DO THE DEPTHS OF THE SEA. [chap. hi. 



trip would require a clear fortnight, as much coal was 

 stacked on deck as was considered prudent. 



This cruise was entirely successful. The weather 

 was remarkably fine, and Mr. Gwyn Jeffreys' party 

 found it possible to work the dredge during seven 

 days at depths exceeding 1,200 fathoms, and on four 

 days at less depths. The greatest depth achieved was 

 1,470 fathoms (Station 21), and this dredging yielded 

 mollusca, a stalked-eyed crustacean with unusually 

 large eyes, and a fine specimen of Holothuria tremula. 



The deep dredgings in this trip yielded an abund- 

 ance of novel and most interesting results in every 

 sub-kingdom of the invertebrates. Among the mol- 

 lusca were valves of an imperforate brachiopod, with 

 a septum in the lower valve, which Mr. Jeffreys 

 proposes to name Atretla gnomon. Among the Crus- 

 tacea were new species of the Diastylidce, and many 

 forms of Isopoda, Amphipoda, and Ostracoda, several 

 of them new to science. 



Two or three specimens were obtained at a depth 

 of 1,215 fathoms (Station 28) of a very remark- 

 able echinoderm belonging to the genus Pour- 

 talesia, A. Ag. All these specimens were appa- 

 rently immature, judging by the condition of the 

 ovaries. I have named this species j^ovisionally 

 V our tale sia pit i ale. After careful consideration I 

 have come to the conclusion that it is not the 

 young of a form of which we afterwards took a 

 mature example in the cold area between Faeroe and 

 Shetland (Station 64), which will be described here- 

 after. Pine corals were constantly dredged in the 

 more moderate depths, particularly great living masses 

 of Lophohelia prolifera (Fig. 30), with smaller tufts 



