222 THE ROUGH SYRINX. 



and I therefore have no data for comparison derived 

 from personal observation, Professor Forbes gives its 

 length as ranging from six to eight inches. My speci- 

 men, however, measured eleven inches in length, 

 though the posterior extremity was contracted and the 

 proboscis was but little everted, so that under other 

 circumstances its length would certainly have exceeded 

 a foot. The measurement was made, too, when the 

 animal was at perfect rest, and not elongated by 

 crawling. Its thickness was just fths of an inch, 

 uniformly cylindrical, without any noticeable contrac- 

 tions or enlargements, except the swelling of the tail, 

 and the diminution to form the proboscis. 



The surface of the body can scarcely be called 

 rough; for though it is reticulated, the skin is deli- 

 cately smooth, glossy, and iridescent. The reticula- 

 tions are produced by longitudinal and transverse 

 lines, the former about yoth, the latter |th of an inch 

 apart, very reguhir. Both series are indented striffi, 

 becoming evanescent by being pressed out, when the 

 body is swollen or bent. The hinder extremity, for 

 about an inch, is nearly smooth, forming a swollen 

 oval sac, the furrows of both series being lost on its 

 upper half in irregular corrugations. This part is 

 pearly white, but the whole body besides is of a dull 

 greyish buff, the skin reflecting opaline tints. 



The anterior extremity is suddenly diminished into 

 a proboscis of about half the diameter of the body, 

 which is capable of being concealed within the body, 

 or protruded by being turned inside out like a stocking. 

 Prof. Forbes says its surface is minutely granulated, 

 but this expression does not convey a correct idea of 



