280 Mil. CYRIL CKOSSLAXD ON THE [Feb. 16, 



(PL XYIII. fig. 6 and text-fig. 41), the presence of this number 

 being a peculiarity shared only by P. claparedi. In all the other 

 species the notopodia of C ai-e, as in P. gardineri^ clavate papillae 

 containing a single seta. 



Text-fiff. 41. 



Side view of a notopodiuin of Fh^lloch(etoplerus acicidigerus. 

 s= setae; ??i= muscle. 



The neuropodia ai'e of fair size, though much smaller than 

 those of the gill-bearing region. Their uncini are as shown in 

 PI. XVIII. fig. 7. 



Although the tube is unfortunately missing, the facts of the 

 large size of the worm and that but one specimen was collected 

 make it almost certain that it is straight and occurs singly. 



Locality. Mamaduvari, South Mahlos Atoll, the Maldive Archi- 

 pelago. From the reef. 



Phylloch.etgpterus gardineri, sp. n. (Plate XIX. figs. 3-7.) 



This species is too closely related to P. elioti (P. Z. S, 1903, 

 vol. i. p. 172) for a concise definition to be possible. It is readily 

 separable, however, by its much larger size. 



The collection contains a single complete and beautifully 

 preserved specimen, but the tvibe is missing. 



The species is of rather larger size than the majority of this 

 genus, measuring 2*5 mm. across the anterior body-region. 

 The head is of the same breadth, or nearly so, as the succeeding 

 segments, the peristomial collar being but slightly developed. 

 The prostomium is large and bears two very distinct eye-spots 

 (PL XIX. fig. 3). The region A bears 15 stumpy dorsally- 

 directed parapodia. Their setse are like those of Ghcetopterus, 

 but their ends, as in the other species of Phyllochcetopterus 

 examined by me, are thicker and more strongly striated. The 

 foui-th notopodium contains three strong light brown setae, the 

 flattened shape of which (PL XIX. fig. 4 a) recalls that of the 

 corresponding setee in Chcetoptertis. These are straight, but some 

 of the ordinary slender setje of this parapodium are bent (PL XIX. 

 fig. 4 h). The majority of the setse of this region are of the usual 

 foiin, but the last segment carries some which are bent at the 

 head as shown in fig. 4 c, PL XIX. 



The fii'st three segments of the i-egion B are muscular even 



