26 Prof. M'lntosli's Nutes from the 



eyes [De St. Joseph). The general colour is brownish or 

 straw-colour. Posteriorly it terminates in a pygidium, 

 which has two eye-specks. The alimentary canal is straw- 

 yellow, is wide anteriorly, bulges here and there in its course, 

 and then narrows posteriorly. On each side of it is a red 

 blood-vessel. The body-cavity is filled with a vast number 

 of granular cells about g^Q of an inch in diameter. In 

 front of the eyes at the base of the branchial lobes is a 

 blood-sinus (branchial heart of Ehrenberg and Claparede), 

 and Langerhans counted 25 pulsations per minute. The 

 blood is stated to be red by Meczynikow and Claparede, 

 whereas De St. Joseph says it is green. 



The first segment is devoid of bristles, but the second has 

 a tuft on each side about the middle of the segment. The 

 bristles are few, simple, translucent forms with straight 

 shafts and finely tapered tips with narrow wings, and in some 

 views the tip is bent at a slight angle to the shaft. Eleven 

 segments are provided with them, the first and last having 

 none. As usual in the family, the posterior bristles have 

 the largest and most finely tapered tips. The minute 

 anterior hooks are about six in number in each segment, 

 have a comparatively large head, a constriction at the neck, 

 then a well-marked shoulder, after which the long curved 

 shaft tapers posteriorly. The main fang is large, and the 

 crown behind it is fiat with about four teeth. The organ is 

 a miniature representative of that of Chone. 



The last three bristled segments have, instead of the long 

 hooks of those in front, peculiar forms, the posterior outline 

 being incurved and the anterior slightly convex, whilst the 

 crown is long and minutely toothed, no difterentiation 

 occurring between the lowest and the adjoining teeth. 

 The base enlarges inferiorly, and is occasionally split, 

 apparently from the pressure used in preparing. 



Oria armandi is the ninth species, generally distributed in 

 the south. Claparede (1864) describes a ventral cephalic 

 collar to this species, apparently as distinguished from 

 Ampliicora fabricia, but so far as observed in the spirit- 

 preparations there is not much difference in this respect — 

 both presenting a conical ventral prolongation and a narrow 

 rim to the dorsal fissure, Claparede states that below the 

 collar is a row of vibratile cilia. Immediately in front of 

 the termination of the collar on the latero-dorsal region 

 is an eye-speck on each side. The second segment 

 bears an " auditory '•" organ (statocyst) on each side, viz. a 

 capsule M'ith a statolith. The brauchicC are in two groups 



