ox THE ZOOLOGY OF THE SANDWICH ISLANDS. 399 



In accordance with the intention announced in the last report, Mr. 

 R. C. L. Perkins has again been sent to the islands by the Committee. 

 His departure from this country was delayed for some months by the out- 

 bieak of plague at Honolulu ; but this difficulty having disappeared, he 

 is now at work in the island of Kauai. 



Four parts of the second volume of the ' Fauna Hawaiiensis ' have been 

 published since the last report. They comprise 441 pages and 14 plates, 

 the subjects and authors being as follows : ' Orthoptera and Neuroptera,' 

 by R. C. L. Perkins; ' Coleoptera,' pt. 1, by D. Sharp and R. C. L. 

 Perkins ; 'Mollusca,' by E. R. Sykes ; ' Earthworms,' by F. E. Beddard : 

 'Entozoa,' by A. E. Shipley. 



Mr. Perkins finds that great changes have taken place in the islands 

 during his absence, and that the forests are being extensively destroyed 

 and replaced by sugar-cane, this industry being at present extremely 

 remunerative there. 



The Committee ask for reappointment. 



Investigations made at the Marine Biological Laboratory, Plymouth. — 

 Eeport of the Committee, consisting of Mr. G. C. BouRNE {Chair- 

 man), Professor E. Eay Lankester (Secretary), Professor Sydney 

 H. Vines, Mr. A. Sedgwick, Professor W. F. R. AVeldon, and 

 Mr. W. Garstang. 



Messrs. Woodward, Scott, and Brebner were prevented from visitin» 

 Plymouth during the past year. Several other naturalists, however^ 

 applied for the use of the British Association's table, and it was accord- 

 ingly allotted to Mr. A. D. Darbishire, of Balliol College, Oxford, for 

 investigations on the development and natural history of Pinnotheres ; 

 and to Mr. W. M. Aders for the collection and preparation of material 

 for studying the spermatogenesis of coelenterates. Mr. Darbishire occu- 

 pied the table for six weeks, and Mr. Aders for three weeks, during the 

 past summer. Mr. Darbishiie's report to the Committee is given below. 

 An application for the use of the table during the month of September 

 has been received from Mr. R. C. Punnett, B.A., in order that he may 

 continue some investigations on which he is at present engaged on the 

 pelvic plexus of elasmobranch fishes. 



Mr. Darbishire's Report. 



My original intention was to study the life-history and habits of the 

 crab Pinnotheres, which is a well-known inhabitant of mantle-cavities of 

 certain lamellibranchiate molluscs ; but during my visit to Plymouth 

 no breeding females could be found, and my observations were limited to 

 the determination of some new points in the habits and structure of the 

 male of Pinnotheres pisurn. A specimen of this was dredged in company 

 with some Cardium norvegicum, from which it presumably came. The 

 habits of the male were very interesting to observe in view of the seden- 

 tary habits of the female. It could swim forwards for a long time and at 

 a good speed, and with an accurate sense of direction. It swam in a 

 manner hitherto undescribed in crabs by rowing with its last two pairs of 

 thoracic legs, each of which has a double row of hairs on its posterior 



