78 BRITISH TUNIC ATA. 



and delicate ; the primary vessels vary in size, seven 

 or eight being much larger than the rest, and having 

 between them usually two or three small ones ; the 

 secondary vessels are delicate. The longitudinal rods 

 or bars are very narrow ; there are six or seven on 

 each fold and three or four between them. The oral 

 lamina is narrow, but widens a little downwards. The 

 branchial tubercle is lars'e and strongly convoluted : it 



<_ ) d 



is placed diagonally with the convolutions inclined 

 backwards and downwards. 



The alimentary tube (PI. XXXI, fig. 2) forms a 

 deep, narrow loop placed across the lower portion of 

 the pallia! sac ; the stomach is ill-defined, and the 

 whole track is much obscured by the reproductive 

 organs and the liver (PL XXXI, fig. 2), which latter 

 is of a pale greenish colour, and composed of three 

 lobulated masses attached to the left side of the oeso- 

 phagus and stomach. 



The reproductive organs (PI. XXXI, fig. 2) are 

 irregular lobulated masses ; that on the left side is 

 more consolidated than the other, and is somewhat 

 transversely elongated ; the right-hand organ is com- 

 posed of several masses which encumber the looped 

 portion of the intestine. The oviduct and vas cleferens 

 leave the ventral margins of the organs side by side ; 

 thev are short tubes, the oviduct is the wider of the 



/ 



two, and both pass a little upwards and forwards to 

 the base of the excurreut tube, the intestine lying 

 between the two sets of tubes, but at some little 

 distance from them. 



2. Cynthia claudicans Savigny. 



(PI. XXX, figs. 1 and 2 ; PI. XXXI, fio- s . 3-5 ; PI. XL, 

 fig. 6 ; PL XL VIII, fig. 4 ; and fig^ 51 in text.) 



Cynthia eland leans SAVIGNY [in Descr. Egypt., Hist. Xat. I 

 (1809), pt, 3, p. 39, and] Mem. Anim. sans Vert, [pt, 2 

 (1816),] pp. 90, 150, pi. ii, fig. \ (2) ; [? THOMPSON in Ann. 

 Nat. Hist. (I) V (1840), p. 95;] FORBES & HANLEY Brit, 



