40 



9. Eudorellopsis deformis, (Kr0yer). 



(PI. XXXI, XXXII.) 

 Leucon deformis, Kreyer, Nat. Tidsskr. Vol. 2 (2nd series) p. 194, pi. 4. 



Syn: Eudorella deformis, G. 0. Sars. 



Specific Characters Body of female exceedingly short and stout, with the 

 anterior division rather dilated, and considerably longer than the posterior. Cara- 

 pace comparatively large and deep, exceeding in length the exposed part of the 

 trunk, and transversely truncated in front, tips of the lateral lappets appearing 

 above as 2 juxtaposed horn-like projections, in front of which the rather wide 

 efferent branchial orifice occurs; anterior edges of carapace perfectly straight, 

 without any sinus, but fringed throughout their whole length with broad lamellar 

 teeth; antero-lateral corners triangularly produced. Adult male somewhat more 

 slender than the female, and exhibiting the usual sexual characters, carapace dif- 

 fering in the circumstance that the anterior edges are dentate only in the middle, and 

 the antero-lateral corners not produced. Superior antenna with the last peduncular 

 joint longer than the 2nd, both armed at the end with a circlet of strong spines, 

 outer flagellum about the length of the last peduncular joint, inner much smaller, 

 scale-like, with 3 short apical spines. Palp of anterior maxillae with a small cili- 

 ated projection at the base outside. Branchial apparatus with only 2 digitiform 

 gill-elements on each side. 1st pair of legs moderately slender, with a row of 

 long plumose setge outside the meral and carpal joints, propodal joint about the 

 length of the carpal one, terminal joint somewhat shorter and very narrow, subli- 

 near, carrying on the tip 3 slender spines and 2 unequal bristles; 2nd pair with 

 the last joint fully as long as the antepenultimate one, and provided with 5 api- 

 cal, and 2 lateral spines. Uropoda in female very strongly built, with the basal 

 part short and thick, and the rami very unequal, the outer one being much the 

 larger, with the distal joint rather expanded and obliquely truncated at the tip, 

 which carries about 7 ciliated setse, the dorsal face of the joint being, moreover, 

 armed with several rows of strong spines; inner ramus conically tapered, with 

 scattered spinules inside, and carrying on the tip of the comparatively small dis- 

 tal joint, a short spine and a slender seta. Uropoda in male less robust, with 

 the inner ramus more produced and, like the basal part, provided with ciliated 

 seta? in addition to the spinules; outer ramus with the distal joint narrower 

 and less spinous. Colour whitish. Length of adult female 5 mm., of male 

 4 ! /2 mm. 



