.'{14 University of Calif ornia Publications in Zoology. [Vol.6 



PAGE 



Augaptilus pyramidalis n. sp. 334 



Bisseta maxima n. sp. 330 



Disseta sp. (Wolfenden) 331 



Euchaeta acuta var. pacifica n. var. - 324 



Kni'hurla diciiciisis 11. sp 323 



Euchaeta soli, in n. sp 324 



Euchirella propria n. sp 321 



Euchin lla rostrata ('Inns - 321 



Euchirella simplex a. sp - 320 



Euchirella truncata a. sp 322 



Gaidius tenuispinus S:irs 316 



Cm iiimi:< secundus a. sp - - 317 



Onchocalanus latus n. sp 326 



l\t run mi pt ihts li u chnii i Wolfenden 335 



Phyllopus integer n. sp 336 



I'U a rum, i in inn quadrungulata Dahl 329 



Scolecithrix angusta n. sp 328 



Scolecithrix vorax n. sp 327 



Undeuchaeta bispinosa a. sp 318 



/ mi, in In a in incisa a. sj> 319 



Xtintlitiriiltiiiiis pulcher a. sp 325 



A'i ml In,,; ilanui lirlns n. sp 324 



All the figures were drawn with the aid of a camera. 



Family CALANIDAE. 

 Genus Aetideopsis Sars. 



Aetideopsis, Sars I 1905), p. 159, supp. pis. 4. 5. 



F, n,,,ll, i. Wolfenden (1904), p. 117. tigs. 26, 27, 28. 



The genus resembles Aetideus Brady in that the rostrum is 

 heavy, strong and bifurcate, and the sides of the last thoracic 

 segment acutely produced. The main difference between the two 

 genera is that in Aetideopsis the fourth and fifth segments of 

 the thorax are separated at least by a distinct line. The pos- 

 terior maxillipeds are more slender in Aetideopsis than in A, fi- 

 ll, IIS. 



A i tideopsis also resembles Ghiridius Giesbrecht in the general 

 form of the appendages, but Chiridius has a weakly developed 

 rostrum and as in Aetideus the fourth and fifth thoracic seg- 

 ments are not visibly separated. 



