ECHINOIDEA. II. 153 



Ho vie: Revised List Brit. Eehinoidea. p. 422. — Bell: Echinoidea of South Africa, p. 175. — Grieg: 

 Nordlige Norges Echinodermer. p. 34. — Doderlein: Arktische Seeigel. Fauna Arctica. IV. p. 384. 

 Echinoiden d. deutschen Tiefsee-Exped. p. 256. Taf. XXXIV. 4— 8. XLIX. 1— 2. 



Non: A. Agassiz: Preliminary Rep. Echini &: Starfishes dredged in deep water between Cuba 

 and the Florida Reef by L. F. de Pourtales. I. Catalogue of the Echini, p. 275, 294. Bull. Mus. Comp. 

 Zool. 1869. Blake -Echinoidea. p. 69. PI. XXVI. 7— 18. — Verrill (418). p. 139. 



Other less important literary references are found in Revision of Echini », Ludwig: Echino- 

 dermen d. Mittelmeeres and Bell's Catalogue. 



As appears from the numerous literary references this species has been mentioned and figured 

 very often. Nevertheless, something still remains to be done. - - Regarding the structure of the test 

 I may only point out that the hinder prolongation of the labrum is narrow and reaches only to the 

 middle of the first adjoining ambulacral plates. (In one specimen, however, I have found it to reach 

 the second ambulacral plates, and in a few specimens to the second ambulacral plate on one side only). 

 The first plate which reaches within the subanal fasciole is, as is usually the case among the Prymno- 

 desmic Spatangoids, the 6th, and only three pairs of pores are found inside the fasciole. These features 

 are of importance for the comparison with the species described below. 



The pedicellarise were first mentioned by Koehler (Op. tit), who finds three kinds of them, 

 which do not, however, present -aucun caractere saillaut, qui permette d'en faire une description 

 speciale (Op. tit). I cannot agree with Koehler herein; on the contrary I find the pedicellarise of 

 the Brissofisis-species, especially the globiferous ones, very characteristic and of great importance for 

 distinguishing the different species. Quite recently Professor Doderlein (Echinoiden d. deutschen 

 Tiefsee-Exped.) has described and figured the pedicellarise of the form of Br. lyrifcra which occurs at 

 the Cape of Good Hope. Though his figures are, most of them at least, very good, I think it will 

 not be found to be superfluous, when I give some figures of the pedicellarise of this species also - 

 — partly because the Cape-specimens of Br. lyrifcra ought, in my opinion, at least to be regarded as 

 a distinct variety, and partly because these figures are wanted for the comparison with those of the 

 new species here separated from lyrifcra. Several details will also be found more clearly represented 

 than in the photographic figures given by Doderlein. — For the rest both descriptions and figures 

 were prepared a long time before Doderlein 's work had appeared. — I have found the same four 

 kinds of pedicellarise as found by Doderlein, ophicephalous pedicellarise not having been found by 

 either of us. 



The globiferous pedicellarise (PI. XVII I. Figs. 1, 6, 25, 26) are rather conspicuous. The thick skin 

 that invests the valves is probably of a glandular nature; in the living animal it is of a vivid yellow 

 colour. The blade is a narrow tube with a small opening at the point, bordered by two long teeth. 

 The basal part is rather wide, somewhat variable in form. At the lower end of the stalk there is a 

 whorl of rather long, projecting thorns, but apparently never on more than half the circumference of 

 the stalk. Not always a distinct thickening at the upper end of the stalk. This kind of pedicellarise 

 I have found on almost all the specimens examined from the Mediterranean; on those from the 

 Danish Seas it is not so common. They are generally found on the abactinal side between the fasciole 



The Ingolf-Expedition. IV. 2. 2 ° 



