73 



4:he telson, the rounded end just projecting beyond the eniarg-iua- 

 ,tion of' the segment ; the equally long outstanding outer branch 

 is apically acute and usually (though not in the specimen figured ) 

 rather sickle-shaped at the end- 



The colour (in formalin) long retains bright orange red trans- 

 verse bands, often interrupted in the middle, especially in the 

 pleon being limited to the extenlt of the transverse sutures. 



Length, 19-5 mm. Breadth, 9.5 mm. 



Locality : — Vasco de Gama Peak S. 75° E- 13^ miles, at a depth 

 •of 166 fathoms- 



The specific name refers to the prominence of the epistome. 



Gen- : Cymodoce, Leach. 



1814. CyiiiodoiC, Leach. Edinb. Encycl, vol- 7, p- 433. 



1815- Cyiiwdicc, Leach, Trans. Linn. Soc- London, vol. 11. p- 

 '368. 



1816. Cyjiioilicc. Leach, Encycl. lirit.. Art. Annulosa, p- 427. 



1818. Cymodocea, Leach, Dictionnaire des Sciences Xaturelles, 

 vol. 12, pp. 34 1 . 342. 



1868- Cymodocea, Bate & Westwood, Brit. Sessile-eyed Crust- 

 acea^ pt. 20, vol. 2, p. 425. 



1 89 1. Cyiiiodocnu Ives, P'oc. Acad. Philad., pp 188, 194. 



1893. Cymodoce. Stebbing, History of Crustacea, p- 362. 

 Leach, not content with using three different forms of the name 



-of this genus, in the Linnean Transactions misquotes the earliest 



form of it as C\'modycc. 



Cymodoce uncinata, n- sp. 



Plate 14. 



The head and peraeon have no very striking peculiarities, but 

 "rthe tip-tilted pleon is characteristic. In large specimens its sur- 

 face is rougher than that of the rest of the body, as if covered 

 with minute hexagonal crystals. Its first division extends 

 laterally beyond the side-plates of the seventh per?eon segment, 

 diaving the boundary line of its own first segment almost con- 

 cealed- Of the three followinp- centrally coalesced segments the 

 first is the broadest, and has the longest lateral margin, but docs 

 not overlap theothers ; thelasthastwo conspicuous submedian 

 teeth projecting over its hind margin- The telsonic segment 

 yrarriestwo large, somewhat carinate,submedi an bosses,beyond 

 Avhich it is depressed and narrows rapidly to the trifid apex, the 

 ■centre piece of which is faintly trilobed and carries on its upper 

 surface a reverted lobe or tooth, forming the hook to which the 

 ■specific name refers. 



