32 IVAR ARWIDSSON, SYSTEMATIC NOTES ON SOME MALDANIDS. 



Euclymene modesta (Quatrefages). 



(Pl. 2., figs. 30—35.) 

 1865. Clymene modesta Quatrefages (7, p. 239). 



This species, desGribed shortly by Quatrefages from specimens from St. Sebastian 

 on the north coast of Spain, is very probably present in this collection. At any råte the 

 number of setigerous segments, as also on the whole the anal cirri, agree with Quatre- 

 fages' description, whence T venture here to re vi ve this species, hitherto scarcely worked 

 ont at all. Grube (8, p. 54) gives 17 setigerous segments for Cl. modesta, but here, as 

 in other cases, he has only included the (setigerous) segments forming part of Quatre- 

 fages' »region moyenne». 



Specific diagnosis. The anterior point of the head of medium size. The 

 lateral borders with distinct lateral notches situated far back; the borders in front of 

 these wide and posteriorly strongly decreasing, forming there a very distinct notch in 

 the middle line. There are ocelli on the lower side of the cephalic point as also strongly 

 accumulated on the sides beneath the anterior part of the cephalic borders. Proboscis 

 papillae posteriorly — 6—7 in each row, anteriorly the number decreases to 2. The 7 th 

 setigerous segment is short and the 8 th long with parapodia at its posterior part. 

 Normally there are 20 setigerous and (2—) 3 achaetous posterior segments. The anal 

 cirri, apart from the distinctly longer ventral cirrus, are of equal length, finger- 

 shaped, and rather short. Nephridia in the 7 th — 10 th setigerous segments. Distinct 

 anterior band of glands on the lsi>_7th setigerous segments, weakest on the 2 nd , especi- 

 ally strong on the 3 rd — 7 th , and extending över almost the whole segment on the 3 rd 

 — 4 th . The 8 th setigerous segment has a distinct band of glands in front of the para- 

 podia; the anterior edge of the band is of ten uneven; a lower and even an upper notch 

 is especially frequent. Distinct longitudinal band of glands: on the back from the 10 th 

 or in younger specimens the 9 th setigerous segment inclusive and along the sides of 

 the ventral nerve cord from the 9 th setigerous segment inclusive — in both cases up 

 to about the 14 th — 15 th setigerous segments inclusive. On the sides beliind the capil- 

 lary setae there runs in addition a longitudinal glandular band on the 10 th , and an- 

 other, although of ten weak, on the ll th setigerous segment. On smaller specimens the 

 same band appears already on the 9 th setigerous segment. The uncini in older speci- 

 mens are simple on the l st — 3 rd setigerous segments with a single-toothed, strongly 

 curved outer part; the inner part rather coarse. In younger specimens these setae 

 are more like ordinary uncini, with 2—4 teeth and 1—2 in each parapodium. The 

 developed uncini have 7—8 teeth. The anterior capillary setae are very numerous and 

 fine on the 8 th — 10 th setigerous segment. The base of the points of the posterior capil- 

 lary setae is somewhat expanded and light from the 12 th — 13 th setigerous segment. 



Co lo ur: not exactly known. 



Extern al structure. The lateral borders of the head are rather wide in 

 front of the lateral notches, which are situated far back. The point of the head is 

 more or less rounded and rather wide, but a somewhat more pointed shape than 



