164 The Arctic Eccpedition. 



jection of the indigestible portion of its food is effected by dila- 

 ting the whole body with water and then ejecting it. 



At the same time a small species of Clio, several Beroe, one 

 specimen of a free Actinia, and a very beautiful Crustacean^ form- 

 ing a new genus in the family Pontia and allied to Irencnis, were 

 obtained. The last is characterized by its large size, " the enor- 

 mous length of the four central tail-filaments, the inner of which 

 are not themselves armed with filaments, all the others being so ; 

 each of the antennse has a joint at the distal part of the first third, 

 thus enabling the animal to bend them and conceal them under 

 its body/^ 



On the second fine day a most interesting Ciliograde was ob- 

 tained of very peculiar form, and having the ciliated ribs trans- 

 verse instead of longitudinal ; the cilia arising from either edge 

 of the ribs. Mr. Goodsir thinks that its minute structure, which 

 is very complicated, proves its affinity to the DiphydcE and also 

 the Salp(je. All the Medusce obtained on these two days were 

 Ciliogrades. 



On the 23rd of June, having rounded Cape Farewell in a 

 heavy gale of wind on the preceding day, on entering Davis^ 

 Straits numerous beautiful Pteropoda of the genus Clio were ob- 

 tained in company with Spiratella. They were swimming ac- 

 tively in the water and were adorned with the brightest colours ; 

 only approaching the surface of the sea on calm evenings. The 

 observations made upon these animals have enabled Mr. Goodsir 

 to confirm the observations of Eschscholtz in most points. 



On the 25th numerous Medusce were seen, all of these of the fa- 

 mily Beroid(B and mostly of the species B. punctata of Eschscholtz. 

 On the 27th soundings were obtained in 41 fathoms and a dredge 

 put down, which produced, amongst many other interesting cap- 

 tures, a new species of Caprella, Amphipoda in great number, 

 several Asteriadce, a Terebratula and several other MoUusca, an 

 Isopod forming a new genus allied to Munna, a very beautiful 

 Ascidian, four species of fish — Cyclopterus, Liparis, Ammodytes, 

 and a beautiful species new to the observer. On the same day a 

 large shoal of the Caing whale [Phoccejia Melas) passed on their 

 way towards the south. 



On the 28th a dredge was sunk to the enormous depth of 

 300 fathoms, and produced many highly interesting species of 

 MoUusca, Crustacea, Asteriada, Spatangi and Corallines; such 

 as Fusus, Turritella, Venus, Dentalium, &c. ; and also some large 

 forms of Isopoda. As bearing upon the geographical distribution 

 of species, Mr. Goodsir considers the occurrence of Brissu^ lyrifer 

 (Forbes) and Alauna rostrata (Goodsir) as of the greatest in- 

 terest, both of them being natives of the Scottish seas. The 

 remarkable depth also appears to us to give peculiar interest to 



