290 
THE VOYAGE OF H.M.S. CHALLENGER. 
The specimen is fragmentary, and the anterior region has a diameter of 4’ 5 mm. 
The head (PI. XXXIX. fig. 9) has been partially dried, but seems to have long 
tapering annulated tentacles. The tentacular cirri are long and tapering, and extend 
nearly a third of their length beyond the anterior margin of the buccal segment. 
The dental apparatus is for the most part pale buff, the tips of the maxillae, the 
edges of the great dental plates, and the spathulate posterior processes alone being dull 
madder-brown. The maxillae (Fig. 50) are slightly curved, and the tips cross each other 
in action, the right point going under the left. The motion of these organs appears to 
be more a folding together of the halves, so as to cause the grooves at the base to inter- 
lock, than mere scissor-motion. When the dental apparatus is protruded, the lateral 
Fig. 50. — Maxilte and dental plates of Eunice mindanavensis, n. sp. The former and the right lateral plate have 
been separated ; x 15 diameters. 
Fig. 51. — Mandibles of the same species, from the dorsal aspect ; x 15 diameters. 
plates (paired) are drawn upward and backward to guard the space that exists there, 
while the maxillse and great dental plates are thrust outward. The left great dental 
plate has seven teeth, the right the same number. The left lateral paired plate 
exhibits four large teeth (next the accessory plate) and a series of five or more minute 
teeth adjoining. The left lateral unpaired plate shows nine or ten teeth. The right 
lateral also has nine or ten teeth. There are two accessory plates on each side, the 
first having its upper third developed into a conical tooth ; and the second presenting a 
small flat dental edge. The mandibles (Fig. 51) present an irregular anterior edge, and 
