REPORT ON THE AMPHIPODA. 1503 



Telson coalesced with the preceding segment, about as broad as long, narrowing to 

 the rounded apex. 



Length, — In the slightly bent position, which is probably natural to the animal, the 

 specimen measured scarcely more than one-tenth of an inch. 



Locality. — June 13, 1874, east of Australia; lat. 34° 13' S., long. 151° 38' E. ; 

 surface to 50 fathoms; surface temperature, 61°'8. One specimen, female. 



Remarks. — From the specimen of Parascelus parvus which Claus describes from 

 the Atlantic Ocean, the Challenger specimen differs by having the hinder apex of the 

 wrist in the gnathopods smooth, instead of weakly crenulate, as well as by rather 

 different relative lengths of the joints in the lower antennae and the fourth and fifth 

 perseopods. 



Genus Schizoscelus, Claus, 1879. 



1879. Schizoscelus, Claus, Die Gattungen und Arten der Platysceliden, pp. 17, 20. 



1886. „ Gerstaecker, Bronn's Klassen und Ordnungen, Bd. v. Abth. ii. p. 484. 



1887. „ Bovallius, Systematical List of Amph. Hyper., Bihang till K. Svensk. 



Vetensk.-Akad. Handl., Bd. 11, No. 16, p. 44. 

 1887. „ Claus, Die Platysceliden, pp. 42, 43. 



For the shorter definition given by Claus, see Note on Claus, 1879 (p. 491). The 

 fuller definition is to the following effect : — 



" Perseon broad and round, with comparatively thin produced pleon. Mouth-organs 

 outdrawn beak-like. The two terminal joints of the lower male antennas nearly as long- 

 as the preceding. A packet of gland-cells with cuticular longitudinal ducts in the first 

 joint of the first and second perseopods. Tfie first gnathopods simple, the second 

 complexly chelate. TJie laminar first joint of the fourth per&opods with long, 

 halj-sickle-shaped slit. The other joints of the limb (Beinanhang), attached almost at 

 the distal end of the laminar joint. Fifth peraaopods completely developed. The 

 rami of the uropods widened fin-like. The inner ramus of the second pair especially 

 enlarged." 



Bovallius includes in this genus the Typhis rapax of Milne-Edwards, 1830, but 

 many of the expressions used by Mdne-Edwards in describing that species in his later 

 work are opposed to such an identification. He says that it is of a more elongate form 

 than Typhis ferns, that the first gnathopods have a large hand, that the second 

 gnathopods have a very large claw, and that the laminar first joint of the fourth 

 perseopods is not so developed as that of the third. By these characters, which are ill- 

 suited to Schizoscelus, he is probably pointing to one of the Pronoidse. 



