11 DE. U. J. UANSEN ON THE 



bent tho maxilliped (aud the maxilla) backwards, but the figures 

 in question (PI. 4. figs. 4 & 5) have been drawn without camera. 

 My figures of the mouth-parts show all the details necessary ibr the 

 purpose : only the basal part of the maxillula has been omitted ; 

 it could not be examined without undertaking a dissection, but 

 fortunately it is of slight or no importance in this connection. 

 I must add that I do not deem it necessary to redescribe every 

 detail, or to draw a complete set of new figures. As to the 

 thorax and abdomen, I refer the reader to the description and 

 figures in Beddard's work, confining myself essentially to some 

 remarks, additional and critical, and figures of two legs. For 

 comparison with tbe Girolaninoe (and AlcironincB), the student is 

 constantly referred to my above-named paper published in 1890. 



Head. — It is proportionately rather short and narrow, but 

 deep : in PI. 4. fig. 1 it is shown obliquely from in front and some- 

 wbat from below; in fig. 2 from below^ and somewhat from behind. 

 On tlie front side it presents a rather deep and exceedingly high 

 transverse groove («), which tapers somewhat towards the middle ' 

 line, where it is interrupted in the upper half by a narrow 

 vertical keel, and in the lower half by the frontal plate. In the 

 groove the antennulse (c) and the antennge {d) are situated. The 

 groove is limited below by a thick transverse wall (e), which at 

 tbe middle txirns upwards, constituting the upper part of the 

 frontal plate ; the lower part of this plate is not marked off 

 laterally from the wall by any suture or impression, while in the 

 Girolanince and Alcironince the plate is always sharply defined 

 on all sides. The clypeus (/) is situated below the wall and 

 marked off from it by a deep, somewhat sinuate transverse 

 impression, without any real suture. 



Antennul(S (PI. 4. fig. 1, c). — These are exceediDgly thick aud 

 moderately short, reaching slightly beyond the lateral margin of 

 the head, and each consisting only of two joints. The basal joint 

 is shorter than thick, and I am inclined to suppose that it is 

 homologous with the two proximal joints of the peduncle in many 

 Cirolanince; the distal joint would then correspond with the third 

 joint of the peduncle and the flagellum together — but I cannot 

 prove tbe correctness of this supposition. 



Antennce(P\. 4. fig. 1, d). — These consist, according to Beddard, 

 of a four-jointed peduncle and a nine-jointed flagellum. In the 

 specimen the peduncle has been preserved ; it is considerably 



