296 Calliopiiis 



CaUiopius, W. Lilljeborg in: N. Acta Soc. Upsal., ser. ü v.Ü iir. 1 j). 18, lü | 187H < ., 

 A. Boeck, Skand. Arkt. Amphip., r. 2 p. 344 | 1893 C, G. O. Sars, Crust. Nonvay. ?< 1 

 p. 446 I 1866 Faramphithoe, Goes in: Öfv. Ak. Förh., ii22 p. 523. 



Body rather strongly built, without dorsal teeth. Side-plates of modcia^' 

 size. Antenuae 1 and 2 not veiy slender, subequal, 3^ Joint of pednnelt» 

 of antenna 1 apically produced, no accessory flagellum, joints in flagell;) 

 sharply defiued, calceoli in both sexes. Moutb-parts ueaiiy as in Apberusa (p. ;if »4 >. 

 but palp of mandible larger, with 3'^ Joint as long as 2^. Gnathopods 1 

 and 2, 5*^' Joint short, cup-shaped. G*^' large, oval, palm longei* thau liind 

 margin, weakly defined. Peraeopods 1 — 5 rather strongly bnilt. finger curved. 

 not elongate. 3*^ — 6^^ pairs witb 2*^ Joint oval, üropod 3 scarcely reacbing 

 beyond the otliers, pednncle short. ranii lanceolate, subequal. Telson entiie. 

 linguiform. 



2 species accopted, 1 ol).scure. 



Synopsis of accepted species: 



Antonna 1, 3d Joint produced into a large lobe .... 1. C. laevmseuliis . j>. 2'<'> 

 Antenna 1, 3d Joint prodnced into a small lobe .... 2. C. rathkii .... |i. St'H 



1. C. laeviusculus (Kröyer) 1838 Amphithoe laeviuscula, Kröyer in: J)an.sk'- 

 Selsk. At'h.. vJ p.281 t.3 f. 13a— h | 1859 Pammphifhoel., R. M. Hruzelius in: Svenska 

 Ak. Handl., n. ser. r. 3 nr. 1 p. 76 j 1861 Amphithopsis l., A. Boeck in: Forli. .Skand. 

 Xaturl.. Made 8 p.662 | 1862 CaUiopel., Hate, Cat. Amphip. Brit. Mn.s.. p. 148 t.28 f.Ü 

 1871 Cnlliopins laeviusctdus, A. Boeck in: Forh. Selsk. Christian., 1870 p. 197 j 1876 C.i 

 (part.), A. Boeck, Skand. Arkt. Amphip., v.2 p. 345 | 1893 Acanthozone laeviuscula (part. i, 

 A. DellaValle in: F. Fl. Neapel. 'j).20 p. 602 t. 59 f. 12 ] 1856 CalUope leachii, Bäte in: 

 Rep. Brit. Ass., Meet. 25 p.58 1. 17 f. 3 1 1857 C. l, Bäte in: Ann. nat. Hi.st., ser.2 /•. 19 

 p. 142 I 1858 Amphithoe serraticornis, M. Sars in: Forh. Selsk. Christian., ji. 140. 



Pleon Segments 1 — 3 dorsally raised at end, giving an imbricated 

 appearance. Head, rostrum obsolete, lateral corners obtusely rounded. l^leon 

 Segment 3, postero-lateral corners subquadrate. Eyes oval, reniforni. very 

 dark, larger in d than in Q . Antenna 1 of Vs It'ugth of body, !***■ Joint a.s 

 long as 2^ and 3* combined, 3^ produced beyond 1^^ Joint of Hagelluiu. 

 with row of 8 calceoli ou the triangulär lobe. Ilagelluni rather b)nger tliaii 

 peduncle, with 20 — 30 joints sharply defined, as though the flagelhnn were 

 serrate. Antenna 2 scarcely longer, flagellum similar in appearance. sul«- 

 equal to peduncle. (inatliopods 1 and 2 strongly huilt. 5*^'* Joint with setose 

 lobe, <>*'' Wide at l)ase, narrowing from commencement of oblique palni to 

 iiinge of ünger. Peraeopods 1-5 stroug, 2*^ Joint of 5*'' pair rather large. 

 especially in the d. üropod 3. both rami plumose and spinöse. Telson 

 nearly twice as long as broad. a little dihited at liase, smootlily rounded 

 at apex. Colour uniformlv light green. with wliitish area on front of )>ack. 

 L. 9 12, d 13-14 mm. ' 



Arctic Ocean, North-Atlantic, North-Sea and Skagerrak (Greenland; Spitzbergen: 

 Labrador; Noi*way, depth 6 — 56 m; British Isles); Nortli-Pacific. 



2. C. rathkii (Zadd.) 1844 Amphithoe r., Zaddach, Syn. Crust. Prnss.. p »i 

 1893 CaUiopius rathkei, G. 0. Sars, Crust. Xorway, vA p.447 1. 157 f. 2 | ■:'1847 Amphi- 

 tJioe gibba, (H. Frey &) R. Leuckart, Wirbell. Th., p. 162 | 1862 CalUope gramlocuUs, 

 Bäte, Cat. Amphip. Brit. Mus., p. 149 t. 28 f. 4 | 1879 CaUiopius laeviusculus (err., nou" 

 Amphithoe laeviuscula Kröyer 1838!). Hoek in: Tijdschr. Nederl. dierk.A^er.. r.4 p. 138 

 t. 6 f.4, 6, 7, 10—12; t. 10 f. 7. 



