348 APPENDIX. 



as long as the first two segments ; while in another spe- 

 cimen nearly of the same size they are nearly equal in 

 length to the first four segments, and iu one or two 

 small specimens not a third the length of the two just 

 named. These cirri are equal in length to at least 

 eleven of the first segments of the body. The shorter 

 ones are only about half the length of the first segment 

 of the body. The feet are well developed, the supe- 

 rior branchial appendages are large and in the form of a 

 leaf, giving the animal at first sight the appearance of a 

 species of Phyllodon. The antennas are shorter than the 

 palpi, which are strong and conical in shape. Hob. 

 Esquimalt Harbour, Vancouver Island. (Brit. MILS. Col.} 

 This species approaches very nearly to Nereis virens 

 from Newfoundland (vide Middendorf, Sibirische Eeise 

 Anulos 6, tab. i., figs. 2-6). 



Nereis bicanaliculata. (Baird.) N. S. 



This is rather a small species, about 2 inches long, 

 and 1\ lines in breadth. It is of a dull white colour, 

 and is remarkable for having a channel running down 

 both the dorsal and ventral sides. The channel on the 

 dorsal surface is rather deep, commencing from the 

 eleventh ring, and continues to the tail ; the channel 

 itself is quite smooth, the divisions or rings of the body 

 not showing on its surface. On the ventral surface the 

 channel shows marks of the divisions or rings into 

 which the body is divided. The head is small, the 

 antennae about equal in length to the palpi, and the 

 tentacular cirri are equal to about five or six rings of 

 the body. The upper portion of the body is rounded, 



