A EOYAL GIFT 29 



for a Scliizopod.' It is also said that ' this form ranks, 

 therefore, as the largest by far of all hitherto known 

 Schizopods,' although in truth an allied species in the 

 same genus, Gnatkophausia gigas, v. Willemoes Suhm, 

 obtained by the Challenger from a depth of 2,200 

 fathoms, measures 142 mm., or 5f inches. Both of these 

 species, with one or two others in the same genus, such as 

 GnathopJiausia Goliath, A. Milne-Edwards, far surpass 

 most of those in the sub-order, the length usually ranging 

 from half an inch to two inches. 



Of the Stomatopoda, some are no more than three- 

 quarters of an inch in length, but of the species Lysio- 

 sqidlla maculata (Fabricius), a male specimen, presented 

 to the naturalists of the Challenger by the King of 

 Amboina, fell short only by three- sixteenths of an inch 

 of measuring a whole foot. 



The Cumacea are a feeble folk. In some species the 

 slender frame, with trunk and tail and tail appendages all 

 told, does not exceed, or even equal, a tvvelfth of an inch. 

 Only the arctic Diastylis Goodsiri (Bell), occasionally yields 

 a Goliath of an inch and two-fifths. In the Isopoda there 

 is a far greater range of size. Within a single genus, 

 Eurycope mutica, Sars, which measures about one milli- 

 metre and a third, is contrasted with Eiirycope gigantea, 

 Sars, which reaches 33 millimetres, or about an inch 

 and a third. Anilocra gigantea (Herklots), measuring 

 three inches and a third, would seem a veritable monster 

 in this sub-order, were it not far surpassed by the ex- 

 tremely exceptional Bathynomus giganteus of Alphonse 

 Milne-Edw^ards, which is nine inches long by four inches 

 broad. ^ This prize was fished up by the United States 

 Survey steamer Blake, under the supervision of Alex. 

 Agassiz, from a depth of 955 fathoms, in the region of the 

 Gulf Stream, to the north-east of the bank of Yucatan 

 to the north of the Tortugas. Among the Amphipoda, 

 none yet discovered reach more than about half the dimen- 

 sions of this groat Isopod. At the other end of the scale 



' II mesure, en effet.pres de 0", 23 de long sur 0™ 10 de large. 



