34 THE VOYAGE OF H.M.S. CHALLENGER. 



The discovery of this interesting species — originally described from Japan — at a 

 considerable depth off the Fiji Islands, is an important addition to our knowledge of its 

 distribution. It was previously recorded l)y Haswell from the Australian coast, where, 

 however, it appears to be of rare occurrence. The Japanese species described by Miers 

 as Lyreidus elongatus,^ and doubtfully referred by this writer to Lyreidus tridentatus, 

 appears to be distinct. More recently Professor S. I. Smith has described a third species, 

 Lyreidus bairdi, from the e ast coast of the United States. 



Genus Zanclifer, n. gen. 



Carapace ovate, convex from side to side and from before backwards, its surface partly 

 uneven. Fronto-orbital border very narrow, considerably less than half the width of the 

 carapace, the frontal region trilobate, produced anteriorly. Eyes rudimentary, placed in 

 ill-defined orbits ; the peduncles short, and the corneae of small size though pigmented. 

 Antennar peduncle massive, the first segment fused with the carapace, the second with a 

 very prominent external prolongation ; the flagellum short. Antennules of small size, 

 completely concealed by the antennar peduncles, which meet together in the middle line. 

 External maxillipedes moderately broad, with the ischium twice the length of the merus. 

 Sternal thoracic shield narrow, becoming linear between, the legs of the second pair, but 

 slightly dilating again between the second and third pairs. Chelipedes of considerable 

 length, the propodus swollen laterally, the fingers long. Ambulatory limbs with 

 uncinate dactyli, the fourth pair of small size but not filiform. Male generative append- 

 ages similar to but shorter than those of Raninoides. 



The form and arrangement of the eyes, antennules and antennae, distinguish 

 Zanclifer from all other genera of Kaninidea. In the general shape of the carapace it 

 comes nearest to Lyreidus, but this resemblance is probably accidental, for other generic 

 features (especially the formation of the external maxillipedes) are widely different in 

 the two genera. The rudimentary nature of the eyes and the structure of the limbs 

 point to this genus being fossorial in habit. 



Zanclifer caribensis (De FreminviUe) (PL III. fig. 2). 



Erijoncaribends, De FreminviUe, Ann. d. Sci. Nat., ser. 1, t. xxv. p. 273, pi. viii.B. figs. 1-2, 1832. 

 Enjoii trilobatus, De FreminviUe, Icones Crustaceonmi quae ad littora America Meridionalis 

 reperiuntur k C. P. de FreminviUe (unpublished, no date). 



Characters.- — The surface of this species is everywhere finely granulated. The 

 carapace is ovate, granular, its length one and a half times as great as the breadth, 

 the anterior half with very numerous eroded depressions arranged symmetrically 

 on both sides ; immediately behind the frontal region the carapace rises somewhat 



' Pjoc. Zool. Soc Loncl, p. 46, 1879. 



