Phüas, Pereionotus 201 



Guerio) with peduncle short, and 2 much longer, equal, ciliated rami. Uropod 1 

 with blunt equal rami, as long as peduncle. üropod 2 wauting as in 

 Pereionotus ( 9 ). üropod 3 very short, with 2 conical rami as long as 

 peduncle. Telson small, transverse, i\ little rounded (text) or a little emarginate. 



1 species. 



1. P. serratus Guer. 1836 F. s., Guerin (-Meneville) iu: Mag. Zool., Ol. 7 t. ll> 

 1. 1 4 I 1862 F.S., Bäte, Cat. Amphip. JBrit. Mus., p.88 t.Ua f.2 (on t. 21) j 1888 P. s., 

 T. Stebbing in: Rep. Yoy. Challenger, r. 29 p. 165 etc. | 1893 P.S., A. DellaValle in: 

 F. Fl. Neapel, r. 20 p. 561 ; 1899 P.S., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 

 V. 7 p. 417. 



Colour opaque yellow brown. L. 5 — 6 mm. 



South-Pacific (between the Malouines (Falkland) Isles an<l Port .lackson fEast- 

 Aiistralia]) ; Mediterranean. 



2. Gen. Pereionotus Bäte & Westw. 



1862 Pereionotus (Sp. un.: P. testudo), Bäte & Westwood, Brit. sess. Crust., v. 1 

 11.226 i 1888 P., T. Stebbing in: Kep. Yoy. Challenger, v.2% p. 340 ] 1893 P., A. Della 

 Valle in: F. FL Neapel, r.20 p. 559 | 1899 P. (part.), T. Stebbing in: Tr. Linn. Soc. 

 London, ser. 2 v.l p. 416 | 1864 Icridium (Sp. un.: I.fuscum), E. Grube in: Jahresber. 

 Schles. Ges., v. 41 p. 58. 



Body depressed, ridged, hiud part of pleou ventrally flexed. Head, 

 rostrum short, obtuse, lateral corners carrying prominent eyes. Antennae 1 and 2 

 small, antenna 1 the larger, flagellum in both small, Upper lip bilobed. 

 Lower lip without inner lobes. Mandible, cuttiug edge dentale, spine-row of 

 very few spines and a seta, molar and palp wanting. Maxilla 1, inner 

 plate wanting, outer plate with 5 spines, palp wanting, its place indicated 

 by a bulge of the margin. Maxilla 2, inner and outer plate coalesced except at 

 apex. Maxillipeds, inner plates with 3 spine-teeth on truncate apex, outer 

 plates almost unarmed, reaching end of 2'^ Joint of palp or further, palp small, 

 of 3 joints, 1^^ largest. Gnathopods 1 and 2 simple. Peraeopods 1 — 5 as in 

 gnathopods 1 and 2 with hooked fiuger. Peraeopods 3 and 4, 2*^ Joint roundly 

 expanded. 4*'' Joint also wide. Peraeopod 5, 2*^ and 4^^ joints smaller than 

 in peraeopods 3 and 4. Pleopods 2 and 3 sending out an arm from peduncle 

 (as in Iphiplateia, p. 203, but much shorter), tipped with 3 coupling spines. 

 Uropod 1 reaching much beyond the others, peduncle as long as or longer 

 tlian rami, outer ranms rather the shorter, slightly curved, both rami obtuse, 

 tipped with-'short, blunt spiue. In o (?) uropod 2 not developed, uropod 3, 

 peduncle subequal to Single spine-tipped ramus. In ö (?) uropod 2 much 

 shorter than uropod 1, but otherwise similar, especially as to the obtuse rami. 

 the pair of peduncles distally convergent, uropod 3 very short. with tubercle 

 on inner margin of peduncle, Single ramus not longer than broad. much 

 shorter than peduncle. Telson small, triangulär, depressed. 



1 species. 



1. P. testudo (Mont.) 1808 Oniscust., Montagu in: Tr. Linn. Soc. London, r.9 

 p. 102 ! 1862 PereionoUis t., Bäte & Westwood, Brit. sess. Cru.st., v. 1 p. 228 f. ; 1893 

 P. t., A. DellaValle in: F. Fl. Neapel, i;.20 p. 559 t.3 f. 7; t.31 f. 1—19 | 1862 Phlias 

 rissoamis, Bäte, Cat. Amphip. Brit. Mus., p.88 t. 14a f. 3 (on t. 21) | 1875 Icridium 

 rissoanum, Catta in: Rev. Sei. nat., v.4 p.l6l | 1864 I.fuscum, E.Grube in: «Jahresber. 

 Schles. Ges., v. 41 p. 58 i 1864 I. f., E. Grube in: Arch. Naturg., v.SOi p. 209 t. 5 

 f. 3, 3 a— f. 



