206 Coloruastioidae. Colomastix 



13. Farn. Colomastigidae 



189)3 Subord. Suhlpcrini, A. J)ellaY:ille in: F. Fl. Neapel, f. 20 p. 853 | ISlti.» 

 Colomastiäae, Clievrcux in: C.-R. Ass. Franr.. Sc^s. 27 r. 2 p. 483 ] 1899 Colomastigidae, 

 T. Stebbing in: Ann. nat. Hist., ser. 7 v.-i ]). 211. 



Body cylindric, subdepressed. Head, rostrum small, acute. Side-platcs 

 all shallow, none bilobed. Eyes distinct. Antenuae 1 and 2, peduucle well 

 developed, flagelliim ininute, anteuna 1 (always?) the longer, witliout accessoiy 

 flagellum, Epistome conical. Upper lip bilobed. Lower lip probably without 

 inner lobes. Mandible, cutting edge divided into spine-like teetb, no accessory 

 plate, spine-row, or palp; molar small. . Maxilla 1, inner plate wanting, outer 

 feebly armed, palp 1-jointed. Maxilla 2, inner plate the broader, only sligbtly 

 separated from outer. Maxillipeds, inner plates completely coalesced, outer 

 broad, reaching to middle of palp's 2'^ Joint, palp 4-jointed, 3'^ Joint longest. 

 Gnathopods 1 and 2 simple in o , in d gnatbopod 2 subclielate. Peraeo- 

 pods 1 — 5 subequal, 2'^ Joint but little expanded. Pleopods, rami few-jointed. 

 Uropod 3, rarai lanceolate. Telson entire. 



Marine. 



1 genus, 3 species. 



]. Gen. Colomastix Grube 



1861 Colomastix (Sp. im.: C.pusilla), E.Grube, Ansfl. Triest, p. 137 | 1888 C, 

 T. Stebbing in: Rep. A^oy. Challenger, i". 29 p. 329 | 1893 C, J. Bonnier in: Bull. sei. 

 France Belgique, r. 24 p. 202 | 1893 C, A. DellaYalle in: F. Fl. Xeapel, r. 20 p. 854 

 1862 Cratippus (Sp. un.: C. tenuipes), Bäte, Cat. Amphip. Brit. Mus., p. 275 | 18»V.» 

 Exunguia (Sp. un. : E. sfiüpes), (A. 31. Norman in:) G. S. Brady & D. Robertson in: 

 Ann. nat. Hist., ser. 4 r. 3 p. 359. 



"W'itti the characters of the family. 



3 species. 



Synopsis of species: 



j Uropod 3, i-ami very unequal 1. C. brazieri . p. 206 



\ Uropod 3, rami subequal — 2. 



f Gnathopod 1, 3<i Joint ratlier elongate 2. C.pusilla . . p. 2n7 



\ Gnathopod 1, 3*1 Joint not elongate 3. C. hamifera . j). 207 



1. C. brazieri Hasw. 1880 C b., Haswell in: P. Linn. Sog. N.S.Wales, r. 4 

 p.341 t.22 f.4| 1893 C. pnsilla (part.), A. Della Yalle in: F. Fl. Neapel, r. 20 p.851. 



Eyes round, rather prominent. Antennae 1 and 2 subequal, spinöse, 

 peduncle slightly compressed; antenna 1, P* Joint stouter and rather longer 

 than 2"^, not as long as 2*^ and 3"^ combined, flagellum shorter than 3** Joint 

 of peduncle, 4- (Haswell) or (?)3TJointed. Antenna 2, 3*^ Joint stout, as long 

 as ultimate Joint of peduncle, penultimate rather longer, flagellum with 1 distinct 

 Joint, perhaps followed by 1 or 2 minute terminal joints. Epistome very acute, 

 maxillipeds and probably other mouth-parts as in C. pusilla. Gnathopod 1, 2*^ Joint 

 membranous, slightly widened, 3*^ rather long. 4**^ a little longer, 5*^ and 

 6**1 linear, 6^^ much longer than 6*^, tlie latter tipped with fascicle of spines, oue 

 of which may be the finger. Gnathopod 2 more robust, 3^* and 4*^ joints not 

 elongate, 5*^ cup-like, rather broad, much shorter than 6^^, very spinöse. 

 6*^ in 5 elongate oval, apically naiTowed, bind margin spinöse, palm short, 



