no. 1808. RECENT AFRICAN CRINOIDS— CLARK. 



Family HIMEROMETRID.E. 



Craspedometra ater. Diclirometra protectus. 



Heterometra savignii. Diclirometra Munzingeri. 



Stephanometra marginata. Diclirometra palmata. 



Family COLOBOMETRID.E. 



Colobometra chadwicM. 



Family TROPIOMETRID/E. 



Tropiometra encrinus. 



Family ANTEDONID^. 



Jridometra segyptica. 



Family PENTAMETROCRINID^E. 



Pentametrocrinus (new species). 1 



Family RHIZOCRINID/E. 



Rhizocrinus cliuni. 



Mediterranean coast. — So far as we know, the Mediterranean coast 

 of Africa is the same faunally as the Mediterranean coast of Europe. 

 Only two genera, Antedon and Leptometra, are found here, both of 

 which are primarily, as I have shown, of Indian Ocean or East Indian 

 origin, 2 and both of which occur in the Atlantic northward nearly or 

 quite to Norway. These two genera may be said to delimit the 

 European faunal area — in reality an attenuated derivative from the 

 great In do-Pacific- Japanese region — and this European faunal area 

 may logically be divided into (1) the Mediterranean area, inhabited 

 by Antedon mediterranea, A. adriatica, and Leptometra plialangium; 

 and (2) the European-Atlantic area, inhabited by Antedon petasus, 

 A. bifida, and Leptometra celtica, and extending from Norway south to 

 Morocco and Madeira. 



Northwest coast. — This is the meeting ground between the preceding 

 and succeeding littoral faunal areas; here the European- Atlantic area 

 reaches its southern and the West African its northern limit. 



In the deeper water, however, inhabited by species of the Inter- 

 mediate faunal zone, 3 we find a strongly marked "West Indian" 

 clement, indicated by Neocomatella, Pentametrocrinus atlanticus, and 

 Rhizocrinus parfaiti. 



1 Deep-water species. 



2 Cf. Vid. Medd. fra den naturhist. Forening i K0benhavn, 1909, p. 12S et seq. 



3 Idem., p. 120. 



