36 



region of lateral bands. (Esophagus simple, Male 9 mm. in 

 length, witn over 24 pairs of prseanal and with 5 pairs of post- 

 anal papillae. Spicules solid at tips, sickle-shaped, measuring 

 0-35 mm. and 0*4 mm. in length. Female 15 mm. long. Yulva 

 6 mm. from mouth. Ova round, with thick and pitted shell. — 

 Types in London School of Tropical Medicine. 



Dr. A. Smith Woodward, F.E.S., Y.P.Z.S., on behalf of Mr. K. 

 Lydekker, exhibited an old coloured print of the chief room of 

 Bullock's Museum (1809-1819) in the building subsequently 

 known as the Egyptian Hall. 



A paper was read by Sir Hexry H. Howorth, D.C.L., F.R.S., 

 .Z.S., on " Some Living Shells, their Recent Biology, and the 

 Light they throw on the Latest Physical Changes in the Earth. — 

 I. Mya arenaria." He stated that the Mya arenaria or Clam is 

 widely distributed in the North Boreal, European, and North- 

 American seas, and claimed to prove that it is a recent migrant 

 into the former, and has probably not been there more than 300 

 years. The notion that it is an Arctic shell is a mistake. In the 

 Arctic lists Mya tru7icatct var. ohlonga has been mistaken for it, 

 and the glacial character of the beds in which it has occurred, 

 which has been postulated from its occurrence there, has ac- 

 cordingly been a wrong inference. Brogger has argued that it 

 migrated from Amei'ica. It was abundant in the Crag seas, and 

 occurs in derivative fragments in the Drift-beds, but it does not 

 occur in the estuarine deposits or raised beaches, proving that 

 after the period of the Crag it became extinct in Europe and has 

 since, been re-introduced. He regarded the cause of its extinction 

 as a mystery, since tlie group of estuarine shells with which it is 

 found has lived continuously in Europe since later Crag times. 



Mr. 0. Tate Regan, M.A., F.Z.S., read a paper on the Asiatic 

 Fishes of the family Anabantidse (including the Osphromenidse). 

 He remarked that the order Labyrinthici was an isolated and 

 terminal group, probably derived from a Cypi-inodontoid stock, 

 and that it comprised two suborders, Ophiocephaloidei and 

 Anabantoidei, the latter including the families Anabantidfe and 

 Luciocephalidse. The Indian element in the freshwater fish- 

 fauna of Celebes, including two Labyrinthic fishes, was shown to 

 consist of (1) species which had travelled by sea, and (2) species 

 which had probably been introduced by man. The great im- 

 portance of Wallace's Line for freshwater fishes was thus vindi- 

 cated. The Asiatic genera and species of Anabantidaa were 

 described, including several new forms of Betta and Trichopodus, 

 and the Asiatic genus Anahas was shown to diflfer mai^kedly from 

 the African Ctenopoma and Spirohranchus. 



Mr. J. Lewis Bonhote, M.A., F.Z.S. communicated a paper 

 on some Mammals brought home from Egypt. The paper dealt 



