Cleonardo, Rhachoti-opis 



347 



Flagellum 



2" Joint 



e«" Joint 



1. C. longipes Stebb. 1888 C. l, T. Stebbing in: Rep. Voy. Challenger, t\ 29 

 p. 959 t. 86 j 1893 Pontogeneial, A. DeüaValle in: F. El. Neapel, u20 p.618 t.59 f. 31. 



9 unknown. — d. Head, rosti'um short and broad. Side-plates 1 — 4 

 rounded below. Pleon segments 1—3, postero-lateral corners more or less 

 acutely produced. Eyes not perceived. Antenna l, 1^* Joint stout, with 

 obtuse apical tooth, 2^ rather longer, i^ very 

 Short, flagellum longer than pedoncle, with 

 46 joints, only P* Joint long, most with 2<^ and 

 3*^ joints of peduncle calceoliferous. An- 

 tenna 2 (Fig. 82) rather shorter. ultimate and 

 penultiraate joints of peduncle long, ultimate 

 the sliorter and much narrower, flagellum 

 shorter than peduncle, with 35 joints, many 

 with ultimate Joint of peduncle calceoliferous. 

 Guathopods 1 and 2 rather strong, 5*^ Joint 

 cup-shaped, with spinöse hind lobe, 6* oval, 

 apically narrowest, palra long, oblique, curved, 

 ciliated, defined by a tooth with palmar 

 spines. Peraeopods 1 and 2, tinger as long 

 as 6*ii Joint, with setules on the convex 

 margin. Peraeopods 3 — 5, 2*^ Joint oval, 

 in peraeopod 5 (Fig. 83) produced some- 

 what downward. 5*-'^ — 1^^ joints very long 

 and slender. Pleopods 1 — 3, each pair closely 

 united by very sliort coupling spines and 

 numerous cleft spines. Uropods 1 — 3 very 

 spinulose, outer ramus shorter and narrower 

 than inner. Telson nearly reaching end of uropod 3, cleft for more than 

 ^/^ of leugth, margius finely pectinate, apices acute, not dehiscent. L. 10 mm. 



South-Pacific (lat. 37» S., long. 83« W.). Depth 3244 m. 



2. C. appendieulatus (0. Sars) 1879 Tritropis? appendiculata, G. O. Sars 

 in: Arch. Naturv. Kristian., f. 4 p. 451 ( 1885 T. a., G. O. Sars in: Norske Nordhavs- 

 Exp., V.6 Crust. I p. 194 t. IH f. 3, 3 a | 1888 T. a., Cleonardo (part.), T. Stebbing in: 

 Rep. Voy. Challenger, i;. 29 p. 498, 959 | 1893 Pontogeneia?, A. Della Valle in: F.Fl. 

 Neapel, ü. 20 p. fi20. 



Peraeon inflated, back rounded, pleon segments 1 — 3 with distinct 

 but low central cariua. Head. rostrum exceedingly small, slightly curved, 

 lateral corners slightly produced, narrowly rounded. Pleon segments 1 — 3, 

 postero-lateral corners acute, postero-lateral margius quite smooth. Eyes 

 very small, oval, placed low down, pigment light, whitish. Antennae 1 

 and 2 nearly as in C. longipes. but 2*^ Joint of antenna 1 rather shorter 

 than 1^*. Mouth-parts undescribed. Gnathopods 1 and 2, peraeopods 1 — 5 

 closely resembling those in C. longipes. Uropods 1 — 3 each with lanceolate, 

 equal rami, without distinct spines or setae. Telson unknown. Colour 

 whitish, translucent. L. 13-5 mm. 



Arctic Ocean (lat. 71» N., long. 13» E.). Depth 2423 ni. 



Fig. 82. 



Antenna 2 with 



calceolus. 



Fig. 83. 

 .Peraeopod 5. 



Fig. 82 & 83. C. longipas, (J. 



5. Gen, Rhachotropis S, I, Sm, 



1871 Tritropis (non Fitzinger 1843, Reptilia!) (part.), A. Boeck in: Forh. Selsk. 

 Christian., 1870 p. 158 | 1883 Rhachotropis, S.I.Smith in: P. U.S. Mus., v.6 p. 222 ! 

 1888 R., T. Stebbing in: Rep. Voy. Challenger, v.29p.954 | 1893 R., G. 0. Sars, Crust. 

 Norway, v. 1 p. 423 | 1896 Rachotropis, J. Bonnier in : Ann. Univ. Lyon, v. 26 p. 653. 



