218 Iphimedia, Acanthonotozoma 



ßobust, thick. Ej'es verj^ large, subreniform, black. Antenna 1 the longer, as long 

 as ^/s length of body, basal joints thick. Gnathopods 1 and 2 with equal subcheliform 

 hands of moderate size. Uropods 1 — 3 slender, smooth, uropod 3 with 2 rami. Telson 

 an elongated scale. Colour crinison with flake-white blotches. L. 6*7 mm. 



Port Jackson [East-Australia]. In circumlrttoral zone, on weedy and sandy bottoms. 



4. Gen. Acanthonotozoma*) Boeck 



1802 Talitrus (part.), Latreille, flist. Grast. Ins., v. 3 p. 38 | 1835 Acanthonotus 

 (Sp. uu.: A. cristatus) (non G. Cuvier 1800, PiscesI), (Rieh. Owen in MS.) J. C. Ross 

 in: John Ross, App. sec. Voy., nat. Hist. p. 90 ] 1876 Acanthonotozoma (Sp. typ.: 

 Acanthonotus cristatus), Acanthozoma (laps.), A. Boeck, Skand. Arkt. Amphip., v. 2 

 p. 237; p. 229, 712 ; 1888 Acanthonotozoma, T. Stebbing in: Rep. Voy. Challenger, r. 29 

 p. 162 ] 1894 A., T. Stebbing in: Bijdr. Dierk., ?;. 17 p. 31 | 1880 Acanthonotosoma, 

 D'Urban in: Ann. nat. Hist., ser.'S v.ß p. 255 ] 1893 A., 6. 0. Sars, Crust. Norway, v. 1 

 p.372 1 1893 A. (part.), A. DellaValle in: F. Fl. Neapel, u20 p. 674. 



Back strongly curved. Rostrum acute, reaching apex of 1^* Joint of 

 antenna 1. Side-plates 1 — 3 tapering to acute apex, 4^'^ large with 2 emargi- 

 nations, 5**^ and 6*^^ with hind lobe the deeper. Antennae 1 and 2 not elongate. 

 Upper lip rather long, apically narrowed, unsymmeti-ically incised. Lower 

 lip, lobes nearly contiguous, tapering towards apex, inner lobes almost 

 obsolete. Mandible elongate, tapering to narrow dentate cutting edge, accessory 

 plate narrow on both mandibles, spine-row evanescent, molar obsolete, palp 

 slender. Maxilla 1, inner plate triangulär, with raany setae, outer obliquely 

 ti-uncate, with 11 spines, palp slender, its 1^*^ Joint not very short. Maxilla 2, 

 inner plate the shorter, fringed along most of inner margin, both plates 

 obliquely truncate. Maxillipeds, inner plates long, outer scarcely larger, 

 reaching apex of 2^^ Joint of ^alp, palp rather small, finger minute. Gnatho- 

 pod 1 feeble, very slender, gnathopod 2 shorter and stouter, both pairs 

 simple. Peraeopods 1 — 5 rather stout. Peraeopods 3 — 5, 2^ Joint quadrangular. 

 lower hind corner acute. Uropod 3, outer ramus the shorter. Telson tapering 

 to a slightly incised apex. 

 3 species. 



Synopsis of species: 

 J Carina absent from peraeon, not dentate on pleou . 3. A. inflatum . . ]). 219 

 ) Carina present on peraeon, dentate on pleon — 2. 

 ^ Carina not forming acute procosses on pleon segments 



3 and 4 1. A. serratum . p. 218 



Carina forming acute processes on pleon segments 



3 and 4 2. A. cristatum . ]). 219 



1. A. serratum (0. Fabr.) 1780 Oniscus serratus, 0. Fabricius, Fauna Groenl., 

 p.262 I 1802 O.S., Talitrus {p&rt.i Latreille, Hist. Crust. Ins., v.ä p.39 | 1853 Acantho- 

 notus s., Stimpson in: Smithson. Contr., i;. 6 nr. 5 p- 52 | 1866 Vertumnus s., Goes in: 

 Öfv. Ak. Förh., v. 22 p. 522 j 1876 Acanthonotozoma serratum, A, ßoeck, Skand. Arkt. 

 Amphip., V.2 p. 240 | 1893 Acanthonotosoma s., G. 0. Sars, Crust. Norway, vA p. 374 

 t.l31 f.l I 1893 A.s. (part.), A. DellaValle in: F.Fl. Neapel, «^20 i).675 t. 59 f.83, 84 

 1838 Amphithoe serra, Ivröyer in: Danske Selsk. Afh., v.7 p. 266 t. 2 f. 8 | 1840 

 Acanthonotus s., H. Milne Edwards, Hist. nat. Crust., v. 3 p. 25. 



Body stout, carina low on peraeon segments 1 — 4, on segments 5 — 7 and 

 pleon segments 1 and 2 produced into well marked, not very large, backward 

 pointing teeth, on pleon segment 3 into a laminar obtusely ending process. 

 Head, lateral corners small, naiTOwly rounded. Side-plate 4 with an acute 



*) According to the rules of transcription this name should be written Acantho- 

 notosoma. The Editor. 



] 



