596 



Memoirs of the Indian Museum. 



[Vol. V, 



O 



front. From each of these bars a band passes to the posterior margin of the seg- 

 ment. In the middle and posterior regions the two lateral longitudinal bands dis- 

 appear, but the median band remains very distinct (text-fig. 7). The ventral surface 

 is colourless. The anal segment is short, cylindrical, and colourless, and the anus is 

 terminal. There are two short tapering anal cirri equal in length to the last three 

 segments. 



The head (fig. ioa) is narrow in front, with an abruptly widening posterior part 

 which bears the two pairs of dark eyes, each provided with a lens. The width of the 



posterior part exceeds the length of 

 the head. The tentacles and palps 

 are normal. The tentacular cirri 

 are rather short, and of the usual 

 relative proportions. All the parag- 



OV / V J naths are large, well-formed, and 



S^\ ^C dark in colour (figs, ioa, iob). 



(*Y\) r'J/^ Group I consists of 5-12 teeth ; 



Group II of curved bands each con- 

 taining 18-22 teeth ; Group III of 

 19 teeth ; Group IV of 16-22 teeth ; 

 Group V of 3 large teeth curved 

 backwards and arranged in a tri- 

 angle ; Group VI on each side of a 

 single large semi -circular smooth 

 tooth with the thin edge in front ; 

 Groups VII and VIII of a double 

 row of fairly large teeth with oval 

 bases, and approximately equal in 

 size. 



The jaws are of the usual shape, 

 and have 10-12 small teeth. 



The feet increase in size up to the 

 5th. 



The ist foot (fig. ioc, and text- 

 fig. 8a) has slender dorsal and ven- 

 tral cirri. The upper lobe (median ligule ?) is clavate, shorter than the dorsal cir- 

 rus. Only the ventral setigerous division is present. It consists of two slender 

 lobes, and the black spine lies in the upper part of the lower and longer one. 

 Almost surrounding these lobes and the setae is a large and prominent fillet, its 

 edges attached in front to the lower of the two lobes. The setae above the spine 

 consist of 2 anterior falcate heterogomphs and 3 posterior long-tipped homogomphs. 

 Below the spine is a single posterior long-tipped heterogomph and 10 inferior falcate 

 heterogomphs. 



The 2nd foot resembles the ist, but in the 3rd foot the dorsal division appears. 



a 



Text-fig. 8 — Parapodial diagrams of Perinereis marjorii, 



sp. nov. 



a. ist foot. b. 10th foot. c. 50th foot. 



• = Homogomph setae with spinous tips ; o = Heterogomph setae 

 with spinous tips; x = Heierogomph setae with falcate tips. 



