Cerapopsis, Neohela 675 



comparatively sbort, robust, 3*^ — 5*'^ short, 6^^ enormously developed, bind 

 niargin produced to a bifurcate process, tbe very large curved tinger forming 

 a very elongate coue or an actual cylinder, and combining witb tbe variable 

 process of tbe 6*^ Joint to form a true didactyle cbela. Gnatbopod 1 in 9 , 

 b^^ Joint as broad as 6*^, and a little longer, 6*^ almond-shaped, finger 

 large but shorter than 6* Joint, which in young d it outstrips in length. 

 Gnatbopod 2 in 9 a little larger tban gnatbopod 1 ; 3^ and 4*^ joints sbort, 

 5*^ also sbort, broader tban long, 6*^ almond-sbaped, tinger robust but sboi*t. 

 Peraeopods 1 and 2 slender, tinger small and sligbt. Peraeopod 3, 2<^ Joint 

 almost circular, its margins entire; tbe otber joints sbort, compact, 6*^ witb 

 apical seta, finger sbort, stout. Peraeopod 4 ratber longer; 2*^ Joint less 

 broad, 6^^ witb apical spine simulating a second finger. Peraeopod 5 ratber 

 longer, 2*^ Joint scarcely balf as long as broad, finger arclied. Pleopods 1—3, 

 peduncle ratber stout, inner ramus narrower but ratber longer tban outer, 

 inner raargin of 1^* Joint smootb; outer ramus proximally very broad, 

 üropods 1 and 2 not very spinöse. Uropod 3, peduncle longer tban ramus, 

 wbicb is sligbtly incurv-ed and tapering, witb apical spine. Telson triangulär, 

 witb 2 setules on eacb side of upper surface, apex rounded. Colour in d, 

 bead and segments yellow in front, brown bebind, side-plates 1 — 4 each 

 witb a brown blotcb; in Q back ligbt brown, yellow blotches on sides; 

 eggs (large, very few) reddisb yellow. L. 3 mm. 



Bay of Naples. In fine sand, depth 10 — 20 m. 



8. Gen. Neohela S. I. Sm. 



1861 Heia (Sp. un.: H. monstrosa) (non Münster 1840, Decapoda!), A. Eoeckin: 

 Forh. Skand. Naturf., Mede 8 p. 668 | 1876 H., A. Boeck, Skand. Arkt. Amphip., v.2 

 p. 643 I 1886 H., Gerstaeeker in: Bronn's KI. Ordn., v.bn p. 495 | 1881 Neohela, S. 

 I. Smith in: P. U. S. Mus., v.^ p.448 | 1888 N., T. Stebbing in: Rep. Voy. Challeuger, 

 u'J9 p. 322, 325, 1215 | 1893 N., A. Della Valle in: F. Fl. Neapel, u 20 p. 342 | 1894 

 N., G. Ü. Sars. Crust. Norway, v.\ p. 623 j 1882 Helella, G. O. Sars in: Forh. Selsk. 

 Christian., nr. 18 p. 31. 



Body very slender, tapering backward; pleon sligbt, subcylindric, 

 abruptly narrower tban peraeon. Head quadrate. Side-plates small and sballow, 

 not contiguous. Antennae 1 and 2 very long and slender, 1^* witb well 

 developed accessory flagellum. Upper lip bilobed. Maxilla 2 not fringed on 

 side of inner plate, otberwise moutb-parts in general as in ünciola (p. 676). 

 Gnatbopods 1 and 2 subcbelate; 2^ Joint narrow, 5*^ not sbort, finger elongate. 

 Peraeopods 1 — 5 long and slender, 2^ Joint linear. Pleopods 1 — 3 very 

 slender and feeble. Uropods 1 and 2 bii-amous, slender, tbe rami spinöse; 

 uropod 1 mucb tbe longer. Uropod 3 small, peduncle very small, tbe 

 Single ramus mucb longer. Telson imperfectly defined from pleon segment 6, 

 smootb, distally tapering. 



2 species. 



Synopsis of species: 



Eyes imperfectly developed, represented by whitish pigment 1. N. monstrosa . p. 675 

 Eyes prominent, salmon-coloured 2. N. phasma . . p. 676 



1. N. monstrosa (Boeck) 1861 Heia ni., A. Boeck in: Forh. Skand. Naturf., 

 Mede 8 p. 668 | 1876 H. m., A. Boeck, Skand. Arkt. Amphip., v. 2 p. 643 t. 32 f . 1 | 1881 

 Neohela m., S. I. Smith in: P. U. S. Mus., v.3 p.448 ] 1887 N. m., H. .1. Hansen in: 

 Vid. Meddel, ser. 4 i\ 9 p. 168 | 1893 N. m. (part.), A. Della Valle in: F. Fl. Neapel, 

 V. 20 p. 343 t. 55 f. 19—24 [ 1894 N. m., G. 0. Sars, Crust. Norway, v. 1 p. 624 t. 224 | 

 1882 Helella m., G. 0. Sars in: Forh. Selsk. Christian., nr. 18 p. 31. 



43* 



