860 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



these are most evident in the groups of glands lying on 

 the posterior margin of the last three abdominal segments. 

 Each gland consists of a single large cell, with a deeply 

 stained nucleus of considerable size, surrounded by granu- 

 lar protoplasm, and is provided with a chitinous duct, 

 which apparently opens on to the exterior. In animals 

 which had been fed on carmine, granules of that substance 

 were present in the protoplasm of the gland cells. They 

 appear to be similar to those described by Nebeski (14) in 

 the Corophiidas, but, unlike the latter, they have no ducts 

 running down to the dactylopodite. Similar unicellular 

 glands are present in the setigerous plates of cuticle found 

 on the floor of the stomach. Globules of the coloured oil 

 are present in the blood of the creature, and increase in 

 number when it has been kept in captivity for some time, 

 the patches of unicellular glands becoming at the same 

 time less noticeable, owing to their comparative freedom 

 from oil. 



Reproductive Organs and Life History. 



As already stated, the sexes are separate. In both, 

 the reproductive organs are paired straight cylindrical 

 tubes, surrounded by adipose tissue, lying dorsally upon 

 the gut, below the heart (PI. II., gon). 



In the male, they extend from the second to the 

 seventh segment of the thorax. The vasa deferentia (PI. 

 II., g.d.) are straight tubes arising from their ends, in the 

 seventh segment, and passing down the sides of the body, 

 close to the body-wall, to the inner side of the basal joint 

 of the last pair of thoracic legs or peraeopods, where they 

 open on a pair of small tubercles. Each tubercle is 

 supplied with a strong musculature, and forms an 

 external penis. The testis proper extends from the end 



