282 



THE VOYAGE OF H.M.S. CHALLENGER. 



inch in length. Five pairs of feet equally developed ; all five-jointed ; all with the 

 penultimate joint large and ovate. Thii-d and fom-th segments each furnished -with a single 

 small oval appendage." " It was attached to one of two specimens of Hyperoodon hidens, 

 the capture of which in Portland Roads was recorded in the ' Annals of Nat. Hist.' for 

 November 1854." This sjjecies has since been made the type of a new genus, Platijcyamus, 

 Liitken. See Note on Liitken, 1873. 

 At page 307, in the " Fam. Corophiad^," Unciola irrorata, Say, is recorded from Weymouth. 



1855. GOSSE, P. H. 



A Manual of Marine Zoology for the BritisK Isles. Part I. London, mdccclv. 



In 



These are divided into 



Losmodipoda. 



Isopoda. 

 Amphipoda." 



Subkingdom III. Annulosa," Gosse places " Class TV. Crustacea." 

 two sections : — 



" Mouth prolonged into a sucker, ..... Thelastia. 



" Mouth armed with jaws, ...... Dadia." 



The first section includes the Pycnogonids and other families. " Section II. Dactia," is divided 

 into three orders, Eiifomostraca, I^dnojiJitJiahna, Podophthalma. The Edriophthalma are 

 distinguished from the other two by the following characters : — " The modified legs per- 

 forming the office of giUs ; eyes sessile, immoveable ; thoracic feet for walking, usually seven 

 pairs ; no carapace." It is thus subdivided : — 

 "Abdomen a rudimentaiy tubercle, without distinct members. Branchial 



vesicles suspended from the thorax, . . . 



" Abdomen well developed, and provided with five or six pairs of members. 



" Branchial vesicles almost always absent from the thorax. First 



five pairs of abdominal members almost of the same form, un- 



suited to locomotion, and apparently serving as gUls, . 



"Branchial vesicles under thorax. First five pairs of abdominal 



members diversely formed, and serving for locomotion, 



To " Suborder I. — Lcemodipoda," he assigns " Caprella (Lamk.). Body lengthened, slender, 



cylindrical ; both pairs of antennje well-developed ; feet long, but wanting on the second 



and third segments of the thorax," with the species linearis (fig. 223), Ixvis, acuminifera, 



acutifrons, phasma, tubercidata, lobata, acaiithifera, longispina ; " Leptomera (G aerin). 



As Caprella, but aU the segments of the thorax fui-nished with feet," with the species 



pedafa (fig. 224) ; and " Cyamiis (Lamk.)," with the species erraticus, ovalis, gracilis, 



Thojnpsmd (fig. 225). His "L. pedata " can be recognised from the figure as Proto ventri- 



cosa, but the figure of C. linearis is useless. No authorities are mentioned for the species, 



nor are any descriptions given. 



" Sub-Order III. Amphipoda " is thus subdivided : — 



" Fourth and fifth abdominal segments united ; fourth and fifth abdominal ap- 

 pendages dissimilar, ....... 



" Abdominal segments distinct ; abdominal appendages similar. 



" Foot-jaws covering only the bases of the preceding appendages, 



and forming a lip with thi-ee plates, but deprived of palps, 



" Foot-jaws very large, covering the whole mouth, and forming a Up 



terminated by four great horny plates and two very long palps, . 



In the first Tribe, the Cheluracea, stands, as might be expected, only Chelura terebrans, PhUippi 



(fig. 250). In " Tribe 11. Hypbriacea," he places " Hype^ia (Latr.). Second pair of 



antennse style-shaped and unfolded ; body inflated. H. Latreillei. Fig. 251 ; n. s. [H.] 



galba," and, " Typilds (Risso). Second antennae folding on themselves so as to form three 



Chehiracea. 



Hyperiacea. 



Gammaracea." 



