Perrierella, Normanion 41 



Body compact. Side-plates not large, P* partly concealed. Both 

 pairs of antennae short, peduucle of antenna 1 rather elongate." A deep groove 

 betweea epistome aiid upper lip. Mandible stout, molar obsolete, 1** Joint 

 of palp very sbort. Maxilla 1, inner plate with 3 setae, outer with 7(?) 

 spiues, palp with minute teeth and spines. Maxilla 2, plates rather short, 

 inner the broader. Maxillipeds, inner plates minute, caiTying 3 spines, outer 

 elongate with spines on inner margin, palp only 3-jointed, not reaching 

 beyond outer plate. Gnathopod 1, 6**^ Joint rather longer than b^^, oval, making 

 an approach to a palm, so as to be weakly subchelate. Gnathopod 2 slender, 

 elongate, subchelate or almost cbelate. Peraeopods 1 — 5 short and stout, 

 4**^ Joint rather broad, 6^^ produced to a short tooth-like process. Uropod 3, 

 peduncle short, rami short, outer rather the longer, 2-jointed. Telson entire. 



1 species. 



1. P. audouiniana (Bäte) 1857 Lysianassa a., Bäte in: Ann. nat. Hist., ser. 2 

 V. 19 p. 138 I 1862 L. a., Bäte, Cat. Amphip. Brit. Mus., p. 69 t. 11 f. 1 (excl. lg) | 1889 

 Lysianax audouitiianus, A. ü. Walker in: P. Liverp. biol. See, f. 3 p. 203 1. 10 f. 9, 10 | 

 1890 Aristias audouiniana, 3Ieinert in: Udb. Hauchs, r. 3 p. 152 1. 1 f . 1 — 6 | 1892 

 PararistidS audouinianus, D. Robertson in: P. nat. Hist. Soc. Glasgow, n. ser. v.S p. 201 j 

 1893 Perrierella audouiniana, J. Bonnier in: Bull. sei. France Belgique, v.24 p. 175 

 t. 5 I 1895 P. a., G. 0. Sars, Crust. Norway, v. 1 p. 678 t. ii f . 2 | 1875 Aristias tumidus 

 (err., non Anonyx t. Kreyer 184H!), Cam. Heller in: Denk. Ak. Wien, v.S5 p. 30 t. 2 

 f . 1 — 7 I 1892 Perrierella crassipes, Chevreux & E. L. Bouvier in: Bull. Soc. zool. France, 

 V. 17 p. 50 f. I 1893 P. c, A. Della Valle in: F. Fl. Neapel, v.20 p.841. 



Head deep, lateral angles slightly produced. Side-plate 4 little emarginate 

 behind. Pleon segment 3 at postero-lateral angles almost quadrate. Eyes large, 

 irregularly oval, dark with chalky white coating. Antenna 1, 2^ and 3^ joints 

 not very short, flagellum with 4 joints, 1®* the longest, accessory flagellum 

 2-jointed. Antenna 2, ultimate and penultimate joints of peduncle subequal, 

 flagellum 4-jointed, much shorter than that of antenna 1. Palp of maxilla 1 

 ends in 4 crenulate teeth (Chevreux & Bouvier), or in 3 spines and a serru- 

 late margin (Robertson, Sars' figure), or in 3 setae (Heller), or in 8 spinules 

 (Bounier). Maxillipeds, the palp has a tuberculiform 4**^ Joint (Chevreux & 

 Bouvier, contrary to Heller, Bonnier and Sars). Uropod 3 has the rami 

 finely serrulate. Telson nearly twice as long as broad (Sars; not so long 

 in Bonnier's figure), narrows distally to a slightly emarginate apex. Colour 

 yellowish (Sars), whitish slightly tinted with rose on the back (Chevreux), 

 eggs pale green (Bonnier). L. 2 — 4 mm. 



North -Atlantic, North-Sea and Kattegat (Great Britain, France, West-Norway); 

 Mediterranean. Commensal in sponges. 



23. Gen. Nortaanion Bonnier 



1871 Normania (Sp. un.: X. quadrimana) (non G. S. Brady 1866, Ostracoda!), 

 A. Boeck in: Forh. Selsk. Christian., 1870 p. 119 | 1890 N.^ G. 0. Sars, Crust. Norway, 

 vA p.32 I 1893 N., A. Della Valle in: F. Fl. Neapel, t?. 20 p. 796 | 1893 Normanion, 

 J. Bonnier in: Bull. sei. France Belgique, v.24 p. 167, 173 | 1895 N., G. O. Sars, Crust. 

 Norway, v. 1 p. 674. 



Body compact, side-plates not very deep, 4*^ little excavate behind. 

 Pleon segment 3, postero-lateral angles rounded. Antenna 1 and 2 in Q short, 

 2^ and 3*^ joints of antenna 1 not extremely short. Epistome not defined 

 from Upper lip. Mandible, molar weak, palp long, set far back, 1^* Joint 

 short. Maxilla 1, inner plate with 2 small apical setae, 2^ Joint of palp 

 broad. Maxilla 2, plates rather narrow, only apically armed. Maxillipeds, 

 inner plates long and narrow, outer long and broad, unarmed, reaching much 



