at the ventral side of 

 the branchia. At the dorsal side a comb-like ridge is situated, consisting óf numerous cells with 

 coarsely-granular contents, presumably of a glandular nature. The distal part consists of large 

 polygonal cells. The third segment has a short, conical dorsal cirrus and is the first segment that 

 .shows in its notopodium the stout brown bristles, with the tip bent at a right angle towards the 

 shaft, characteristic for this genus ; beneath them is a fascicle of slender, capillary bristles, finely 

 serrated along the edge. The neuropodium contains a fascicle of stout yellow setae, winged along 

 both edges and with a fine capillary tip ; the superior of these setae is shorter and pectinated 

 below the tip (PI. XV, fig. 7). Their comb consists of about a dozen of large teeth, decrea- 



1) The Polychaetous Annelids of Porto Rico: Buil. of the U. St. Fish Commission, Vol. XX, Part. 2, 1902, p. iSl. 



2) Über die Homologie von Cirrus und Elytron bei den Aphroditiden: Zeitschr. f. Wissensch. Zoölogie B. LXXXI, 1906, 

 1>. 315, Textfigs. 31 and 32. ' 



84 



