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THE JOURNAL 



OF 



THE LINNEAN SOCIETY. 



( /9 - 



Vol. XV. ZOOLOGY. No. 88. 



CONTENTS. 



Page 



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

 IX. Pleurotomidss {continued). By the Rev. Robebt 

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



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

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

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



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

 Pleurotomidse (continued). By the Rev. Robebt 

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

 woodcuts.) 457 



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

 Sponges of the Order Echinonemata. By Stuabt 

 O. Ridley, M.A., E.L.S. With Descriptions of 

 two additional new Species of Dirrlwpalum by Prof. 

 P. Mabtis Duncan, M.B. Lond., E.R.S., E.L.S., Ac. 

 (Plates XXVIII. & XXIX.) 476 



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



LONDON: 

 SOLD AT THE SOCIETY'S APARTMENTS, BURLINGTON HOUSE, 



AND BY 



LONGMANS, GREEN, READER, AND DYER, 



AND 



WILLIAMS AND NORGATE. 



1881. 



