POLYCH/F.TA. 283 



(Ann. Marseilles/ 1875, p. 13). Its interest lies in its occurrence here, not in its 

 supposed differences from its two allied forms, since there are no differences which are 

 figurable. The character of the group depends upon the presence of two kinds of 

 compound setae, spinigerous and falcigerous, in the parapodia. The special feature 

 of the Ceylon representative depends upon the distribution of the branchiae. 

 Length 25 millims., width 275 millims. ; 104 setigerous segments. 



The frontal border of the prostomium is emarginate and the division is continued 

 as a shallow median groove along the dorsal surface of the head. Branchiae com- 

 mence as a small filiform process on the 11th foot, uniramous from 11th to 19th foot, 

 biramous from 20th to 25th, triramous from 26th to 68th, decreasing and ceasing at 

 the 85th foot. Dorsal cirri fusiform, decreasing in size posteriorly. Anal cirri 

 subulate, smooth, with ring of brown pigment at base ; ventral anal styles minute 

 filiform. Compound setae, falcigerous and spinigerous, the spiniform appendices 

 longer and shorter ; both kinds of setae occur together from the first parapodium, but 

 in the specimen now being described only the spinigerous form was observed in the 

 posterior segments. 



In the anterior parapodia a dorsal fascicle of limbate capillary setae, a central 

 group of three aciculae and the ventral fascicle of compound dimorphic setae ; in the 

 posterior parapodia the dorsal fascicle contains limbate and scalprate setae ; there 

 is a central group of two aciculae, a ventral fascicle of compound setae and a ventral 

 bidentate acicular seta. A second specimen, darker coloured, anal cirri black, showed 

 both kinds of setae in the posterior feet ; branchiae from 10th to 55th foot ; maximum 

 number of three filaments observed on one foot only ; length 9 millims. ; width 

 nearly 2 millims ; segments about 73. 



Paramarphysa orientalis, n. sp. Plate IV., fig. 105. 



Locality : South-east Cheval Paar, Gulf of Manaar. Several specimens. 



Length 21 millims., width 1 millim. ; 91 setigerous segments. 



Prostomium almost entire, a shallow groove only dividing the front ; antennae 

 short, about the length of the prostomium, tentaculum impar somewhat longer. 

 There is an eye-spot on each side of the head between the bases of the submedian 

 and lateral antennae. Bidentate ventral acicular setae begin on the 26th foot ; a 

 segment or two behind this the main aciculae become dark coloured ; there may be 

 two acicular setae in the posterior parapodia. The superior fascicle of capillary setae 

 shows slight difference in anterior and posterior regions, the limbate tract being 

 shorter and more convex behind ; comb-setae with long marginal laciniae occur as far 

 forwards as the 9th foot. The compound bidentate falcigerous setae are normal, not 

 markedly different in front and behind, distinguished by the slight inflated appearance 

 of the end of the shaft (Plate IV., fig. 105). 



Only one other species of Paramarphysa has been described to my knowledge, 

 namely, P. longula, Ehlees ('Florida Ann.,' 1887, p. 99). 



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