KCmxoiDHA. 11. ,, 



from the deep station off Cape \'erde, lent nie the colotired fi<^uie made on board the Valdivia>* from 

 the Uving animal. Further, Professor Theel sent me all the material of Echinocyanms from the Jo- 

 sephina -Expedition. 1 wisli here to express m>- deep gratitude to these gentlemen for their great 

 liberalit}-. I have also received two specimens of iEchinocyarnus pzisillusA from the Paris Museum from 

 the , Travailleur (or : Talisman ) 2100 M. The result of a careful study of all tliis material has 

 been that most of these specimens proved identical with the American form, and that \et a third 

 species is represented b\- some specimens from the greater depth.s, whereas the true Echinocyanms pu- 

 silliis is only found among those from more shallow water. The two new species are described here 

 under tlie names Eclii}ioc\ai)ius graiidiporits and Ecli. macrostoinns. 



Echinocyanius grandiporus n. .sp. The shape of the te.st (PI. XII. Figs, i, 5) is, as a general 

 rule, more rounded than in pitsilhis. scarcely broader at the posterior than at the anterior end, which 

 • is almost invariably the case in the latter species. Also the height of the test is generalh' a little 

 larger than in piis////is. On account of the great variabilit\' in pusilliis. the shape of the test cannot, 

 howe\er, afford anv ver\' reliable character, the more so, as some variabilit\- occurs also in grandiporus 

 in this respect, though not so much b\- far as in piisilhis. 



The madreporic plate is a little elevated and generally somewhat larger than in piisillns ; the 

 peristome and anal area are generally not larger than in that species. The anal area is small, a little 

 nearer the edge of the test than is the case in pusillns. The peristome may be more or less pentagonal; 

 the edge is only .slightly bent inwards, and the whole actinal side is more flat than is generallv the 

 case in ptisilhis. The apical system presents a conspicuous difference from piisillus. The ocular pores 

 are very large, as large as or even a little larger than the genital pores; the 4 genital pores and 5 

 ocular pores form together a conspicuous circle or pentagon round the madreporic plate with its one 

 madreporic pore in the same position as in piisillus. (In one instance I have fotind a genital pore 

 developed in the odd posterior interambulacrum). This feature makes a very easih' observable char- 

 acter distinguishing this species from pitsillus: in accordance herewith it- may be said almost with 

 certainty that the Fig. 3. PL XI. e in Revision of Echini is the true piisillus, whereas those figured 

 on PI. XIII. I — 8 are grandiporus, which is also seen by an examination of the nimiber and arrange- 

 ment of the ambulacral pores in these figures. — It will be noticed that in the Fig. 6. PI. XIII of the 

 < Revision 5 very small pores are represented between the fi\'e large ocular pores in the place of 

 the genital pores. I have myself seen a specimen, 5'5""" in length, in which the genital openings are 

 much smaller than the ocular pores. The figure mentioned ma\- thus well represent such a .specimen; 

 the presence of 5 genital openings mav, of course, be jjossible, since it can be found among specimens 

 with the genital pores of the usual size; but, in an\- case, if the figure be correct, it represents an 

 abnormal individual. The shape of the petals in this figure is, otherwise, not in accordance with what 

 is generally found in grandiporus. so that it seems probable that the differences shown in this figure 

 from other specimens of grandiporus are due to incorrect drawing. The small size of the genital pores 

 in the case mentioned will probabh- be due to an abnormal late development of the pores. That the 

 specimens with the small pores should represent the males is very unlikely; in that case their 

 number would certainly be considerably larger. 



The Ingolf-Fxpedition. IV. _■. 5 



