﻿44 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. /S 



He returned to Sao Francisco October 27, when several cases of 

 specimens were packed for shipment to Washington. The weather 

 and tides being favorable, some excellent collections of shrimps and 

 amphipods were made at this station, and he says " I've extended the 

 ranges of a number of species, and surel}- found a couple of new 

 ones here." 



He arrived off Itajahy at 8 p. m., November 2, after a cold, rainy 

 trip, and early the next morning anchored off Florianopolis. Some 

 tow-net hauls and shore collecting here produced excellent results. 



Owing to the many unavoidable delays. Dr. Schmitt has not been 

 able to progress as rapidly as he had hoped, but the ground has been 

 as thoroughly worked as possible, and several cases of specimens 

 have already been received at the Museum. His collections at this 

 time comprise several thousand specimens and consist chiefly of 

 Crustacea, Coelenterates, Porifera, Echinoderms, Annelids. Bryozoa, 

 and Fishes. 



EXPERIMENTS IN CERION-BREEDING AT THE TORTUGAS 



Dr. Paul Bartsch, curator of mollusks, U, S. National Museum, 

 spent the period between the last call of the "Anton Dohrn " at Key 

 West and the closing of the laboratory of the Carnegie Marine Bio- 

 logical Station, August 12-24, 1925, at the Tortugas, largely upon 

 work on his Cerion colonies. 



The part of the Cerion breeding work about which the greatest 

 interest centers, were the little islets made last year by placing con- 

 crete trenches filled with water arovmd four 6x6 feet areas and 

 eight 3x3 feet spaces. In the first of the larger of these areas were 

 placed last year 25 Cerion incanuni and 25 Cerions of a new species. 

 Of these, 22 Cerion incanuin and 18 of the new species were found 

 dead in the inclosure this year. But, in spite of the great mortality, 

 very small young individuals were present. It is to be hoped that some 

 of these may reach maturity and may show crossing. 



In the second inclosure had been placed 25 Cerion incanuni and 

 25 Cerion chrysalis. Eleven of the Cerion incanuni and 12 of the 

 Cerion chysalis were found dead, but here, too, young were in 

 evidence. 



In the third inclosure had been placed 25 Cerion incanuni and 25 

 Cerion nmmmia. Of the Cerion incanuni, 16 were found dead, and 

 of the Cerion miinmra, 17. Here, too, young were in evidence. 



