264 CEYLON FEARL OYSTER REPORT. 



The head is longer than broad ; the antennae do not stretch back to the eyes ; the 

 eye shows a clear lens (Plate III., fig. 63). There are four pairs of long tentacular 

 cirri of normal form. The dorsal phyllodes are rounded, not lanceolate, and strongly 

 pedunculate. The setae, 18 in a fascicle, are heterogomph, the articulation of the 

 appendix distinct; the appendix with serrulate edge (Plate III., figs. 64 and 65). 



The dominant specific character was ascertained by removing and opening the 

 retracted proboscis, the adoral portion of which is beset with longitudinal rows of 

 rounded normal papillae ; in two of the rows, probably median dorsal and median 

 ventral (since they are separated from one another by normal rows), there are three 

 large triangular papillae placed one behind the other, with normal papillae in front 

 and behind in the same rows. These modified papillae are denser than the rest and 

 are noticeable under low magnification with a simple lens (Plate III., fig. 66). 

 They are quite definite, two sets of three on opposite sides of the proboscis. 



The phyllodes aud setae are also characteristic, but the determining character is 

 given by the papillae of the proboscis. 



Phyllodoce foliosopapillata, Hornell Plate III., figs. 67 to 69. 



'Ceylon Pearl Oyster Report,' Part I., 1903, p. 16 and p. 28, " Yellowish green Phyllodocid." 



Station XVII., outside Periya Paar, 11 fathoms. 



The specimen, which is incomplete behind, has a length of 135 millims. (141 millims. 

 with extruded proboscis) ; about 207 segments ; ventral width between the parapodia 

 2 millims. ; over the parapodia 5 millims. The proboscis is firm and sexangulate ; 

 towards the base it is traversed by transverse rugae, and behind these, at the level of 

 the head on each side, there are six rows of transversely elongate, foliate papillae, 

 5 or 6 in the first row, 8 or !) in the second, 10 in the third, and again decreasing 

 below; at the free margin I counted 14 or 15 rounded papillae (Plate III., fig. 67). 

 The foliaceous dorsal cirri, which may be called phyllodes to distinguish them from 

 the elytra of the Aphroditidae, are borne upon broad peduncles to which they are 

 strongly adherent. In this specimen the phyllophores are filled with ova (Plate III., 

 fig. 68). 



There are as many as 25 compound setae in a parapodium. The long flexible 

 spiniform appendices are serrulate along one border, but in some of them the serru- 

 lations are obscure or even obsolete. The setae differ from those of other species in 

 the presence of a long stout spur at the head of the shaft, which sometimes projects 

 considerably beyond the neighbouring denticulations, even more so than in the 

 example figured (Plate III., fig. 69). 



Closely apposed to the sides of the prostomium is a pair of lateral nuchal organs 

 (Plate III., fig. 67). The prostomium is broader than long, deeply emarginate behind, 

 and in the notch there is an occipital papilla, such as occurs also in Phyllodoce 

 madeirensis and other species. 



