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THE JOURNAL 



OF 



THE LINNEAN SOCIETY. 



Vol. XV. ZOOLOGY. No. 88. 



CONTENTS. 



Page 



I, Mollusca of H.M.S. ' Challenger ' Expedition. — Part 

 IX. Pleurotomidae (contimced) . By the Rev. Robebt 

 Boog Watson, B.A., F.E.S.E., F.L.S., &c 413 



II. On the Nostrils of the Cormorant (Phalacrocorax carlo). 

 By Professor J. C. Ewakt, M.D. (Communicated 

 by G. J. Romanes, F.R.S., Sec. L.S.; 455 



III. Mollusca of H.M.S. ' Challenger ' Expedition.— Part X. 



Pleurotomidse {continued). By the Rev. Robebt 

 Boog Watson, B.A., E.R.S.E., F.L.S., &c. (With 2 

 woodcuts.) 457 



IV. On the Genus Plocamia, Schmidt, and on some other 



Sponges of the Order Echiaonemata. By Stuabt 

 0. Ridley, M.A., F.L.S. With Descriptions of 

 two additional new Species of Dirrliopalv/m by Prof. 

 P. Maetin Duncan, M.B. Lond., F.R.S., F.L.S., &'c. 

 (Plates XXVIII. & XXIX.) 476 



Index, Titlepage, Contents, &c. to Vol. XV. 



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AND BY 



LONGMANS, GREEN, READER, AND DYER, 



AND 



WILLIAMS AND NORGATE. 



1881. 



