Cyclocaris, Lysianella 31 



2. C. guilelmi Chevreux 1899 C. g., Chevreux in: Bull. Soc. zool. France^ 

 f. 24 p. 148 f. 1-5. 



Body robust. Head with little recurved rostriiin, lateral angles faintly 

 indicated, post-antennal corners more salient, rouoded. Side-plate 1 almost 

 rectangular, with spinule on lower margin, 2^ rather larger, rounded below. 

 Pleon Segment 3, postero-lateral corners subacute. Eyes wanting. Jjower 

 lip with lobes distally obliquely truncate. Mouth-parts in general form 

 agreeing with C. tahitensis (p. 30), but mandible carrying a dentiform 

 molar process, very elougate, curved at the extremity and furnished with 

 a row of small setae. Gnathopod J, 6*^^*^ Joint rather stouter than in 

 C. tahitensis, regularly tapering. Gnathopod 2, 5*"^ Joint little louger than 3^. 

 Uropod 1. inner ramus - ^ as long as peduncle, outer notably shorter. 

 Uropod 2, inner ramus a little shorter than peduncle, outer -/^ as long aa 

 inner. L. 11 — 12 mm. 



Arctic Ocean (Lofoteu Isles). Deptli 1095 in. 



17. Gen. Lysianella 0. Sars 



1882 Lysianella (Sp. un.: L. petalocera). G. 0. Sars in: Forh. Selsk. Christian.,, 

 nr. 18 p. 78 | 1890 L., G. 0. Sars, Crust. Norway, v. l p. 50 | 1898 L., J. Bonnier in: 

 Bull. sei. France Belgique. v. 24 p. 174 ! 1898 L., A. Della Valle in: F. Fl. Neapel^ 



f. 20 p. 797. 



Body shorter and stouter in ö than in o ; side-plates deep, 4*^ 

 strongly excavate behind. Antenna 1 stouter in d, 1^* Joint of flagellum 

 large and setose in Ö. small in Q, accessory flagellum long in both sexes. 

 Antenna 2 alike in d and Q , about as long as antenna 1, penultimate Joint of 

 peduncle oval, broadly laminar, densely furred on inner surface. Mouth- 

 organs prominent below. Upper lip jutting out much in front of epistome. 

 Mandible strong, molar small and weak. palp short, attached behind molar, 

 its 'd^ Joint the lougest. Maxilla 1, inner plate tapering, with 2 setae, 

 otherwise normal. Maxilla 2, plates narrow, armed at apices. Maxillipeds, inner 

 plates acutely tapering, outer plates narrow oval, palp slender, 2*^ Joint longer 

 than P*, 4*^ rather small. Gnathopod 1 subchelate, 5^*^ and 6*^ joiuts sub- 

 equal, 7*^^ small. Gnathopod 2, tending to minutely chelate. Peraeopods 

 1—5 slender. Peraeopods 3 — 5, 2*^ Joint large, longer than broad. Uropod 3 

 small, rami subequal, as long as peduncle, outer raiims 2-jointed, the 2*^ 

 about 7:} as long as the 1^*. Telson small, oval, entire or partially deft 



2 species. 



Synopsis of species: 



Telson entire 1. L. petalocera . p. 31 



Telsoi) partially cleft 2. L. dellavallei . p. 32 



1. L. petalocera 0. Sars 1882 L. p., G. O. Sars in: Forh. Selsk. Christian.,, 

 nr. 18 p. 78 t. 8 f. 3,3 a i 1890 L. p., G. 0. Sars, Crust. Norway, v. 1 p. 51 t. 18 f. 2 | 1893 

 L.p., A. Della Valle in: F. Fl. Neapel, v. 20 p. 797 t. 61 f. 9.' 



Head, lateral corners subangular, less projecting in ö than in g . 

 Pleon Segment 3, corners obtusely rounded. Eyes oval, dark purplish brown 

 with reddish coating, larger in d. Antenna 1, flagellum 8-jointed, accessory 

 flagellum 4-jointed, 1«* Joint the longest; antenna 2, flagellum 8-jointed. 

 Gnathopod 1, 6*^ Joint of nearly uniform width, palm oblique, not very large, 

 finger short, simple. Gnathopod 2, 6*^ Joint about half length of 5*^, produced 



