Colomastix 207 



ill-defiued, overlapped by sniall slender fiiiger, in ö broadly oval, narrowed 

 at the oblique obsciirely bidentate palni, finger rather stout, not overlapping 

 palm. Peraeopods 1 — 5 moderately robust, 4*^ Joint a little widened. 

 Brancliial vesicles narrow, marsupial plates very long- and broad. Uropods 1 

 and 2, peduncle subequal to rami, rami nearly equal, longer in uropod 1 than in 

 uropod 2; uropod 3, peduncle shorter tban telson, inner ramus long narrowly 

 lanceolate, reaching mucb beyond tbose of uropods 1 and 2, outer very short, 

 spine-like. Telson conical, corapressed, almost acute at apex. Colour ligbt 

 green. L. about 10 mm. 



Port Jackson [East-Australia]. Depth 4 18 m. 



2. C. pusilla Grube 18H1 C. p., E. Grabe, Ausfl. Triest, p. 137 | 1864 C. />., 

 E. Grubo in: Arch. Xaturg., v.tiOi p. 206 t. 5 f. 2, 2 a— b| 1888 C. p., T. Stebbing in: 

 Kop. Voy. (Jhallcuger, u 29 p.329 | 1893 Cj)-, J. Bonnier in: Bull. sei. France Belgiquc, 

 r..24 p.203 t. 8 ] 1893 C. p. (part.), A. DellaVallc in: F. Fl. Xeapel, r. 20 p. 854 t. 6 

 f. 2; t. 61 f. 23 — 37 | 1862 Cratippus teniiipes, Bäte, Cat. Amphip. Brit. Jlus., p. 276 

 t.46 f. 10 I 1876 C. t., T. Stebbing in: Ann. nat. Hist., scr.4 r.l8 p.447 t.20 f. 4. 4a- c | 

 1866 C. crassimanus -\- C. pusillus, Cara. Heller in: Denk. Ak. Wien, n 26ii |). 50; 

 t. 4 f. 12, 13 I 1869 Extinguia stilipes, (A. M. Norman in:) G. S. Brady & D. Robertson 

 in : Ann. nat. Hist., ser. 4 t;. 3 p! 359 t. 22 f. 7-12. 



Head, lateral corners rounded. Pleon segments 1 — 3, lateral angles rounded. 

 Eyes small, round, red, tbe lenses outlined witb wliite. Antenna 1 longer and 

 much stouter than antenna 2, l'^* Joint not as long as 2^ and 3* combined, 

 flagellum of 1 sbort and 2 minute joints. Antenna 2, penultimate Joint rather 

 longer than the stout antepenultimate or narrower ultimate, all serrulate, flagelhim 

 as in antenna 1. Epistome subacute. Lower lip apically broad, prominent 

 at centre. Maxilla 1, outer plate small on large base, armed with 2 or 

 3 spinules, the short 1-jointed palp carrying 4 slender spines. Maxillipeds, 

 inner plates forming one piece, simply conical or blunt, outer plates feebly armed, 

 reaching middle of 2'^ Joint of palp, of which 3^ is rather louger than 2^^, finger 

 obtuse, setulose, Gnathopod 1, 2'^ Joint widened distally, 4*^ rather longer than 3**, 

 5*^ and 6*^ subequal, finger spine-like, distinguished from the group of 

 spines about it by the attached tendou; gnathopod 1 atrophied in d (Della 

 Valle). Gnathopod 2, 3'^ and 4*^ joints short, 5**^ and 6*^^ in o subequal in 

 length, spinöse, 6*'^ rather tapering, palm ill-defined, finger moderately 

 strong, in ö b^^ short, cup-like, 6^^ greatly eularged, palm divided into 

 3 large blunt processes, finger robust (Heller's C. a'assimanus). Peraeo- 

 pods 1 — 5 subequal, not veiy robust, 2^^ Joint little dilated. Branchial 

 vesicles naiTow, Uropods 1 — 3, rami broad, lanceolate, slightly serrulate, 

 3*1 shortest, in all rami subequal. Telson suboval, entire, longer than broad 

 (Della Valle), or distally widened with apical border slightly concave, broader 

 tban long (Bonnier). Colour ivory white with pale dorsal markings, or 

 greyish, dorsally tinted with ochre. L. 4— 5 mm. 



Mediterranean, North- Atlantic (France, Great Britain). 



3. C. hamifera Kossm. 1880 C. hamifcr, Kossmann, Reise Roth. Meer., r. 2i 

 3Ialacost. p. 136 t.l5 f. 1—10 | 1893 C. pusilla (part), A. Della Valle in: F. Fl. Neapel. 

 V. 20 p. 854. 



Like C. pusilla (p. 207) (of which it is perhaps a young d) except in 

 the following respects. Antenna 1 rather more slender than the equally long 

 antenna 2. Gnathopod 1, 3'^ Joint short. Gnathopod 2, 5*^ Joint as broad as 



