20 G. O. SARS. [SEC. ARC. EXP. FRAM 



83. Zaus abbreviates, G. 0. SARS. 



This form, as yet only known from the Norwegian coast, was 

 found occasionally together with the preceding species. 



84. Zaus Goodsiri, BRADY. 



Two specimens only of this large and distinct species were found. 



Fam. Porcellidiidse. 



85. Porcellidium fimbriatum, GLAUS. 



A solitary specimen of this easily recognisable form was found in 

 a bottle of specimens taken on July 9, 1901. 



Fam. Idyidae. 



86. Psamathe Arthur! (POPPE). 



(PI. II, figs. 7-11). 



Stutellidium Arthuri, POPPE, 1. c. p. 291, PI. XXI, figs. 1-4, PI. XXII. 

 figs. 1-12. 



Specific Characters. - Female. Anterior division of body 

 broad and depressed, with the lateral parts of the segments lamellarly 

 expanded and angular behind. Cephalic segment about the length of 

 the 4 succeeding segments combined, rostral projection broad and 

 lamellar, obtusely truncated at the end. Penultimate segment of meta- 

 some scarcely narrower than the preceding ones, and having the hind 

 edge almost straight. Last pedigerous segment, as in the type species, 

 very small and firmly connected with the 1st caudal segment. Uro- 

 some comparatively shorter than in the type species, being scarcely 

 more than J /a as l n g as the anterior division, genital segment some- 

 what dilated and much larger than the others. Caudal setae slender 

 and elongated, the innermost but one almost as long as the whole body. 

 Anterior antennae resembling in structure those in P. longicauda, the 

 terminal part tapering abruptly, with the last 2 joints narrow linear 

 in form. Posterior antennae and oral parts exhibiting the structure 

 characteristic of the genus. 1st pair of legs almost exactly as in the 

 type species. Natatory legs likewise very similar. Last pair of legs, 

 however, differing more conspicuously, the distal joint being compara- 

 tively shorter and less densely setous on the edge, tip obliquely 

 truncated. 



Length of adult female 1.32 mm. 



