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THE AMERICAN NATURALIST [Vol. XLII 



treated provisionally, as distinct. Similarly lie examines (Bei- 

 trag II) specimens from Funafuti and concludes that these are 

 also recognizably different from those from the type locality. 

 We consequently have as "provisional" designations Ptychodera 

 fl. caledoniensis, Ft. fl. laysanica, and Ft. fl. funafutica. The 

 author points out that while Funafuti (8° 30' S.) lies between 

 New Caledonia (20° S.) and Laysan (26° N.), Ft. fl. funafutica 

 is not intermediate in structure between the other two forms. 



One might, perhaps, question the utility of speaking of such 

 designations as provisional when as a matter of fact no zoolog- 

 ical name whatever can be confidently claimed to be final. In 

 the reviewer's opinion there is, nevertheless, real merit in 

 Spengel's practise. It seems to him that proof of the tendency 

 of plant and animal kinds to break up into more kinds as s 

 as ready means of intercommunication is prevented, is so strong 

 that the systematist is generally bound to suspect that specimens 

 from widely separated localities (at least in many groups) are 

 different until they are shown not to be so. This provisional 

 naming might be looked upon as a recognition of this principle. 



Another Pacific species is from Japan (On a new Enterop- 

 neust from Misaki, Balanoglossus misakiensis, n. sp.) 2 and an- 

 other Indian Ocean one from the coast of India (Enteropneusta 

 from Madras) . 3 



Hardly less notable than the new species from the least ex- 

 plored parts of the sea is the bringing to light of new ones in 

 the best explored parts. Spengel 4 describes a species of Glosso- 

 balanus from the Bay of Naples. The author well remarks that 

 it is "sicher aufallend" that a new species represented by a 

 single specimen should stand accredited to shallow water in the 

 immediate vicinity of the Naples Zoological Station. 



2. Development. — What must be counted as the most impor- 

 tant contribution to Enteropneust development that has ap- 

 peared since Bateson 's series of papers, 1884-1886, has just been 

 published by Dr. B. M. Davis (The Early Life-history of Doli- 

 choglossus pusillus Ritter. 5 Davis had shown four years earlier 

 that this California species develops without passing through a 



the Atlantic Coast of the United States, the species studied by 



