37 



A second communication from Mr. Regan, entitled " On the 

 Anatomy, Classification, and Systematic Position of the Teleostean 

 Fishes of the Sub-order Halotriognathi," showed that the Lampri- 

 didse, Veliferidse, Trachypteridse, and Lophotidse formed a natural 

 grovip closely related to the Beryciformes, from which they 

 differed especially in the structure of the mouth. The maxillaries 

 were protractile and had well-developed inner posteriorly directed 

 processes, which moved backwards and forwards in a pair of 

 grooves on each side of a median keel on the antero-superior face 

 of the vomer ; whereas in the Beryciformes the maxillaries were 

 articulated to the vomer, and each had a ligamentous attachment 

 to a process of the palatine, which prevented any movement other 

 than the rotation forward of the distal extremity. The Halo- 

 triognathi were divided into Selenichthyes {Lampris), Histich- 

 thyes {Velifer), and Tseniosomi (Trachypteridse and Lophotidse). 

 Reasons were given for believing that the Beryciformes were 

 directly derived fi'om Clupeoid Malacopterygians. 



Mr. R. I. PococK gave a brief abstract of a monograph of the 

 Monkeys of the genus Cercopitheciis and pointed out that all the 

 . known forms of this genus might be arranged into groups typified 

 by the following species : — patas, cethiops, petaurista, cepfius, 

 nictitans, leucamp)yx, alhigularis, mona, neglectus, Vhoesti, and 

 diana. 



Mr. R. I. PococK also read a paper upon some African species 

 of Felis, based upon specimens exhibited in the Society's Gardens. 

 He drew special attention to some interesting points connected 

 with F. nigripes, F. served and servalia, and F. aurata { = chryso- 

 thrix). A specimen of the last-named species from Sierra Leone 

 changed from red to dusky grey while living in the Gardens, thus 

 proving that the differences in colour between individuals of this 

 species were not of specific or subspecific value. 



Mr. R. T. Gt'NTHER contributed a paper on the Jelly-fish of the 

 genus Limnocnida collected during the Third Tanganyika Expe- 

 dition. The material had been obtained on four distinct dates in 

 September, November, and February, by Dr. W. A. Cunnington, and 

 therefore during the season of the great rains. The greater number 

 of specimens in all the collections showed a vigorous gi-owth of 

 young medusa-buds on the manubrium, and that therefore the 

 theory that asexual reproduction occurred during the dry season 

 only, which was propounded by Mr. Moore, must be abandoned. 



Dr. Cunnington's material threw new light upon the order and 

 siiccession in which the tentacles developed, and had enabled the 

 author to record all the stages of tentacle development as exhibited 

 by individuals ranging from 2 mm. to 22 mm. 



Oei'tain variations in the arrangement of radial canals and of 

 sense-organs were discussed. As large a percentage as 24 "/o were 



