studios on inariiie Ostracods 9^. 



about lialf the. length of this one or somewhat shorter; all are pectinated distally, the two shorter 

 ones rather weakly, however. The cutting part of the posterior distal edge of this joint is of 

 about the same type as in the previous species. The end joint is rather strongly chitinized, 

 but not so strongly as in the preceding species, nor does it form an inner tooth - like, powerfully 

 chitinized process as in the case of the species mentioned. It is furnished with exactly the same 

 bristles as in the preceding species; most of these bristles are, however, developed quite differently 

 from those of the latter: Four a-bristles of the same size and strength as these bristles in C. (D.) 

 levis; the posterior ones of these are weakly and sparsely pectinated in the middle, the anterior 

 ones are bare or have a few fine, short secondary spines. Three b-bristles, of which the anterior 

 one is moderately long, the two others about half the length of this one, all strongly pectinated, 

 the two short ones, however, having rather few secondary spines. Three c-bristles, of which 

 the posterior one has about the same type and size as the anterior b-bristle or else is somewhat 

 shorter, the middle one agrees fairly well with the two short b-bristles and the anterior one is 

 very short, bare or only having sparse, short, fine secondary spines. Three d-bristles, rather 

 long, subequal, powerful like these bristles in C. (D.) levis, but only weakly and uniformly curved 

 and very strongly pectinated (from which character the species derives its name) ; on the posterior 

 one of these bristles the secondary spines are more numerous than on the anterior ones. 

 Pilosity: The first endopodite joint has transverse rows of fine and rather short hairs. 



Fifth limb: — ■ Protopodite: The first endite (fig. 3) is furnished with eight 

 bristles, of about the same type, powerful masticatory bristles armed with long, stiff secon- 

 dary bristles situated close together and more or less clearly arranged in obliquely placed wreaths. 

 On all the specimens investigated, five in number, from Falkland Islands and T i e r r a 

 del Fuego, the proportion between these bristles was about the same: Bristles nos. 3, 5, 

 7 and 8, counting from the anterior side of the limb, were rather long, decreasing somewhat 

 in length the more posteriorly they were placed; nos. 2, 4 and 6 form a similar series, but are 

 considerably shorter; no. 1 is very small. The five inner bristles of the second endite (fig. 4) 

 are powerful, subequal, and of moderate length. The two anterior ones and the two posterior 

 ones are of about the same type, the latter being, however, somewhat more powerful; distally 

 they are furnished with powerful secondary teeth and in the middle with some obliquely situated 

 wreaths of long, stiff secondary bristles. The middle bristle is finely serrated distally and has 

 one or a few wreaths of long, stiff secondary bristles at the middle. The remaining bristle of 

 this process, situated on the anterior side at some distance from the five former ones, is short 

 and almost bare, with only a few long, stiff secondary bristles. The seven bristles of the third 

 endite are moderately long (fig. 5), subequal except for bristles nos. 5 and 6, counting from the 

 anterior side of the limb, which are somewhat shorter, no. 6 being rather shorter than no. 5. 

 They are all powerful, especially no. 7; bristles nos. 1, 2, 4 and 7 have at the middle long, 

 stiff secondary bristles arranged in a wreath, the others are, in most cases, without such armament. 

 Bristle no. 1 has short hairs, nos. 2 and 4 have rather powerful secondary teeth, nos. 3 and 5 are 

 finely and sharply serrated distally, nos. 6 and 7 have very powerful secondary teeth distally. 

 The distal chitinous spine of the protopodite is relatively somewhat shorter than in the preceding 

 species. The epipodial plate has the same number and type of bristles as in the 



Zoolon. bidriii;, Uppsnlii. Sii|iiil.-Bil. I. •" 



