286 BEPORT 1868. 



the following joints; nails strong, scimitar-shaped, the entire limbs 

 almost naked (having only a very few short setas upon them) . Length 

 one-fifth of an inch. A single female dredged in 100-110 fathoms, 

 twenty-five miles N. by "W. from Burrafirth Lighthouse, in 1867. The 

 specimen is imperfect, having lost antenna), &c. The sixth and seventh 

 segments of the pereion appear to be coalesced. It approaches Lcetma- 

 tophilus tuberculatus of Bruzelius, but is much more strongly tubercu- 

 lated, and the gnathopods of different structure, the first smaller, the 

 second larger, the hand broader, and the basos spined. 



Unciola planipes, Norman, Nat. Hist. Trans, of Northumberland and Durham, 

 vol. i. (1865) p. 14, pi. vii. figs. 9-13. Balta Sound, 5-7 fathoms. Many 

 specimens. 



Corophium longicorne (Eabricius). " Some specimens, which we take to be 

 the young of this species, we find in the collection sent to us by the 

 Rev. A. M. Norman, taken in from two to five fathoms, in Outer Sker- 

 ries Harbour, Shetlands" (B. and W.). 



crassicorne, Bruzelius, the male, = Corophium Bonellii, Bate & AVestw. 



Brit. Sessile-eyed Crust, vol. i. p. 497 (? Corophium Bonellii, M.-Ed- 

 wards), the female. Very abundant, in 2-5 fathoms, Out Skerries Har- 

 bour. The C. Bonellii of Bate and Westwood is unquestionably the 

 female of C. crassicorne ; the female of C. longicorne (which B. and "W. 

 thought C. Bonellii might be) is quite different. 



tenuicorne, n. sp. Two females, dredged in St. Magnus Bay, resem- 

 bling in general characters the same sex of longicorne and crassi- 

 corne, but distinguished as follows. Superior antennas slender, longer 

 than the inferior ; first joint cylindrical (not expanded), peduncle with 

 two or three spines on inner edge ; second joint longer than first, slender, 

 third not half as long as second; filament composed of six long joints, 

 the terminal one bearing a number of long tentaculiform setas. Inferior 

 antennas with penultimate joint of peduncle cylindrical (not expanded), 

 inner edge with two or three articulated spines about the centre, and a 

 single long, slender, articulated spine at the distal termination; last 

 joint about two-thirds as long as the penultimate, bearing two spines on 

 the middle of the inner side ; filament unusually pediform, consisting of 

 a long, stout articulation (more than half as long as the last joint of the 

 peduncle) and a strong terminal nail. Finger of gnathopods biclentate 

 at the apex. Nail of pcreiopods longer than carpus and propodos com- 

 bined. First and second uropods terminating in long slender spines, 

 which are more than half as long as their rami ; last uropods having the 

 branch longer than its peduncle, not wide, three times as long as broad, 

 tipped with long setse, but having no setas on the inner and outer mar- 

 gins. Length about one-fifth of an inch. The specimens procured are 

 females laden with eggs ; the male is unknown to me. 



Hyperia galba (Montagu), Bate & West. Brit. Sessile-eyed Crust, vol. ii. 

 p. 12, the female, = Lestrigonus Kinahani, Bate & AVestw. 1. c. p. 8, 

 the male, =? Lestrigonus exulans, I.e. p. 5, the young male,=? Hypcria 

 medusarum, Bate, Cat. Amphip. Crust. Brit. Mus. p. 295, pi. xlix. fig. 1, 

 the young female (but not Metoecus .medusarum, Ero'yer). In Aurelia, 

 open sea, twenty-five miles N. by . w! of Unst. 



I believe that the above four so-called species are the different sexes 

 and periods of growth of one. The specific points will be found in the 

 structure of the gnathopods (as accurately described by B. and W. under 

 Lestrigonus exulans} and of the uropods, which have the rami of all three 



