208 Colomastix, Lafj-stiidae, Lafystius 



long, shorter than the large G*^, which is oblong oval, with obscurely detined 

 undivided palm. üropod 1, oue ramus slender, tlie othera little longer 

 and very much broader, except at the rather abruptly acute apex. Telson 

 (in fig.) seemingly oval. L. 2-5 mm. 



Red Sea. 



14. Farn. Lafystüdae 



1893 Laphystiidae, G. 0. Sars, Crust. Norway, n 1 p. 382. 



Body depressed. Head, rostrum broad, tapering, not acute. Side- 



plate 4 the deepest. Eyes distinct. Antenna 1 stouter and longer than 



antenna 2, no accessory flagellum. Upper lip entire, 



Paip distally narrowed. Lower lip without inner lobes. Mandible, 



_ Oiiter cutting edge dentate, accessory plates on left and right, no 



^ * * spine-row or molar, palp large, 3"^ Joint longest. Maxiila 1, 



Inner inner plate with 3 setae, outer with 8 spines, palp rudi- 



^^^^^ mentary, nodiform. Maxilla 2, outer plate longer than 



inner, inner setiferous on inner margin. Maxillipeds 



(Fig. 54), inner plates narrow, not short, outer lai'ge, 



Fig. 54. overlapping the 2-jointed palp. Gnathopod 1 simple, 



^axiuf edr* gnathopod 2 weakly subchelate. Peraeopods 1—5 stout, 



subequal, finger uncinate. Uropod 3, rami obtuse, inner 



the longer. Telson small, entire. 



Marine. 



1 genus, 1 species. 



1. Gen. Lafystius Kr0yer 



1842 Lafystius (Sp. un.: L. sturionis), Kreyer in: Naturh. Tidsskr., t\4 p. 156 | 

 1888 L., T. Stebbing in: Rep.Voy. Challenger, r"29 p. 898 ] 1893 L., A. Della Valle 

 in: F. Fl. Neapel, ?'. 20 p. 587 | 1846 Laphystius (nora. em.), L. Agassiz, Nomencl. zool., 

 Index p.200, 202 I 1876 L., Lafystius, A. Boeck, Skand. Arkt. Amphip., v.2 p. 250. 712 | 

 1893 Laphystius, G. 0. Sars, Crust. Norway, n 1 p. 383 | 1856 Daruinea (nom. niid.). 

 Bäte in : Rep. Brit. Ass., Meet. 25 p. 58 \ 1857 Darivinia (Sp. un. : D. compressa), Bäte 

 in: Ann. nat. Hist., ser. 2 ».19 p. 141 | ?1870 TJerniophilus (Sp. un.: D. lopliii) (non 

 Dermatophilus Gueriu-Meueville, 1829—38, Diptera), E. Beneden & Bessels in: Mem. 

 cour. Ac. Belgique, r. 34 nr. 4 p. 26 | ?1873 Ichthyomyzocus (part.), E.Hesse in: Ann. 

 Sei. nat., ser. 5 v.ll nr. 7 p. 5 | ?1877 Desmophilus. Huxley, Man. Anat. Invert., p. 367. 



With the characters of the family. 



1 species. 



1. L. sturionis Kroyer 1842 L. s., Kreyer in: Naturh. Tidsskr., r. 4 p. 157 i 

 1875 L.S., Schiedte in: Naturh. Tidsskr., ser. 3 r. 10 p. 237 t. 5 f. 9 18 | 1876 L. s., 

 A. Boeck, Skand. Arkt. Amphip., v.2 p. 252 1. 19 f. 6 | 1888 L. s., T. Stebbing in: Rep. 

 Voy. Challenger, r. 29 p. 899 t. 137d \ 1893 L. s., A. Della Valle in: F. Fl. Neapel. u20 

 p. 588 t. 6 f. 8; t. 32 f. 20— 37 [ 1893 Laphystius s., O. O. Sars, Grast. Norway, v.l 

 p.384 1. 134 ! 1856 Darioinea compressus (nora. nud.), Bäte in: Rep. Brit. Ass., Meet.25 

 p. 58 I 1857 Darivinia compressa. Bäte in: Ann. nat. Hist., ser. 2 ?;. 19 p. 141 | ?1870 

 Dermophilus lophii, E. Beneden & Bessels in: Mem. cour. Ac. Belgique, ».34 nr. 4 p.26 | 

 ?1873 Ichthyomyzocus morrhuae, E. Hesse in: Ann. Sei. nat., ser. 5 v. 17 nr. 7 p. 7 

 t. 4 f. 3—7. 



