ASTEROCHERID.E. 105 



spine of the inner branch, are all large and broadly dagger- 

 shaped, and, with the exception of the long apical spine of 

 the outer branch, have both edges finely serrated, but the 

 long spine referred to is serrated only on the outer edge. 

 The first two joints of the outer branch have each one seta, 

 and the third joint four on the outer margin : but, on the 

 other hand, while the first joint of the inner branch bears 

 one seta on the inner edge, the second and third joints have 

 each two, and a similar seta also springs from a notch near 

 the middle of the outer edge of the third joint, as shown in 

 the drawing (PL XX. fig. 8). 



The fifth pair are very small, and they each consist of two 

 joints ; a single seta springs from the outer distal angle of 

 the basal joint, but the second joint, which is subrotundate in 

 form, bears t\vo or three setae (PI. XI. fig. 10). 



Habitat. Plymouth Sound. A single specimen of this 

 species occurred in a gathering collected on August 12th, 

 1903. The species appears to be parasitic. . 



BKADTPONTIUS MAGNICEPS (Brady). 



1880. Artotrogus mayniceps, Brady, vol. iii. p. 61, pi. xciii. figs. 1-9. 

 1899. Bradypontius maqniceps, Giesbreclit, Die Asterockerideii, 

 pp. 27, 29, 88, 108, pi.' vi. figs. 41-44. 



A solitary specimen was captured near Duke Buoy, Ply- 

 mouth, in July 1889. The species appears to be sparingly 

 though fairly widely distributed. 



DYSPONTIUS STRIATUS, Thorell. 



1859. Dyspontius striatus, Thorell, Oni Krustaceer af Slagtet 



Ascidia, p. 81, pi. xiv. fig. 22. 



1880. Dyspontius striatus, Brady, vol. iii. p. 66, pi. xcii. figs. 1-13. 

 1899. Di/spontius striatus, Giesbrecht, Die Asteroeheriden, pp. 33, 



35, 90, 109, pis. i. fig. 10; vii. figs. 1-11 ; x. figs. 27, 36. 



Amongst some dredged material from Salcombe, collected 

 June 30th, 1875 ; in a small gathering from the mouth of the 

 River Yealm in 1889 ; and in another from three miles N.W. 

 of Eddystone Lighthouse, August 31st, 1903. Very few 

 specimens were observed. 



CALIGIDIUM VAGABUNDUM, Glaus. 



1889. Cuh'ffidium vagabundum, Clans, " Halfparasitische Copepodeu," 

 Arbeit, zool. Inst. Wien, vol. viii. p. 362, pi. i. figs. 1-7. 



A single specimen in a gathering collected at the mouth of 

 the River Yealm in August 1889. 



o 2 



