POTTS— poltch.5:ta. 337 



and with surface quite smooth and devoid of ornamentation. Dorsal cirri of extraordinary 

 length, projecting considerably beyond border of elytra. 



Parapodium (fig. 29) with minute notopodium, containing number of short sUghtly 

 curved setae, with serrated edge and a sharp incurved apex. Ventral setce of two kinds, 

 viz., dorsally 1 to 3 setae of a slender kind (fig. 37), with spinose tip sharply bent at an 

 angle to shaft, spines disappear some distance from apex, but slight serrations continue 

 to end ; ventrally a series of stouter forms with strongly incurved tip, quite smooth on 

 concave border. One specimen from Fadifolu with number of forms intermediate 

 between these types (fig. 38), the spinose region becoming direct continuation of shaft 

 and diminishing in length and apex recurved. More ventral setae in same parapodium 

 also show reduction in number of spines, and lowest members sometimes quite smooth. 



Localities. S. Male. N. Male (" off a Gorgonian"). S. Nilandu. Padifolu. 



14. Folynoe crinoidicola, sp. n. (Plate 18. fig. 10; Plate 21. figs. 39-41.) 



Measurements. Length 13 mm., breadth 25 mm. ; no. of elytra 15 ; no. of seg- 

 ments 44i. 



Small form, commensal on crinoids, with highly arched dorsum, tapering rapidly 

 posteriorly. Head composed of two distinct halves, with two pairs of eyes. Anterior 

 of these situated at lateral angle are very large and raised on a distinct eminence, 

 approaching pedunculate condition. On posterior border of head second pair of eyes 

 of almost equal size. Lateral tentacles arise below median (which is missiag in these 

 examples) and are slender and short. Palps hardly as long as tentacles, stout and 

 conical. Elytra quite circular and barely cover parapodia ; arching of dorsum causes 

 them to appear smaller than they really are ; surface with delicate and characteristic 

 branching, smooth save for very minute tubercles. Dorsal cirri long, though falling far 

 behind those of P. longicirrus ia development. Notopodium is small but distinct, and 

 bears very numerous setae ; these are slightly curved throughout their length, broad and 

 rather sabre-like. On convex side generally a serration just under the acute tip and 2-4 

 even more prominent below. Small number of serrations in dorsal setae characteristic 

 of species. Neuropodium narrows to a sharp prominence. Dorsally a set of setae few 

 in number, slender and slightly curved. Apex incurved, with a tooth just below. 

 Some distance before tip shaft dilates, and semilunar cusp is found ; ventralmost setae 

 stouter, much more numerous, with prominent semilunar cusp and sharp incurved 

 apex ; area below apex smooth in this species. 



Localities. Prom the following places in the Maldives : — 5 off crinoids, Suvadiva Atoll ; 

 Kolumadulu Atoll ; " on a crinoid from west reef with a crustacean," Hulule, Male 

 Atoll; " oS' a black crinoid," Miladummadulu Atoll. 



The examples from two localities are of a dark red colour, but others described as 

 commensal on black criuoids are colourless in spirit, but were black when alive. 



15. Folynoe? minuta, sp.n. (Plate 19. fig. 12; Plate 20. fig. 31; Plate 21. figs. 42, 43.) 

 Measurements. Anterior fragment with 27 segments. Length 5 mm., breadth with 

 setae 1'5 mm. 



