( 2 ) 



JOUENAL 



OF THE 



EOYAL MICROSCOPICAL SOCIETY. 



Ser. 2.— Vol. I. Part 3. 



(JUNE.) 



CONTENTS. 



TbANSACTIONS of the SoOIETT PACK 



VI. — The Diatoms op the London Clay. By W. H. Shrubsole, 

 F.G.S. With a List of Species, and Eemarks. By F. 



Kitton, Hon. F.RM.S. (Plate V., Fig. 1) 381 



VII. — On the Estimation of Aperture in the Microscope. By 



Professor E. Abbe, Hon. F.K.M.S. (Figs. 111-113) .. .. 388 



VIII. — On a New Species of Htdrosera (Wallioh). By Henry 



Stolterfoth, M.D. (Plate V., Figs. 2 and 3) 424 



Summary of Current Researches relating to Zoology and 

 Botany (principally Invertebrata and Cryptogamia), Micro- 

 scopy, &c., INCLUDING Original Communications from Fellows 



and others 425 



Zoology. 



Development of Petromyzon (the Lamprey) .. .. 425 



Origin of Colcmial Organisms 428 



Ear of Ganoids 429 



Fauna of the Austral Regions 430 



Zoological Results of the Bareniz Expedition 432 



Digestive Organs of the Dibranchiate Cephalopoda 433 



Accessory Generative Organs of Terrestrial Mollusca 435 



Organization of Tethys fimbriata 437 



Tunicata of the ' Challenger' Expedition, (ic 438 



Budding of Pyrosoma 438 



Queensland Bryozoa 439 



New Zealand Fossil Bryozoa 439 



Fossil Chilostomatous Bryozoa from Australia 440 



Detonating Organ of Brachinus crepitans 441 



Glands connected with the Bee's Tongue 442 



Alternation of Generation in the Cynipidai 443 



Shining Slave-makers {Polyergus lucidus) 444 



Chorda Supra-spinalis of the Lepidoptera and the Nervous System of 



Caterpillars 445 



Beaded Villi of Lepidoptera-scales 445 



Histolysis of the Muscles of the Larva during the Postembryonic Develop- 

 ment of the Diptera 445 



Axis-cylinder and Peripheral Nerve-ceUs in relation to Sense Organs in 



Insects 446 



Sexvul Organs of the PhalangidsB 447 



Auditory Organ of the Ixodidx 449 



Deep-sea Crustacea of the Gulf of Mexico 449 



Studies on the Crustacea Deeapoda 450 



Change of Colour in Crabs and Prawns 452 



Circulating Apparatus of Edriophthalmout Crustacea ., 453 



