CRUSTACEANS. 



43 



Sulphates and soluble salts were not determined. Except for the slightly higher magnesia, 

 these analyses closely resemble those of moUusks. 



One analysis of a barnacle, Balatius tintimiahulm, by Biitsclili,^' is essentially similar to ours. 



His figures are — 



CaCO, 94.44 



MgCOs 1-20 



CajPoOs 36 



CaSd^.2HjO 2.06 



98.06 

 In all the analyses calcium carbonate is the main constituent, and there are only minor 

 impurities. We have found no other analysis of a barnacle recorded. 



In the second group of crustaceans the following species were analyzed: 



1. Trypkosa pinguis Boeck; sand flea. Woods Hole, Mass. 



2. Pagurus rathbuni Benedict; hermit crab. Bering Sea. Albatross station 35.31: latitude, 50° 55' N.; longitude, 

 174° 17' W.: depth of water. 105 meters; bottom temperature, 1.7° C. 



3. Callinectcs sapidus M. J. Rathbun; blue crab. Ranges from Cape Cod to Florida. 



4. Homarus americanus Milne-Edwards; common lobster. Vineyard Sound, Mass. 



5. Pandalus platyceros Brandt; shrimp. Off Monterey Bay, Calif.; Albatross station 3129; latitude, 36° 39' 40" 

 N.; longitude. 122° 01' W.; depth, 49.4 meters; bottom temperature, 6.5° C. 



6. Lilhodes maia Linn6; spider crab. North Atlantic coast, precise locality of specimen unknown. 



7. Libinia emarginata Leach; spider crab. Vineyard Sound, Mass. 



8. Munida iris Milne-Edwards; long-armed munida. Off Chesapeake Bay; Albatross station 2420; latitude, 37° 

 03' 20" N.; longitude, 74° 31' 40" W.; depth, 190.3 meters; bottom temperature, 8.7° C. 



9. Crago dalli Rathbun; a shrimp. Off Cape Strogonof, Alaska; Albatross station 3294; latitude, 57° 16' 45" N.; 

 longitude, 159° 03' 30" W.; depth, 54.9 meters; bottonJ temperature, 5° C. 



10. PanMfiViis arjus Latreille; spiny lobster. West Indies. 



11. Chloridella enipusa Say; mantis shrimp. Ranges from Cape Cod to Florida. 



12. Eriphia sebana (Shaw). Chance Island, Mergui Archipelago, off coast of Tenasserim, Lower Burma. Latitude 

 about 10° N. A crab. 



13. Grapsus grapsus tenuicrustatics (Herbst). Aldabra Islands, Indian Ocean; latitude, 9° 26' S.; longitude, 46° 

 35' E. A crab. 



Analyses 12. 13 by B. Salkover. 



14. Penaeus brasiliensis Latreille; edible shrimp. Ranges from New York to Brazil. 



Analyses of crustaceans. 



" Butschli, O., K. GeseU. Wiss. Gottingen Abh., No. 3, 1908. 



