146 



ECHINOIDEA. II. 



Agassiz (Rev. of Ech. PI. XXV. 27 — 28). Globiferous, rostrate, tridentate and tripbyllous pedicellariae 

 have been found; ophicephalous ones do not seem to occur. 



The globiferous pedicellariae (PL XVII. Figs. 37, 49) are very conspicuous, with a thick, brownisli 

 head; the valves are very short, with a very large basal part and a short, tubeshaped blade, which 

 has 5—6 teeth along each side of the elongate terminal opening and often an outer median one. The 

 stalk has a whorl of free projecting rods at its lower end; the upper end is attenuated. These pedi- 

 cellariae I have found only on the actinal side, and only in specimens from the ]\Iediterraneau, never 

 in any specimen from the northern seas. In some specimens from Tamaris (Var), which Professor 

 Koehler has most kindly lent me for examination I find them thus represented: in one specimen 

 (the largest) they are very numerous and well developed; in four specimens there are very few of 

 them, at the mouth or on the anal area, and they are small, the basal part being not very large and 

 the whorl on the stalk little developed; in two sjDecimens I find no globiferous pedicellariae at all — 



» 



r,\ 



^ 



Fig. 24, a—c. Anal and subaual region of Echinocaydium cordatiun: a speci- 

 men from Skagerrak; b from Roscoff; c from Naples. 



in these latter specimens, on the other hand, the tridentate pedicellariae seem comparativeh- more 

 richly developed than usually. 



The rostrate pedicellariae (PI. XVII. Figs. 15, 21, 38) are rather like those of flavescens, only 

 still more like tridentate pedicellariae; the blade generally is somewhat pointed, and may have a pro- 

 minent tooth in the point. In some specimens from the Mediterranean I find such with the blade 

 much narrower (PI. XVII. F'ig. 34), recalling very much those of Spaiaiigns. — The tridentate pedi- 

 cellariae (PI. XVII. Figs. 22, 23, 30, 43, 48) have leafshaped valves, in the smaller ones joining with their 

 whole edge; in the larger forms the blade is more or less narrowed in the lower part, the edge being 

 irregularly serrate; there is generally some mesh work in the bottom of tb.e blade in these larger pedi- 

 cellaricC. In the specimens from Tamaris I find the tridentate pedicellariae unu.sually broad (PL X\'ir 

 Fig. 30). The largest ones seen were ca. 1-5""", length of head. — The triplnllous pedicellariae (PL X\'I. 

 Fig. 21) are very peculiar; in the outer part there is a series of broad teeth inside along the edge; the 

 .serrations pass a little way up together with these teeth. In about the outer half of the l)ladc the edge 

 is smooth. — Ophicephalous pedicellariae unknown. 



This species, which was not taken by the Ingolf>, is very common in the Danish Seas, and 

 along the Atlantic coasts of Europe, from Northern Norway to the ^Mediterranean. It is not known 

 {rem the Faroe-Islands or Iceland. From the American side of the Atlantic it is recorded from 



