51(5 '^- Stkphensen. 



Parapasiphaësulcatifrons, Kemp 1908 ( 1910)p. 49—54, PL 5, figs. 3—21. 



Gennadas elegans, Monlicelli et Lo Bianco : Sullo sviluppi dei 

 Peneidei del Golfo di Napoli; Monit. Zool. Ital., anno XI, (suppl.) Roma 

 1900, p. 20 — 28 (teste Bouvier, Res. Camp. Sc. Monaco, vol 33, Penéidés, 

 1908, p. 35 ; the paper named is not in Copenhagen, and I have not 

 seen it myself). 



Sergestes arcticus, Wasserloos, Metam. von Serg. arct., Zool.- 

 Anzeiger, vol 33, No. 10, 1908, p. 303, 10 ligs. 



The imperfection of the material is shown for example by 

 some legs being absent, and it is often clear, that the number of the 

 setæ cannot be given exactly as some of them are broken off. 

 For this reason the following descriptions state nothing as a rule 

 regarding the number of setæ, but reference may be made to 

 the figures. 



A. Early stage of Spirontocaris (groenlandica Fabr. ?) (PI. XXXIX). 



St. 35. Danmarks Havn. 5 — 8 fm. 11 — 10 — 1906. Laminaria and 

 Delesseria region. 1 spec, total length 10 mm. 



Carapace almost cylindrical, very nearly l/3rd of the total 

 length. Rostrum about 1 4th as long as the dorsal line of the 

 carapace without rostrum ; over the base of the rostrum 2 small 

 teeth behind one another. On each side of the anterior margin of 

 the carapace 3 spines: 1 above and 1 below the eye, 1 at the lower- 

 most corner. 1st and 2nd abdominal segments almost equally long; 

 3rd segment in the dorsal line almost as long as the 1st and 2nd 

 segment together; 4th and 5th segments somewhat shorter. On the 

 first 5 abdominal segments the epimeral plates somewhat pointed, espe- 

 cially on the 4th and 5th segments. 6th segment a little shorter 

 than the 2 preceding together, almost cylindrical, with a small tooth 

 on each side of the root of the telson. Telson (fig. 10) of the same 

 length as the 6th segment, almost 2V2 times as long as broad, with 

 almost parallel, but slightly convex sides. Close to the posterior 

 corners on each side there is a small spine. The hind margin 

 almost straight, willi 5 or 6 pairs of spines (unfortunately this part 

 is defective). On each corner there seem to be 2 small spines on 

 the outside, and inside these a somewhat larger spine. Then comes 

 a slightly concave part without spines, and nearest the middle line 

 2 or 3 pairs of spines, probably of equal length. Between the 2nd 

 and 3rd spine from the middle line there is a fine bristle. 



The eyes (fig. 2) pyriform, fairly large; the facetted portion takes 

 up, in length, almost L3rd of the whole length of the eye. 



