45 



over, arranged, compared and differentiated. The author then gives a 

 detailed account of the Solenoconchia, comprising- Dentalium, Siphoden- 

 talium and Cadulus. Of the eighteen species of Dentalium eleven are 

 new forms, seven species of Siphodentalium are all new to Science ; 

 among the species of the genus Cadulus nine are new and one a variety. 

 December 5, 1878. — Three zoological papers were read. »On 

 some Coleoptera (collected by Charles Darwin) of geographical in- 

 terest« by Fred. H. Waterhouse. The insects in question have lain 

 undetermined for a long series of years and all prove new to science: 

 Phytosus Daricinii, from the Falklands, Choleea falklandica , Elmis 

 brunnea and Anthicus Wollastonii from St. Helena, Scaphisoma elong a- 

 tum, from Kio Janeiro (the first species from South America) and 

 Prosthetops (P. capensis) n. g. from South Africa. — »On the geogra- 

 phical distribution of Indian Freshwater Fishes« by Dr. Francis Day, 

 dealing with the families Scombresocidae, Qyprinodontidae, Cyprinidae, 

 Notopteridae and Symbranchidae. Of 369 species 2 are African, 27 Ma- 

 layan, 2 common to both regions. The Indian Freshwater fish affinities pre- 

 ponderate to those of the Indo-Chinese and Malayan subregions. Dr. Day 

 believes that the Indian freshwater fishes owe their derivation to three 

 subordinate separate faunas: 1) that belonging to the Ghauts, Ceylon, 

 the Himalayas and the Malay Archipelago, wherein may be distingui- 

 shed two fish races, a Palaearctic and a Malayan ; 2) a fish fauna of the 

 plains Avest of the Indus with an African element in it ; 3) that spread 

 over the plains east of the Indus, and by far the largest, which appears 

 to have a Burmese connection. — »On the Mollusca of the ,Challenger'- 

 Expedition« by the Rev. R. Boog Watso n. Four genera of Trochidae : 

 Sequinzia with 2 n. sp., and the three new genera Basillissa, Gaza and 

 Bemhix. 



3. Mittheilungen zur microscopischen Technik. 



Von Dr. A. Lang, Bern (z. Z. Zoolog. Station Neapel). 



1. Eine neue Tinctionsmethode. 



Schon seit längerer Zeit mit der schwierigen Histologie der Tur- 

 bellarien und insbesondere des Nervensystems dieser und anderer Grup- 

 pen der Plattwürmer beschäftigt, erwiesen sich mir die bisher üblichen 

 Methoden der Färbung hauptsächlich der Nervengewebe als nicht in 

 jeder Beziehung ausreichend. Es erschien mir als hauptsächlich wün- 

 schenswerth, z. B. beim Nervensystem nicht nur die Kerne und Kern- 

 körperchen, sondern auch die Fasern und das Protoplasma der Gang- 

 lien deutlich zu färben. Viele Dendrocoelen mit dicker Basilarmembran 



