142 



ECHINOIDEA. II. 



Sudero). The bathymetrical distribution of the species is, as far as hitherto known, from shallow water 

 to ca. 150 fathoms. 



Ech. pennatifidzim is further stated to occur in the Mediterranean and at the American Coasts of 

 the Atlantic (Florida and West-Indies). The presence of the species in the Mediterranean at Tamaris- 

 sur-Mer' was announced bj' Professor Koehler, who has done me the very great service to send 

 me one of these specimens. A close examination thereof, however, shows that this specimen differs in 

 several respects considerably from pe^inatifidum. — The labrum reaches to the second adjoining ambu- 

 lacral piates as in flavesccns, whereas in ptmnatifidiiin it ends off the middle, or (in the largest speci- 

 men examined) even at the anterior end of the first ambulacral plate. Four ambulacral piates reach 

 within the subanal fasciole, which accordingly includes three pairs of pores; in pennatifidziiu three 

 piates reach within the fasciole, with two or only one pair of pores. The jDeriproct is like that of 

 Jlavescens, very different from that of pennatifiduni. The anal opening is rather eccentric, Ijing near 

 the upper edge, surrounded by small, irregular piates. The lower part of the anal area is bordered by 

 a series of large, regular piates, which diminish in size towards the upper edge; the}' are closely 

 covered by a fine granulation. The anal fasciole is in direct connection with the subanal fasciole, 

 whereas in pennatijidum it is separated from the latter by a rather broad band of coarser tubercle.s, 

 as is well seen in Koehler's Fig. 10. PI. IV (Monaco); in young specimens this is, however, not the 

 case, the granulation of the two fascioles uniting in the median line. 



The number of pores in the petals differs considerably from what is found in pcnnatifidiDii of 

 a corresponding size. I give here the measurements of the test and the number of pores in the petals 

 of this specimen, and, for comparison, of specimens of pennatijidum and fla^escens of a correspon- 

 ding size. 



The internal fasciole seems to be larger than in pennatifidaim ( — unfortunately the anterior 

 part of the test is damaged, so that I cannot state that exactly — ); in any case it is more remote 

 posteriorly from the apical system than in the specimen of 52""" length, of which the above measure- 

 ments are given — in the latter the fasciole passes over the second plate in the posterior interambu- 

 lacrum, in the Mediterranean specimen it passes over the 4th — 5th plate of the posterior interambula- 

 crum. The greatest width of the fasciole is 10™'" in the said specimen of pennatifiditm, 13""" in the 

 Mediterranean specimen; it is further to be remarked that one or two large tubefeet of the posterior 

 series of the anterior petals are within the fasciole, which is not the case in either pennatijid^i7n or 



1 Sur la presence, en Méditerranée, de l'Asteras rubens Liuné et de l'Echinocardium pennatifid 

 Anzeiger. XXI. Nr. 567. 189S. 



um Norniau. Zool. 



