49 



The dental apparatus comes near that of Schmarda's species, 

 the long pointed ends of the posterior appendages being diag- 

 nostic (Plate III., fig. 1 8), and resembling those of Kinberg's 

 Liimhriconcrcis Jacksoiii.^' The maxillae are strongly curved, 

 and articulate posteriorly with a dilated region, which is again 

 constricted, and ends in two slender tapering points (one on 

 each side). In lateral view, the maxillae show a considerable 

 curve. The great dental plates have four distinct teeth on each 

 side, and the movement of these plates is such that the dental 

 edge can be placed either horizontally or nearly vertically with 

 the teeth pointing dorsally. A considerable portion of the edge 

 of each posteriorly is smooth. In front of these is a small 

 plate, which also appears on the ventral surface with one or two 

 teeth, then a larger plate similarly placed in front, with a single 

 tooth at its posterior (dorsal) edge ; whilst externally, is a flat 

 horny plate, and after an interval, a thin curved horny process, 

 which passes backward to a point opposite the middle of the 

 maxilla.'. 



The whole apparatus is of a blackish-brown colour. 



The mandibles are elongate, wedge-shaped as in Luiiibri- 

 conereis Pettigreivi, only shorter. 



The feet are normal in outline, a conical lobe, or process, 

 slanting backward from the setigerous process. This is 

 probably what Schmarda calls " hranchia (cirrus dorsalis) basi 

 angitstior," a statement which has given rise to misapprehensions. 



The bristles (Plate II., fig. i^a) anteriorly are winged with 

 the usual curve at the base of the tip, and with finely serrated 

 edges. Towards the 50th foot, winged hooks take the place of 

 the inferior groups of winged bristles, and, by-and-by, winged 

 hooks alone occupy the feet to the tip of the tail (Plate II., 

 figs. 19 and 20). The wings of these hooks are somewhat broad, 

 and the tip ends in a main fang, and several smaller points 

 superiorly. In most of the larger forms these are abraded, 

 being best seen in young specimens. The edges of the wings 

 are serrated. The spines are yellowish. 



The constricted condition of the posterior lamella of the foot 

 (Schmarda's branchia) may have been connected with preserva- 

 tion, as this was not a feature observed in the present specimens. 



Schmarda obtained it both at the Cape and on the coast of 

 Chili, and Ehlers has recently described it both from Magellan 

 and Chili. The distribution of this species is, therefore, very 

 wide. The Luuibriconereis Pettigreivi of the "Challenger " would 

 seem to be the same form. 



* Freg. Eugen. Kesa, cSic, Taf. xviii., tiLi 34. 



D 



