

REPORT ON THE AMPHIPODA. 1633 



" Male. Body very slender ; segments elongate, second thoracic segment more than one-half 

 longer than the first, and very slender. No spine on dorsal surface of head. Superior 

 antennae longer than half the hody ; first joint little more than half the length of second ; 

 third joint nearly as long as second ; flagellum rather longer than basal joint. Inferior 

 antennae reaching to about the first third of the second joint of the superior antennae. Hand 

 of second pair of legs very narrow, with three teeth on the underside, one a short distance 

 behind the claw, a second close to the first, and a third posterior to the middle. The third 

 and fourth segments have a sharp spiine on each side, above the branchias and near the 

 hinder margin, and the three posterior segments are furnished with similar spines. 



"Length of body, 1 11-16 inch. Length of superior antennas, about 1 inch. 



" Female. Body less elongated than in the male ; third and fourth segments swollen at the 

 sides, and both these segments armed with a long, sharp spine, the point curving towards 

 the head ; fifth and sixth segments armed with a straight spine. Second pair of legs about 

 as long as the second segment of the body, the basal joint armed with a sharp spine on the 

 upper side of distal end ; hand shorter than basal joint, with a single acute tooth on the 

 posterior third of the under side. Superior antennas about half the length of the body, the 

 second joint about one-third longer than the basal ; flagellum as long as second joint. 

 Inferior antennae about equal in length to the first two joints of the superior antennas. 



" Length of body, about 1 7-16 inch ; of superior antennas, f inch." 



In the preliminary observations Mr. Lockington observes that " the male somewhat resembles 

 the C. attenuata of Dana, the chief differences being the spines upon the five posterior seg- 

 ments, and the absence of the spine upon the head." He further says, " The females differ 

 so greatly from the males in the comparative lengths of the several joints of the body and 

 antennae, that I was at first inclined to believe they belonged to another species ; but since 

 the two forms were always dredged in company, and the specimens of one form are all 

 nudes while those of the other are all females, it is evident that they are the two sexes of 

 the same species." 



Already (p. 1259) I have suggested that Mr. Lockington's species might be the same as Caprella 

 scaura, Templeton, of which Dana's Caprella attenuata is a synonym, and now that I have 

 seen Mr. Lockington's descriptions and figures, little doubt remains in my mind that Caprella 

 spinosa should be added to the synonymy of Caprella scaura. In regard, however, to the 

 " long, sharp spine, the point curving towards the head," which Mr. Lockington figures on 

 each side of the third and fourth segments of the female, it is reasonable to suspect some 

 misapprehension, since, in regard to the branchial vesicles of these two segments in the 

 Caprellx, he says, " in the females these branchiae are modified in form and function, 

 becoming four broad plates," to form the marsupial sac. It is probable, therefore, that, as 

 he considered the marsupial plates to be modified branchiae, he regarded the actual 

 branchiae as spinous processes. 



1875. LtJTKEN, CHR. Fr. 



The Crustacea of Greenland. In Manual of the Natural History, Geology, and 

 Physics of Greenland and the neighbouring regions ; prepared for the use of the 

 Arctic Expedition of 1875, under the direction of the Arctic Committee of the 

 Royal Society, and edited by Professor T. Rupert Jones, F.R.S. London, 1875. 

 pp. 146-165. 



It is stated that " this list is chiefly a revised copy of that given by Prof. Bernhardt in Rink's 

 ' Greenland,' containing the corrections and additions published of late years." " The 



(ZOOL. CHALL. EXP. — PART LXVH. 1888.) XxX 205 



