74 DR. W. E. COLLINGE ON THE 



more than two and a bait times the length of the basipodite : the first joint 

 is small, the second very long, and the third smaller and more or less oval. 

 Seta? spinous. The inner distal lobe extends forward as far as the middle 

 of the second joint of the palp and lias the usual setose and plain spines 

 terminally. The epipodite is somewhat cone-shaped, very short, wider than 

 the basipodite, and has its posterior margin excavate. 



3. (Jhiridotea ttjftsii (Stimpson). (PI. 7. fig. 2.) 



Idotea tuftsii, Stimpson, Smithsonian Contrib. to Knowledge, vol. vi. (1853) p. 39 ; 



Harger & Verrill, Rept. U.S. Comms. F. & F. 1873, pt. i. pp. 340 & 569. 

 (Jhiridotea tuftsii, Harger, Amer. Journ. Sci. vol. xv. (1878) p. 374; Rept. U.S. Comrus. 



F. & F. 1880, pt. vi. p. 340, pi. 4. figs. 20-23. 

 Glyptonotus tuftsii, Miers, Journ. Linn. Soc, Zool. vol. xvi. (1881) p. 18. 

 Chiridotea tuftsii, Riohardson, Bulb No. 54, U.S. Nat. Mus. 1905, p. 354, figs. 382, 383. 



'1 he Maxillipede (PL 7. fig. 2). — The single specimen I have examined 

 does not at all agree with either Harper's or Richardson's figures. I have 

 no reason to doubt the identification of the species which was obtained at 

 (Jape Cod Bay, U.S.A. , in 1879. A reference to the figure shows that in 

 this specimen, whilst preserving most of the characters typical of Chiridotea, 

 there are four joints in the palp. 



Mesidotea, Richardson. 



i. Mesidotea sabini (Kroyer). (PI. 7. figs. 3-5.) 



Idotea sabini, Kroyer, Nat. Tidsskr. vol. ii. (1846-49) (s. 2) p. 401; C4. O. Sars, Arch. 



f. Math, og Naturvidensk. vol. ii. (1877) p. 350. 

 Glyptonotus sabini, Miers, Journ. Linn. Soc, Zool. vol. xvi. (1881) p. 15, pl. 1. 



tigs. 3-5 ; Richardson, Proc. U.S. Nat. Mus. vol. xxi. (1899) p. 844. 

 Chiridotea sabini, Stebbing, Ann. & Mag. Nat. Hist. (s. 7) vol. iv. (1899) p: 263. 

 Mesidotea sabini, Richardson, Bull. No. 54, U.S. Nat. Mus. 1905, p. 350, figs. 377-379. 



Kroyer figures both of the maxillse and the maxillipedes, the former, how- 

 ever, bear little or no resemblance to the actual form. In the first maxilla 

 he shows an outer lobe with eight spines and an inner one with four, whilst 

 in the second maxilla the two outer lobes are shown with four spines on each 

 and a series of bluntly ending ones on the inner lobe. The maxillipede in 

 his lower figure is fairly correct, but wrong in the upper one. 



The First Maxilla (PI. 7. fig. 3). — The outer lobe terminates in eleven 

 spines, most of which are stout, and there are numerous setse on the outer 

 margin of the lobe, which extend downwards for some distance. The inner 

 lobe terminates in two long setose spines and a small curved setule on the 

 outer ventral border. 



The Second Maxilla (PI. 7. fig. i). — The two outer lobes terminate in six 



