732 DB. B. O. CUNNINGHAM ON TKB [June 6, 



EXPLANATION OP THE PLATES. 



Plate XLI. 

 Chrysichthys hilttikoferi, adult, p. 721, 4/9 nat, size. Dentition nat. size. 



Plate XLII. 



A. Chrysichthys huttikoferi, juv., p. 723. 



B. Hemichromis tersquamatus, p. 717. 



Plate XLIIL 

 Chrysichthys persimilis, p. 727, 5/7 nat. size. 



Plate XLIV. 

 Chrysichthys camaronensis, p. 729, 1/3 nat. size. Dentition nat. size. 



Plate XLY. 



A. Chrysichthys kingsleycB, p. 728, 6/ 7 nat. size. 



B. Petersius occidentalis, p. 731, with enlarged views of anal fin of male and 



female, and of dentition. 



2. On a few Points in the Structure of Laborde^s Shark 

 {Euprotomicrus labordii) . By Robert O. Cunningham, 

 M.D., C.M.Z.S., Professor of Natural History, Queen^s 

 College, Belfast. 



[Eeceived April 28, 1899.] 



An individual of this curious and little-known Elasmobranch 

 having recently reached my liauds, I have drawn up a few notes 

 on its anatomy, which, though very imperfect and fragmentary, I 

 venture to submit to the Zoological Society of London. 



The specimen, which is a female, was, I am informed, one of 

 several obtained by Captain F. E. Patey, of the ship ' Mowwan,' 

 having been washed on board his vessel between 90° & 100° 

 "W. long, and in about the latitude of Cape Horn, and was 

 presented to our Museum in Queen's College through the 

 intervention of Mr. Adam T. Barklay of Belfast. As examples 

 previously met have been recorded as inhabiting the Indian Ocean, 

 the range of the species must be considerably more extensive than 

 was formerly supposed — a not surprising circumstance when the 

 wide distribution of many pelagic species of animals is taken into 

 account. Two causes have combined to render the following 

 description much less complete than I could have desired. In the 

 first place, I have not felt warranted to carry out the dissection to 

 such an extent as to render the specimen unavailable for Museum 

 purposes, and, secondly, the condition of the viscera was unfortu- 

 nately not such as to permit of detailed examination. 



In respect of size my example does not materially differ from those 



