ii6 



internal margin of the elytra ; the bristles have a brownish yellow hue. On the anterior segments 

 the elytra are somewhat diverging and do not cover the dorsum, that is transversely folded. 

 The (Irst pair of elytra, that overhang the cephalic lobe, are oval, areolate, without papillae, 

 with a smooth, light-coloured border and an eccentrical scar of attachment ; the elytra, situated 

 more posteriorly, are more elongated, heart-shaped. In Leanira magellanica Mc Int. the scales 

 are studded with papillae, whereas in L. areolata Mc Int. they have a ciliated margin in the 

 reo-ion behind the anterior third of the body. From the median part of the prostomium (PI. XXIV, 

 fier. •>) the short, basal joint of the tentacle arises, that is somewhat enlarged in its inferior part 

 and furnished laterally with two rather large wing-like ctenidia. The tentacle, tapering distally, 

 is nearly as long as the longest tentacular cirrus ; on each side of its base a conspicuous black 

 eye is visible, whereas more anteriorly another smaller one is situated, that lies hidden under 

 the tentacular-ctenidium. In L. magellanica as well as in L. rtir^ci/ató the eyes appear to be totally 

 absent, whereas in L. japonica Mc Int. there is a pale band behind each eye. The palps bent 

 downward and backward reach the iS'*^ segment. 



The buccal parapodium (PI. XXIV, fig. i) shows an obvious difference in length between 

 the ventral and the dorsal tentacular cirrus, the last named having about ten times the length of 

 the first one ; at the base of each of them a fascicle of capillary bristles emerges. In the dorsal 

 fascicle, that is furnished with an acicula, the setae are smooth, faintly denticulated or whorled 

 and extend nearly to the extremity of the longest cirrus ; those of the ventral fascicle are shor- 

 ter, smooth. With the internal side of the base of this segment the short lateral antenna is 

 coalesced and four digitiform stylodes arise above its basal joint. At the ventral side and exter- 

 nally, near the base of the ventral tentacular cirrus, two buccal-ctenidia (Pruvot et Racovitza) 

 are situated, the internal one (cuilleron céphalique Clap.) somewhat tongue-shaped, the other 

 one (lamella praebuccalis Ehl.) ear-like twisted. The second segment has a short elytrophore 

 and there are no ctenidia visible on its dorsum. The notopodium and neuropodium are faintly 

 separated from each other ; the notopodium is obtuse, rounded, with about a dozen of digiti- 

 form stylodes on its circumference. The neuropodium is somewhat more prominent and is furnished 

 at its superior and inferior extremity with four stylodes, whereas in the middle of its external 

 border three of them are visible ; along the ventral border a row of cylindrical glands occurs. 

 Its ventral cirrus is rather long and somewhat extends beyond the distal extremity of the foot. 

 The third segment shows no tracé of a dorsal appendix ; this is a remarquable fact, because in 

 L. japonica this segment as well by INIc Intosh as by Izuka is figured with dorsal cirri and 

 in L. magellanica and in L. areolata also long dorsal cirri are present. In the notopodium 

 the number of stylodes is much decreased and reduced to four (two dorsal and two ventral 

 ones) ; the neuropodium much resembles that of the second segment. The first branchial appendix 

 occurs on the sixth segment. 



A foot of the middle of the body (PI. XXIV, fig. 2) shows both branches more pointed 

 and furnished with several stylodes, among these a long one at the tip of the notopodium ; 

 there is a long branchial appendix at the elytrophore and the dorsum of the notopodium possesses 

 three ctenidia, situated close to each other. The ventral cirrus extends to about half the length 

 of the neuropodium and suddenly becomes very slender at a short distance of its distal extremity. 



