Prof. A. Wrzesniowski on a new Species 0/ Callisoma. 15 



scarcely perceptible indentation ; while in the female the large 

 bulge of the thigh is contracted rather suddenly by a forward 

 curve. 



It remains only to notice that the sixth pair of legs are 

 rather longer than the fifth and seventh pairs, and that the 

 lobe of the head on which the eyes are situated is not curvi- 

 linear, but angular, and has a slight incision below it. These 

 details, as well as the elevation of the fourth segment of the 

 pleon, are common to both sexes. For other points the reader 

 may be referred to the standard authorities. 



EXPLANATION OF THE PLATES. 

 Plate I. 



Fig. 1. LiljeborgiaNormanni. la. First gnathopod. lb. Second gnath- 

 opod. 1 c. Terminal segments of pleon, seen from above. 



Fig. 2. Microdeuteropus versiculatus, male. 2 a. First gnathopod, with 

 the hand twisted and foreshortened, more enlarged than the fol- 

 lowing figure. 2 b. First and second gnathopods of another 

 specimen. 2 c. Second gnathopod of the same, seen from the 

 opposite side. 2d. First gnathopod of female. 2e. Second 

 gnathopod of female. 2/. Hairs of second gnathopods. 



Plate II. 



Fig. 3. GammareUa brevicaudata (G. Kormanni) female. 3 a. First 

 gnathopod. 36. Second gnathopod. 3 c. First and second 

 gnathopods of male. 3 d. Second gnathopod of another speci- 

 men, with a shorter finger. 3 e. Maxilliped. Sf. Length of 

 male. 3 g. Length of female. 



Fig. 4. Iphimedia Eblance, variety. 



Fig. 5. Microprotopus macidatus, male. 5 a. First gnathopod. 5 b. 

 Second gnathopod. 



III. — On Callisoma Branickii, a new Species from Nice. 

 By Augustus Wrzesniowski, Professor of Zoology in 

 the Warsaw University. 



To the Editors of the Annals and Magazine of Natural History. 



Gentlemen, 



You would greatly oblige me by publishing in your valuable 

 Journal, as soon as possible, a brief description of a new species 

 of the Amphipodous genus Callisoma, Costa. 



I am, Gentlemen, Yours truly, 



Warsaw, May 28, 1874. A. WRZESNIOWSKI. 



Callisoma Branickii, n. sp. 

 The head small ; the eyes compound, elliptic. Inferior 



