[From the American Journal op Science, Vol. XXVIII, July, 1884.] 



Art. IX. — Crustacea of the Albatross Dredgings in 1883; by 

 Sidney I. ^ Smith. 



Very little has yet been published in regard to the zoolog- 

 ical results of the deep sea explorations carried on during the 

 summer of 1883, by the United States Fish Commission, 

 although the dredgings were among the most important yet 

 made. Some of the remarkable forms of fishes discovered 

 have been described by Drs. Gill and Ryder, but the writer's 

 report on the decapod Crustacea (80 pages of text with 10 

 plates), recently put in type for the Fish Commission Report for 

 1882, is the first detailed report on the zoological collection 

 made by the Albatross, and affords an opportunity for a brief 

 review of the results of the study of the higher Crustacea, 

 which is here published by permission of the Commissioner of 

 Fish and Fisheries. 



The dredgings of the Albatross extended from off Cape Hat- 

 teras to the region of George's Banks. The number of dredg- 

 ing stations was 116, of which 30 were in less than 100 fathoms, 

 35 between 100 and 500 fathoms, 19 between 500 and 1000 

 fathoms, 27 between 1000 and 2000 fathoms, and 5 below 2000 

 fathoms. The whole number of species of Decapoda deter- 

 mined from these stations is 72, but of these at least 15 are 

 true shallow-water species. Of the remaining 57 species, 40 

 were taken below 500 fathoms, 29 below 1000 fathoms, 13 

 below 2000 fathoms, and 6 at a single haul in 2949 fathoms. 

 Of the 29 species taken below 1000 fathoms, 21 are Caridea or 

 true shrimp, and the 8 higher species distributed as follows : 2 

 Eryontidse, 3 Gralatheidse, 1 Paguroid, 1 Lithodes, and 1 Bra- 

 chyuran belonging to the Dorippidse. It is interesting to com- 

 pare these results with the lists of the fauna of the North Atlan- 

 tic below 1000 fathoms, given by the Rev. Dr. Norman in the 

 presidential address to the Tyneside Naturalists' Field Club, 

 published last year. In Dr. Norman's lists only 12 species of 

 Decapoda are recorded, none of them from as great a depth as 

 2000 fathoms, and of these 12 species, 7 were known only from 

 the Blake dredgings of 1880. 



The following are some of the more interesting new forms: 

 a new genus of Brachyura allied to Ethusa, 1496 to- 1735 fath- 

 oms ; an Anomuran belonging to A. Milne-Edwards' new genus 

 Galacantha, 1479 fathoms ; two species of Pentacheles (a genus of 

 Eryontida? allied to Willemcesia), between 843 and 1917 fath- 

 oms; a stout Palasmonid (Notostomus), six inches long and 

 intense dark crimson in color, 1309 to 1555 fathoms; a 

 gigantic Pasipkae, eight and one-half inches long, 1342 fath- 



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