698 THE VOYAGE OF H.M.S. CHALLENGER. 



Telson. — Broad at base, tapering to a rounded end, without suture or emargination ; 

 on either side of the apex there is a long cilium, and a very short one on either side 

 higher up. 



Length less than three-twentieths of an inch. 



Locality. — Station 149d, Eoyal Sound, Kerguelen, January 20, 1874; depth, 28 

 fathoms ; bottom, volcanic mud. One specimen. 



Remarks. — The colour of the specimen in spirit was greyish. The Challenger species 

 diifers from Boeck's Ambasia daaielssenii by having the inner plate of the first maxillae 

 moderately large, the first joint of the flagellum of the upper antennae but little longer 

 than the second, the fourth pleon-segment without a dorsal depression, and the telson 

 not cleft. The specific name integricauda is intended to call attention to this last- 

 mentioned circumstance. 



Genus Amaryllis, Haswell, 1880. 



1880. Amaryllis, Haswell, On Australian Amphipoda, Proc. Linn. Soc. N.S.W., vol. iv. p. 253. 

 1882. Amaryllis, Haswell, Catalogue of the Australian Stalk and Sessile-eyed Crustacea, p. 227. 



Mr. Haswell's definition is as follows : — 



" Superior antennte with a well-developed appendage. Mandibles with a palp. 

 Maxillipedes with well-developed squamiform plates. Anterior gnathopoda subpediform. 

 Posterior gnathopoda imperfectly subchelate. Eami of the fourth and fifth pleopoda 

 styliform ; those of sixth pair broad, lanceolate. Telson squamiform, cleft." 



He places it in the subfamily Stegocephalides of the British Museum Catalogue, the 

 definition of which he gives in Spence Bate's words :^ 



" Superior and inferior antennae subequal. Coxae of the second pair of gnathopoda 

 and of the first and second pairs of pereiopoda monstrously developed ; second ])im 

 broader than the preceding. Pereiopoda subequal. Last three pairs of pleopoda styliform. 

 Telson single." 



From the Stegocephalides of Spence Bate, however, Amaryllis differs in having only 

 the coxae or side-plates of the second peraeopods monstrously developed, and in having a 

 well-developed secondary appendage on the upper antennae, while the genera assigned to 

 the Stegocephalides have none or only a rudimentary one. 



From the Stegocephaliuas of Boeck Amaryllis is separated by having a three-jointed 

 palp on the mandibles and by not having a palp on the first maxillae, as well as by other 

 characters. It can better stand among the Lysianassidae. In the definition which Boeck 

 gives of his subfamily Lysianassinae, it will be necessary, with a view to this genus, and 

 in a less degree with a view to Boeck's own genus Aristias, to prefix the word 2)lcrumque 

 to the epithet perimrvo applied to the second and third joints of the peduncle of the 



