392 CLARK: BOURGUETICRINIDAE 



Bythocrinus Doderlein. 



Bythocrinus Doderlein, Wiss. Ergeb. der deutschen Tiefsee-Expedi- 

 tion auf dem Dampfer "Valdivia" 1898-1899, 17, 1912, Heft 1, 

 p. 11 (genotype Rhizocrinus [Bythocrinus] chuni or Rh. [B.\ braueri, 

 spp. nov.). 

 Geographical Range. — East Indies, and eastward to the northeastern 

 coast of Africa; Atlantic coasts of northwestern Africa and southwest- 

 ern Europe; Gulf of Mexico, and southward at least to Ceara, Brazil. 

 Bathymetrical Range.— From 158 to 1668 meters (88 to 927 fathoms). 

 Thermal Range.— -The records are 3?8 and 4?6C., and 40?5 Fahr. 

 Included Species. — Bythocrinus braueri Doderlein, Bythocrinus brevis 

 (A. H. Clark), Bythocrinus chuni Doderlein, Bythocrinus conifer (A. H. 

 Clark), Bythocrinus intermedins A. H. Clark, Bythocrinus nodipes (Dod- 

 erlein), and Bythocrinus robustus (A. H. Clark). 



Democrinus Perrier. 



Democrinus Perrier, Comptes rendus, 96, 1883, No. 7, p. 450 (geno- 

 type D. parfaiti, sp. nov.). 



Geological Range. — First found in a breccia containing a human skele- 

 ton at Guadeloupe, French West Indies; otherwise only known from the 

 recent seas. 



Geographical Range. — From Sulu (Jolo) to Ceram Laut and Timor; 

 near Krakatoa; coast of Morocco; Caribbean Sea and Gulf of Mexico. 



Bathymetrical Range. — From. 112 to 2050 meters (62 to 1139 fathoms). 



Thermal Range. — No records. 



Included Species. — Democrinus parfaiti Perrier, Democrinus rawsonii 

 (Pourtales), Democrinus sabae (A. H. Clark), and Democrinus weberi 

 (Doderlein). 



There are in the literature many records referring to species of this 

 genus which are undeterminable. 



