A MONOGRAPH OF THE EXISTING CRINOIDS 45 



(6) The Europe an- Atlantic subdivision, extending on the Atlantic coast from 

 Madeira and Morocco northward; 



2. The South European-Northwest African-Antillean division, extending from 

 Madeira and Morocco northward to the Bay of Biscay and westward to and including 

 the Caribbean Sea; 



3. The West African-South American division, including the coast south of 

 Morocco and the opposite coast of Brazil, with the intervening islands; 



4. The Southeast African division, extending from Mombasa to Cape Town, and 

 eastward to include Madagascar, the Seychelles, Reunion and Mauritius, and the inter- 

 vening islands eastward to the Chagos Archipelago; the southern part of this division, 

 comprising the coasts of Cape Colony and Natal, forms the Cape subdivision ; and 



5. The Northeast African division, extending from Somaliland northward 

 throughout the Red Sea and eastward to the Persian Gulf. 



The West African-South American division is an attenuated offshoot from the 

 South European-Northwest African-Antillean division, which itself is derived from 

 the Southeast African division, the last the somewhat modified southwestern extremity 

 of the great Indo-Pacific-Japanese faunal area. The European faunal division is 

 probably an attenuated offshoot from the Northeast African division, which itself is 

 the considerably modified northwestern extremity of the great Indo-Pacific-Japanese 

 faunal area. 



A comparative table showing the West Indian comatulid genera and the corre- 

 sponding East Indian genera is given; included among the West Indian genera is 

 Analcidometra, paired with Stephanometra, a nomen nudum. 



It is stated that the crinoid fauna of the entire west coast of North and South 

 America is Magellanic in its affinities, in striking contrast to the conditions in the 

 Caribbean Sea. No crinoid appears ever to have passed the Isthmus of Panama in 

 either direction, and there is not even a subfamily common to the two sides. 

 The previously described species recorded are: 



Comatella maculata. Thalasso?netra lusitanica. 



Capillaster multiradiata. Thalassometra omissa. 



Comanthus (Bennettia) wahlbergii. Thalassometra multispina. 



Comanthus {Validia) parvicirra. Pachylometra sclateri. 



Heterometra savignii. Antedon bifida. 



Stephanometra marginata. Antedon mediterranea. 



Stephanometra indica. Antedo7i hupferi. 



Dichrometra protectus. Leptometra celtica. 



Dichrometra jyahnata. Leptometra phalangium. 



Dichrometra klunzingeri. Pentametrocrinus altanticus. 



Dichrometra flagellata. Endoxocrinus wyvillethomsoni. 



Cenometra emendatrix. Gephyrocrinus grimaldii. 



Tropiometra carinata. Bathycrinus aldrichianus. 



Tropiometra picta. Bathycrinus gracilis. 



Crotalometra magnicirra. Bathycrinus perrieri. 



Crotalometra porrecta. Bathycrinus recuperatus. 



Crotalometra fiava. Rhizocrinus parfaiti. 



Rhizocrinus chuni. 



