332 Zoological Society : — 



deep subcaudal circular pit, with its large, thick, prominent rim, 

 could not have been overlooked on the most casual examination. 



I have not considered it right to cut into the single specimen 

 which we possess of this interesting genus, either to examine the con- 

 sistence or form of the shell, or to describe the form, structure, and 

 disposition of the teeth — all most important particulars, which I hope 

 the receipt of other specimens will enable me before long to supply. 



The pore near the hinder margin of the shield is deep and lined 

 with membrane, which is swollen up and bladder-like at the base in 

 the specimen in spirits, not showing any indication of a shell ; and 

 therefore it cannot be (as has been suggested by one zoologist, to 

 whom I had showed the specimen) compared to the open space which 

 is left on the upper surface of the shell by the edge of the mantle 

 being only partially reflected over its outer surface, as in the genera 

 Drusia, Girasia, Mcerialla, and Parmacellus in the Arionidae, and 

 Peltella in the Limacidse. It is probably more properly to be com- 

 pared with the luminous gland which is said to be found, but so 

 imperfectly and differently described as existing in the genus Phos- 

 phor ax. 



The mantle is rather produced and free in front and on the front 

 part of the sides, but does not appear to be so free as in the Eu- 

 ropean species of the genus Limax. 



Urocyclus Kirkii. 



Pale brown, with minute square black spots on the sides, with a 

 black streak on each side of the back ; middle of the back with two 

 darker brown streaks. The sides of the body with diverging sunken 

 lines. The margin of the foot with a series of small black specks. 



Hab. Central Africa. 



June 28, 1864.— Dr. J. E. Gray, F.R.S., in the Chair. 



On a New Genus of Pediculate Fish from the Sea of 

 Madeira. By Dr. Albert Gunther, F.Z.S. 



Mr. J. Y. Johnson discovered during his last sojourn in Ma- 

 deira, on the 24th December 1863, a fish which proves to be the type 

 of a new genus, not only on account of its extraordinary form, but 

 also on account of the absence of ventral fins. In the latter respect 

 it agrees with Ceratias from the coast of Greenland, from which, 

 however, it differs in its dentition. 



It must be extremely rare, as the specimen entrusted to me by 

 Mr. Johnson for description, and presented by him to the British 

 Museum, is the only one which has ever come to the knowledge of 

 naturalists. Neither the Rev. R. T. Lowe nor Mr. Johnson had 

 heard of its existence, nor did the fishermen recognize it. It is evi- 

 dently a deep-sea fish, inhabiting the same horizontal marine zone 



