Raja nidrosiensis, 



en ny Rokke fra Throndhjeinsfjorden. 



Af 



Robert Collett. 



(Foredraget i Mødet den 3die Mai 1881). 

 Hertil 1 Pl. 



Raja nidrosiensis, n. sp. 



Diagu. Snout long and graduaUy pointed; the width of the 

 interorbital space is contained ab out four times and one half in 

 the length of the snout. Body above smooth, rough only on the 

 snout and the upper margin of the cye, in some old specimens also 

 along the front margin of the disk; the body bclow thiekly covered 

 irith minute asper Hies. No largcr spines on the disk. The tatl in the 

 males with a median series (containing about 40 spines), hut none 



P 



on ilic sides; the old femalcs with three series, the median series 

 containing a varying numher of spines, some of ivhich are some- 

 times irrcgularly croivdrd fogethrr. Betwccn the dorsals are as a 

 rule a fr w spines. 



The tecth forming 41 — 44 series in the upper, and 41 — 43 in 

 the lower jaiv. Coloration dark grcyish hroirn above; the tnucous 

 pores marked with black vermieular spots. IjOteer surface blackish 

 witkout spots. 



Hab. Throndhjemsfjord, Norway. 



Vid.-Selak. Forh. 1881. No. 7. 1 



