KCHI.NUIDKA. I. icy 



complicate (PI. X\'I. Fig. i6), and the iiiino.st ones .show a radiate arrangement. There are no .spines 

 on the bnccal plates; a few pedicellariae may be found on the buccal membrane, especially opposite 

 to the gills. 



The pedicellarise. The globiferous pedicellarise (PI. XVIII. Figs. 6, 24) have one lateral tooth 

 on either side, sometimes two teeth on one side, one tooth on the other; the blade is almost tubular, 

 the edges being coalesced to such a degree, that only a series of small holes are left in tlie median 

 line, and one larger hole just below the large end-tooth. The basal part is \ery varying in form, 

 with more or less projecting outer corners or with quite rounded edge. The apophy.sis is narrow and 

 often rather irregular in the edge with a larger, oblong or rhombic hole at the upper end. The size 

 differs very much ; especially in van Flemingii quite small pedicellaria; may be found. In var. iior- 

 vegicus numerous spicules are generally found in the stalk and head of the globiferous pedicellarise 

 (also in the neck of the other pedicellarise). The tridentate pedicellariEC (PI. X\'III. F'igs. i, 5, 7). The 

 valves long, narrow, and deep; the upper end of the apophysis spreads somewhat, and forms a little 

 mesh-work in the lower end of the blade; a few narrow cross-beams cross the inside of the l^lade for 

 a .shorter or longer wa}-. The edge is straight, thick, and set with numerous small teeth, placed in 

 transverse series (PI. XXI. F"ig. 25); in the .short part at the point where the valves join, the edge is 

 more or less coarsely serrate. They may be very long, up to 2-5""" (the length of the head). The 

 ophicephalous pedicellarise (PI. XIX. Fig. 36) as well as the triphyllous ones without any characteristic 

 peculiarities. — The sphseridise (PL XIX. Fig. 32) rather much grooved at the point. — The .spicules 

 (PI. XVIII. Fig. 14) of the common form, numerous, especialh- in the abactinal tube feet; they are also 

 found in rather great numbers in the .skin round the base of the spines, and even some way out on 

 the .spines, in the gills, and in the buccal membrane : in the gills together with the conunon irregular 

 fenestrated plates. Also in the pedicellarise they may be found, especially in var. i/orvrgicns. Some- 

 times a few S-shaped spicules may be found among the common bihamate ones. 



Synonymous with this species are Echijiiis ran'spiims G. O. Sars, depresses G. O. Sars, and 

 microstoma Wyv. Thomson. The two former have already in Rev. of Ech. by Agassiz correctly 

 been referred to Eck. iiorvcgiciis. Of Ecli. rarispii/iis Danielssen (no. p. 4) says that if it be no 

 distinct species it is at all events a well-marked variety that seems to work its way up to an inde- 

 pendent species . By the kindness of Prof. Collett I have from the museiim of Christiania got some 

 typical specimens of Eck. rarispimis for examination; I can see no other thing but that they are large 

 specimens of var. norvcgicits. PI. II. Fig. 2 may o far be taken as an Ech. rarispimis > , but there is 

 no reason to keep up this form as a special variety. Neither can I feel quite persuaded that the 

 small specimens with the characteristic red spots (PL II. Fig. 6) ma\' be said to be representatives of 

 :<a dwarfish variety degenerated by its confined life in the fjords> (Danielssen loc. cit.), as it is a fact 

 that it is not confined to the fjords, but is also found in the midst of the Cattegat and Skager Rack; 

 also from the Mediterranean and from the Bay of Biscav I have seen quite t\-pical specimens. They 

 are scarcely anything else than young specimens of Ec/i. aczihis. It is, however, to be observed that 

 such small specimens of a diameter of ca. 1/2" may be sexually ripe, as pointed out by G. O. Sars'), 

 and as I have also siibstantiated on specimens from the Cattegat. We have no proof that these small, 



M Forhandl. i Vidensk. Selsk. Christiania. 1S72. p. 106. 



