On Indian Drep-sea Dredging. 225 



EXPLANATION OF PLATJ-: X. 



Fiff. 1. Bifid ctirthworiTi, imturni size, in spix-it. 



Fit/. 2. Kiilnrf.'1'd drinviii^' of so;.'im'nts 54 ^.c, sliowiug tlie bifurcation. 



Fit/. '.\ shows tlu>.l)itid ronditiun of tho dorsal vessel and gut. 



Fi(/. 4. Drawing sliowiiig the relation of the nerve-cords in the two 



npnendages and anterior trunk to each other. 

 Bihu supraneural vessel lying above tlie 



Fit/. 5. Bihd supraneural vessel lying above tlie nerve-cords. 

 Fi//. G. ]h'a>^'ing showing position of the vesicula) seniinales. 

 Fit/. 7 shows bitid nature of dorsal vessel, gut, supraneural vessel, and 



nerve-cord. The gut has been drawn to one side to expose the 



nerve-cord. 

 Fit/.f. 8 & i*. Copies of Robertson's drawings of earthworm described by 



him. 



E.vplan(ition of letters used. 



a. Left nerve-cord in anterior at. Anterior trunk, 



trunk. tlv. Dorsal vessel. 



/). ili^rlit nerve-cord in anterior //. Gut. 



trunk. h. Heart. 



c. lieft nerve-cord in left ap- la. Left appendage, 



pendage. nc. Nerve-cord. 



tl. Right nerve-cord in left ap- ra. liight appendage, 



pendage. s. Septum. 



e. Left nerve-cord in right ap- sn. Supraneural vessel, 



pendage. vs. Vesicula semiualis. 



/. liight nerve-cord in right ap- 

 pendage. 



XXV. — Natural History Notes from IT.M. Indian Marine 

 Survey Steamer ' Investigator^^ Commander R. F. Hoskyn^ 

 li.N., commanding. — Series II., No. 1. On the Results of 

 Beep-sea Dredging during the Season 1890-91 {continued). 

 By A. Alcock, M.B., Surgeon-Captain I.M.S., Superin- 

 tendent of tlie Indian Museum. 



[Continued from vol. xi. p. 172.] 



Of the species to be described in the sequel some liavc 

 already been figured in the " Illustrations ot the Zoology of 

 H.]\l. I. M.S. 'Investigator,' Crustaceans," part i., published 

 in 1892, and some in part ii. of the same publication, which 

 1 hope will be issued early this year. All the new species 

 not yet figured will, I hope, appear in part iii. of the ' Illus- 

 trations,'' which is now in preparation and may be expected 

 early next year (1895). 



