302 NICOMACHE MACULATA. 



which twenty -two are setigerous; two short pre-anal segments devoid of bristles. Anal 

 plate infimdibuliform, with short cirri on the margin. Anus in the middle of the funnel. 

 Upper capillary bristles in some stout, winged, with an attenuate apex ; others more 

 slender, shorter, devoid of Avings, but with opposite spikes. Inferiorly in three anterior 

 segments only a stout spine, in the rest uniserial hooks with three spines above the main 

 fang, and with a capillary fascicle on the throat below (Malmgren). 



1. Nicomache maculata, Arwidsson. Plate XCII, figs. 5—5 a— head and body; Plate 

 CIX, figs. 2—2 a— bristle and spine; Plate CX, fig. 13— hook. 



Specific Characters. — Anterior end bluntly-rounded dorsally, but with a projecting 

 process ventrally. Nuchal grooves on each side of the low median ridge, and they curve 

 outward anteriorly. In the concavity of each externally is a dark pigment-spot. Minute 

 eye-specks occur on the sides of the mouth anteriorly. Body about 2 in. long, more 

 or less rounded dorsally, but a ventral groove occurs posteriorly ; twenty-two bristled 

 segments, the first three of which have only powerful, fusiform, straight ? spines, and 

 segments 4 and 5 have a reduced series of hooks which are not quite typical in shape 

 though both may also have spines. Anterior region with numerous glandular areas, which 

 posteriorly chiefly affect the feet. Anal funnel forming a deep cup with fifteen to twenty-one 

 angular processes or cirri on the margin, the anus being in the centre; occasionally 

 a few smaller processes alternate with the others. One or two narrow rings behind 

 the last bristled segment. Segmental organs in segments 6 to 9. Speckled with 

 madder-brown anteriorly, or with white on a brownish ground. Transverse S-shaped 

 bar of white dorsally on snout. Fourth bristled segment sometimes, and occasionally the 

 whole anterior region, crimson. Often with a whitish belt between seventh and eighth 

 segments. Pale straw colour posteriorly, the anal funnel being dotted with white grains. 



Bristles of two kinds ; stronger capillary with minutely serrated wings, and more 

 slender anterior forms with long hair-like tips and opposite spines, the shaft being 

 smooth. Both continue to the posterior end. Spines of the three anterior segments 

 fusiform, with a powerful golden tip and strong muscles. Hooks with a moderately long, 

 curved shaft, striated internally, a marked shoulder posteriorly, neck constricted above 

 the shoulder, then curved backward and widening distahy, the great fang coming off at 

 somewhat less than a right angle, whilst the crown is high and presents in lateral view 

 five teeth. 



Frequents fissures of rocks in tubes of mud or muddy sand lined by secretion, or has 

 free tubes of mud or occasionally hardened with other materials. 



Synonyms. 



1853. Clymene horealis, Dalyell. Pow. Creat., vol. ii, p. 255, pi. xxxv, fig. 5. 

 1869. ' Nicomache lumhricalis, Mcintosh. Trans. Roy. Soc. Edinb., vol. xxv, p. 420. 



,, Clymene (Praxilla) lumhricalis, Grube. Mitt. St. Yaast, Abh. Scliles. Ges., 1868 — 69, p. 37. 



1874. Nicomache lumhricalis, Mcintosh. Ann. Nat. Hist., ser. 4, vol. xiv, p. 203. 



1875. „ „ idem. Invert, and Fishes St. Andrews, p. 127. 



1888. „ „ Cunningham and Ramage. Trans. Roy. Soc. Edinb., vol. xxxiii, p. 678, 



pi. xlvii, fig. 41. 

 1891. „ „ Horn ell. Trans. Biol. Soc. Liverp., vol. v, p. 251. 



