Il6 ECHINOIDEA. II. 



the Berlin Museum aiid the speciniens of the sChallengers (St. 142), I must fully join Professor 

 Doderlein lierein. As poiuted out by Doderlein this species recalls Sch. pJiilippii very much by 

 the shape of the test; there is no distinct abactinal crest formed by the posterior interambulacrum, 

 the test slopes gently towards the posterior end. The posterior petals are a little shorter than in 

 PJiilippii, but above all it is very easily distinguished from that species by its globiferous pedicellariæ, 

 which are like those oi /ragilis with a single, large endtooth. On the other hånd it differs horn fragilis 

 in the broad shape of the tridentate pedicellariæ, besides by the shape of the test. It may be expressly 

 stated that I have found the pedicellariæ of both the type specimen of S. capfiisis and of the «Chal- 

 lenger*-specimen quite like those figured by Doderlein (Op. cit. PI. L. Fig. 3). (PI. XIV. Figs. 33, 48) 

 In the former I have further found a short and broad pedicellaria (PI. XIV. Fig. 42) which may per- 

 haps represent the rostrate pedicellariæ, which have otherwise not been found in this species. Ophice- 

 phalous pedicellariæ have not been found either, and as in S. /ragilis they will jsrobably be found 

 only in quite small .speciniens. 



I have further seen in the Briti.sh Museum two speciniens, labelled Sch. /ragilis, from the Cape 

 of Good Hope Government, (No. 29), evidently the speciniens mentioned by Professor Bell (Op. cit), 

 wlio States on account of them that the species attains a much greater size here than in the Northern 

 waters. They are, however, certainly not Sc/i. /ragilis, but belong to the canali/erus-growp, and pro- 

 bably represent a new species. The shape of the test is as in Sc/i. cavali/erus, and the pores of the 

 frontal ambulacrum are arranged in double series as in that species. I have found only rostrate pedi- 

 cellariæ, both speciniens being alniost naked; they differ considerably from those of canali/erus, being 

 much less elongated and with quite smooth edges; the blade is curved in the usual way, a little 

 widened at the point, which is closely serrate (with ca. 16 teetli); the basal part is ratlier narrow 

 (PI. XIV. Fig. 30, conip. with PI. XIV. Fig. 26 which represents the corresponding form of pedicellariæ 

 from Sch. canali/erus). The spicules (PI. XIV. Fig. 38. a— c) likewise differ very considerably from those 

 of canali/erus ; they are of two kinds: small, rounded, fenestrate piates, and nunierous simple rods of 

 the usual form, arranged in 3 — 4 longitudinal rows, the fenestrate piates occurring niainly between 

 these series. The rosette-plates as in canaUferus. — By the double row of pores in the anterior ambu- 

 lacrum this form agrees with Sch. canali/erus and Savignyi alone. It is probably a new species; how- 

 ever, so long as S. Savignyi and the var. major Fourtaui are not sufficiently knowii as regards their 

 pedicellariæ, I think it preferable not to establish it definitely as a new species — the more so, as it 

 is itself insufficiently known as regards the pedicellariæ. 



Of the rather numerous recent species of Schizaster hitherto described tliree more belong to 

 the Atlantic (and the Mediterranean), viz. Scli. canal/crus (Lmk.), orbiguyauus A. Ag. and Edwardsi 

 Cotteau. I may take the occasion to give here some additional information of these species, which 

 may not prove superfluous. Scliizaster canali/erus is so well known and well described, especially by 

 Agassiz and Koehler, that I have only very little to add. It may be worth noticing that there are 

 found 5 — 6 large tubefeet 011 eacli side along the anal area, the first of these j^laced in the 5th ambu- 

 lacral plate; the subanal fasciole passes over the I2th ambulacral plate. (In S. /ragilis there are 4 — 5 



■ R. Fourtau: Contribution å 1' etude des Échinides vivant dans le Golfe de Suez. BuU. Inst. Égyptien. 4, Sér. 

 Vol. IV. 1904. 



