130 R. 0. PUNNETT. 



contaiiniig muscle-fibrils. These glands become mucli smaller 

 posteriorly. 



Ill tlie muscular system tlie horizontal layer over the 

 mouth is well marked. There is no diagonal layer. 



The vascular system is of the regular type, except that 

 the head loop is replaced by a network of lacuiia3. 



The alimentary canal shows no special features. The 

 intestine commences about 6" 5 mm. from the tip of the snout. 

 Ventral gutter very small. 



The proboscis is missing. 



The genital sacs contain ova, which, however, are not 

 mature. 



The excretory system reaches forwards to the point 

 where the cerebral organ ends. It extends some way dor- 

 sally and ventrally to the level of the side stems, the tubules 

 of the opposite sides nearly meeting at places in the mid- 

 ventral line. The paired ducts open from the middle of the 

 system, and the position of the pores is somewhat dorsal. 



The nervous system is of the usual type. 



The cerebral organ is considerably elongated dorso- 

 ventrally (fig. 32, c.) owing to the large development of both 

 the dorsal and ventral glands. The dorsal lobe of the dorsal 

 ganglion ends before the organ starts, and the ventral lobe 

 becomes greatly diminished in size before entering into its 

 composition (fig. 32, d.). The head slits reach nearly to the 

 brain. 



The frontal organ is well developed. 



Eyes are not present. 



The head glands are very small, and rapidly merge into 

 the cutis glands. 



Cerebratulus bedfordii, n. sp. 



A single specimen of this species was obtained by Mr. 

 Bedford, with whose name I have much pleasure in associating 

 it. It was about 16 cm. long and 3 mm. broad, being rounded 

 in shape all through. The anterior end is sharply pointed. 

 The head slits are about 2"5 mm. long, and the mouth, which 



