1264 THE VOYAGE OF H.M.S. CHALLENGES. 



margin more numerous, and at two points of the outer margin ; the fifth joint subequal 

 in length to the three preceding together, at a distance from the base of about a fourth 

 of its total length carrying two palmar spines delicately serrate for more than the distal 

 half of their inner margin ; below these the joint is abruptly narrowed, and fringed with 

 slender spines ; the outer margin has groups of slender spines at five or six points ; the 

 fino-er is strong, curved, matching the palm, with a short dorsal cilium not far from the 

 hinge. 



Fourth Perseopods like the third but longer. 



Fifth Peneopods like the two preceding pairs, but with all the joints decidedly longer, 

 the third joint much longer than broad, and considerably longer than the fourth 

 joint. 



The Pleon appeared to consist of a dorsal plate and a ventral plate, each more or less 

 semi-oval ; between these appeared to lie the rounded distal margins of the anal opening, 

 and projecting at either side was a one-jointed uropod. 



Length, in the position figured, from the rostrum to the pleon, nearly nine-twentieths 

 of an inch. 



Locality.— Station 233a, off K6b6, Japan, May 19, 1875 ; lat. 34° 38' N., long. 135° 1' 

 E. ; depth, 50 fathoms; bottom, sand. Four specimens male; two specimens female. 



Caprella danilevshii, Czerniavski (PI. CXLV.). 



1868. Caprella Danilevskii, Czerniavski, Materialia ad zoograph. pont. compar., p. 92, tab. vi. 



figs. 21-34. 



1880. „ inermis, Haswell, Proc. Linn. Soc. N.S.W., vol. iv. p. 348, pi. xxiii. fig. 3. 



1882. „ „ Haswell, Catal. Australian Crustacea, p. 314. 



1882. „ „ Mayer, Die Caprelliden, p. 71, woodcuts 26-29. 



1882. „ Danilevskii, Mayer, Die Caprelliden, p. 54. 



1885. „ inermis, Haswell, Proc. Linn. Soc. N.S.W., vol. ix. pt. iv. p. 8 (separate copy). 



Czerniavski gives the following description : — 



" Mas. — Corpus gracile, aculeis tuberculisve non ornatum, segmento 2-do valde longo, 

 triplum vel quadruplum longiore quam lato, 3-io et 4-to vix brevioribus, 5-to oblongo. 

 Caput segmento 1-mo fere duplo brevius. Antennse superiores | corporis loreviores, flagello 

 9-10-articulato, § pedunculi breviore, articulis in apice filum olfactorium vel duo quibusque 

 gerentibus, a. 1-mo e duobus composito vel simphci. Antennse inferiores fere pedunculum 

 superiorum longitudine sequantes. Branchiae elongate-elipticse. Pedes paris 1-mi manu 

 pyriformi, palma in angulo subbasali spinam obtusam gerente, ungue curvato, in margine 

 posteriore denticulato ; p. 2-di manu elongatissima, fortissima, quadruplum longiore quam 

 lata, margine anteriore fere recto, palma in dimidio apicali inter duos dentes obtusos rotun- 

 dinaliter excavata, ungue curvo, margine posteriore in medio incrassato ; p. posteriores 3 

 breviores, articulis abbreviates, tarso panlulum curvato, seque lato vel in basi latiore, ungue 



