99 



In the collection of Echini from the Hamburg Museum I found a small 

 specimen of a Microcyphiis (from Tor, on the coast of Sinai; Dr. Hartmeyer, 1901) 

 which is distinguished from the typical M. maculatus by its redbrown, ringed 

 spines (with 2—4 narrow light bands) and its redbrown test. Also the ophicepha- 

 lous pedicellariæ are reddish. Otherwise it agrees with maculatus. Probably this 

 form will prove to be a distinct variety of maculatus or perhaps a separate 

 species. As, however, it may possibly prove identical with M. Rousseaui, I shall 

 not propose any name for it, but be content with drawing attention to Ihis form. 



Microcyphus zigzag Agass. The globiferous pedicellariæ are very small and 

 have mostly a large lateral tooth; rather often, however, this lateral tooth is not 

 developed or quite rudimentary. The blade is flat, not in the usual form of a 

 closed tube; upon the whole they are like those figured of the new species M. anmi- 

 latus, to which figures reference may be made (PI. VI. Figs. 29, 31). The valves of 

 the ophicephalous pedicellariæ are short and broad, not narrowed in the middle; 

 they are like those of M. annulatus (PI. VI. Fig. 15). Triphyllous pedicellariæ like 

 those of M. maculatus; tridentate pedicellariæ not found. Rather numerous small 

 bihamate spicules in the tubefeet and sometimes in the globiferous pedicellariæ. 

 The buccal membrane contains no plates besides the usual ring of small plates in 

 the oral edge. A few bihamate spicules may also be found in the buccal membrane; 

 no pedicellariæ on the buccal plates. The spines (PI. II. Figs. 20, 25, 26) end abruptly 

 in a not very long central thorn, mostly without a distinct circle of small thorns 

 at its base. The secondary spines are a little widened at the point, the central 

 thorn being little conspicuous. The primary spines are of a dark red colour, the 

 secondary ones faintly reddish. 



Of this species I found three specimens in the British Museum from Port 

 Philip, named Amblypneustes ovum (see below); they agree exactly with the figures 

 in „Rev. of Ech." PI. VIII. c. 11 — 13; the largest specimen (25 mm. diameter, 23 mm. 

 high) in particular is very like the large specimen figured by Agassiz. Of the two 

 other specimens one is 12 mm. in diameter, 10 mm. high, the other 11 mm. in 

 diameter, 95 mm. high. — Unfortunately the type-specimen in the Paris-Museum 

 has only some ophicephalous pedicellariæ left; they agree with those of M. annu- 

 latus. In his „Notes on the Echinoderms collected at Port Philip by Mr. J. B. 

 Wilson" '). Bell mentions a small specimen of Microcyphus zigzag „of a most 

 beautiful rosy colour". This specimen I have examined; it differs from M. zigzag 

 in several respects. The form of the test is alike, but the tuberculation is a little 

 poorer than in M. zigzag of a corresponding size; thus in M. zigzag there are two 

 rather large secondary tubercles inside the primary one in the interambulacra, 

 these three tubercles together forming a horizontal series. In this specimen there is 

 only one such tubercle inside the primary one. The naked spaces are somewhat 



') Ann. Nat. Hist. (5. Ser. II. 1888. p. 405. 



13* 



