KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 59. N:0 4. 2!) 



C in two rows XIX-XXXV, 19-29 (at the inner row) 22—32 (at the inte- 

 riör) about 12 mm. The outer segments provided with two groups of processes: a 

 posterior transverse lath (B) and an anterior (more distal) spiny row (A). The poste- 

 rior lath straight and even at the proximal börder of the segment. The anterior at 

 the distal part of the segment somewhat curved and with irregular protuberances 

 at the margin, on the distal segments these are prolonged to two blunt lateral spines. 

 The posterior crista usually appears somewhat before the anterior one (thus not quite 

 agreeing with Clark's figure at op. cit. 42, fig. 353). Outgrown C, usually with B 

 appearing about the o th , A at 8—13 segment. 



First segment short. The four following ones broader than they are long, then 

 rather square or a little longer than they are broad. The penultimate segment 

 shorter again, with opposing spine, which occupies only a part of the dorsal surface 

 of the segment, attaining l {a of the breadth of the segment. The posterior lath often 

 still remaining. Terminal claw coarse, strongly curved, about as long as the penulti- 

 mate segment. The distal borders of the segments on their ventral side bent a little 

 outwards, which gives the C:i a somewhat uneven margin. 



Dorsal prominences are first developed at proximal segments, last of all at the 

 distal ones. First B appears, then A. 



Arms 10, 50—70 mm. 



The R:s visible as narrow ribbons or only projecting in the corners. The 

 median part with one or more distinct knöts. Similar often on the proximal part 

 of IBrl. 



I Br-.s 1 with the breadth 3 times the length, basal halves grown together 

 inside. Form with I Br:s 2 a medio-dorsal joint prominence. These swellings sepa- 

 rated from the remaining part of the ossicles by shallow grooves. The axillan T forms 

 a distal angle, which is r less than 90°. — Br:s 1 inside united basally, form with 

 Br:s 2 median dorsal swellings. I Br 1— Br 2 with lateral laths encircling a narrow 

 U-shaped gap between the arms. First syzygy as usually between Br3 and 4. 

 Second appears from about the 8* h to the ll th segment, then with an interval of 5 

 segments as, for instance, 9+10. . . 14 + 15. . . 19 + 20 etc. — Br:s 4 to 9 with pro- 

 nounced, swollen distal borders. The prominence on Br 4 most strongly developed 

 inside, thus a prominence directed backwards alternating on the outside and inside 

 of the arm. In addition on these segments proximally developed knöts often form 

 an indistinct, median ridge. After the 2 d syzygy the segments grow smoother and 

 are wedge-shaped. 



P x 13 — 20, 10—15 mm (on Br 2). First segment rather square, second half 

 again as long as broad. Third, fourth and fifth segments more than tvvice as long 

 as they are broad. The segments then shorter again, always, however, a little longer 

 than broad. The P smooth, strongly compressed laterally like the following ones, 

 directed stiffly upwards. P 2 13—19, 9 — 14 mm, with the same appearance as Pj 

 (4ti» segment the longest); P 3 13—17, 7—12,5 mm; P 4 13—22, 6—10,5 mm (the seg- 

 ments shorter, the length never more than 1 '/■* of the breadth); P-, -— P 7 similar but 

 with the segments still shorter and increasing in number; P K , 24, 7 mm. Distal pinnules 



