Records of the Indian Museum. 



[Vol. XIIL 



pallida, Benedict. Choukof Island, Alaska. 



erosa , Benedict. Sannakh Island, Alaska. 



nebulosa, Benedict. Bering vSea, Alaska, etc. 



angulata, Benedict. Off Cape Johnson, Washington. 



bicuspida (Owen). Alaska, Bering vSea and Kara Sea. 



marmorata (Packard). Labrador. 



laticaiida, Benedict. vSan Francisco Ba^^ 



harfordi, Benedict. California. 



nodulosa (Kroyer). Arctic vSeas and Pacific Coast as 



far as British Columbia. 



laevis^ Benedict. Alaska and Bering Sea. 



consolidata (Stimpson). Pacific Grove, California. 



muricata (Harford). Arctic Ocean. 



^^ci;a, Benedict. Alaska and Bering Straits. 



ritteyi, Richardson. San Francisco, California. 



setifer, Barnard. vSouth Africa. 



Synidotca variegata, n. sp. 



(PI. I, figs. i-io). 



Body oblong-ovate, female rather wider than the male, dorsal 

 surface convex, almost smooth. Cephalon (fig. i) wider than long^ 

 narrowing posteriorly, frontal margin straight, posteriorly there is 

 a deep transverse furrow. Byes large and oval, situated in the 

 middle of the extreme lateral margins. Antennulae (fig. 2) with 

 the first joint expanded, second and third short and wide, sub- 

 equal; flagellum nearly two and a half times the length of the last 

 peduncular joint, setae in bunches. Antennae (fig. 3) first and 

 second joints .subequal, together equal to the third, fourth rather 

 longer and narrower, fifth half again as long as the fourth ; flagellum 

 composed of 21 joints and small apical style. First maxillae (fig. 

 4) with outer lobe terminating in 8 denticulate spines, inner lobe 

 terminally has 2 long setose spines and a small setule. Maxillipedes 

 (fig. 5) short and wide, palp 3-jointed, basal plate short but pro- 

 longed on the inner margin anteriorly, epipodite broad and excavate 

 on the posterior margin, distal inner lobe rounded terminally. 

 Segments of the mesosome (fig. 7) 2-4 subequal, 5-7 somewhat 

 shorter, pleural plates of first segment with anterior and posterior 

 angles rounded, in 2-4 anterior angle is produced forward a little 

 and posterior angle rounded, 5-7 truncate, coxal plates not present 

 on the dorsal side. In the middorsal line of segments 2-4 is an 

 arcuate depression towards the anterior margin (fig. 6). Thoracic 

 appendages 2-4 small and directed forwards, 5-8 larger and directed 

 backwards. Metasome (fig. 9) composed of a single segment with 

 narrow lateral sutures indicating a further coalesced segment, 

 terminal segment with straight lateral margins gradually narrowing 

 posteriorly, posterior margin bluntly rounded with small median 

 notch, dorsal surface very faintly keeled. Uropoda (fig. 10) with 

 lateral margins almost straight, excepting at the hinge, rounded 

 anteriorly and setose on the inner margin, on the outer posterior 



