58 ME. T. SCOTT ON ENTOMOSTEACA 



EucHiETA ATJSTRALis, Brady, (PI. VI. fig. 23.) 



1883. Euchceta australis, Brady, Report Chall. Copep. p. 65, pi. xxi. figs. 5-11. 

 A single specimen of this species (a male) was obtained in a tow-net gatliering from 

 50 fatlioms at Station 2 (lat. 7° 54' N., long. 17° 25' W.). Collected between 7.20 and 

 8.20 p.m., January 1st. I have nothing to add to the description of this apparently rare 

 species contained in the Report on the Copepoda of the ' Challenger ' Expedition, 

 The species, after being dissected, was easily recognized by the description and figures of 

 it in that Report. 



EucH^TA GiCAS, Brady. 



1883. Euchata gigas, Brady, loc. cit. p. 65, pi. xxii. figs. 1-5. 



This Euchceta was obtained in a tow-net gathering from a depth of 35 fathoms in 

 lat. 1° 55' 5" N., long. 5° 55' 5" E. Collected during the day, January 22nd. Two or at 

 most three specimens (females) were obtained. 



EucH^TA BARBATA, Brady. (PI. VI. fig. 17.) 



1883. Euchceta barbata, Brady, loc. cit. p. 66, pi. xxii. figs. 6-12. 



This 'Eucliceta was obtained in three different tow-net gatherings, in one from 50 

 fathoms at Station 2, January 1st, in one from 360 fathoms in lat. 1° 55" 5' N,, long. 

 5° 55' 5" E., January 22 nd, and in one from 30 fathoms, at Station 23, Eebruary 4-th. 



This remarkable species is readily distinguished from other EuclicetcB by the tufts of 

 setae on the last abdominal segment, by the first abdominal segment being greatly dilated 

 ventrally, and by the tufts of seta3 on the posterior angles of the last thoracic segment. 

 Very few specimens (females) were obtained. 



ErCHiETA (?) Hessei, Brady, var. similis, nov. var. (PL VI. figs. 24 & 25.) 

 1883. Euchmta Hessei, Brady, loc. cit. p. 63, pi. xx. figs. 1-13, pi. xxiii. figs. 11-14. 

 Male. Length 2"2 mm. (l-12th of an inch). Body elongate, rounded in front; the 

 postero-lateral angles of the last thoracic segment are produced in aculeate spines, as 

 shown in fig. 1. Anterior antennae as long as the thorax, 21-jointed, geniculate at the 

 twelfth joint ; the eighth and twelfth joints are composed of two or three coalesced 

 joints and are indistinctly articulated ; the basal joints are furnished with leaf -like appen- 

 dages, and a club-shaped filament springs from the end of the last joint. The annexed 

 formula shows the proportional lengths of the joints : — 



10. 3. 3. 3. 3. 3. 3. 8. 3. 3. 4. 4. 5.6. 6. 6. 9. 14. 8. 8. 8 

 1 2 3 4 5 G 7 8 y 10 11 12 13 14 15 16 17 IS 19 20 21 



Posterior antennae and mouth-organs similar to those of Euchceta marina, but 

 the anterior foot-jaws, though small, are somewhat stout, as shown in fig. 4. Swimming- 

 feet also as in that species, except that tlie terminal spines of the swimming-feet are 

 more coarsely serrate — especially those of the third and fourth pairs, the serrations of 

 which number about eighteen ; the secondary spines of the second pair are longer than 



