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THE JOURNAL 



OE 



THE LINNEAN SOCIETY. 



Vol. XV. ZOOLOGY. No. 86\ 



* 6 ~ 7 ' CONTENTS. 



Page 



I. On the Land-Molluscan Genus Durgella, W. T. Blan- 

 ford ; with Notes on its Anatomy and Description of 

 a new Species. By Lieut. -Colonel H. H. Godwin- 

 Austen, F.E.S., F.L.S. (Plates XX. & XXI.) 291 



II. Observations on the Life-histories of Gamasince, with 

 a view to assist in more exact Classification. By 

 Albert D. Micuael, F.L.S., F.E.M.S. (Plates 

 XXII. & XXIII.) 297 



III. Observations on some British Pishes. By Francis 



Day, F.L.S 310 



IV. On the Apparent Retention of a Sur-anal Plate by a 



young JEchinometra. By F. Jeffrey Bell, M.A. 

 (Communicated by Dr. J. Murie, F.L.S.) (With a 

 woodcut.) 318 



V. On a Lithistid Sponge and on a Form of Aphrocallistes 

 from the Deep Sea off the Coast of Spain. By Prof. 

 P. Martin Duncan, M.B. Lond., F.E.S., F.L.S., &c. 

 (Plates XXIV. & XXV.) 320 



VI. On Individual Variation in the Branchial Sac of Simple 

 Ascidians. By "W. A. Herb-man, D.Sc, F.L.S., 

 F.B.S.E 329 



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