322 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



Aricidea jeffreysii (Mcintosh) 1879 



Scolecolepis (?) jeffreysii Mcintosh, 1879, pp. 506-507, figs. 13, 14. 



This species comes originally from Davis Strait, western Greenland, 

 in 20 fathoms from shelly sand. It was briefly described and diagnosed 

 as follows: Branchiae present from the fourth setigerous segment, after 

 which they are large on 8 segments, diminish to the fifteenth, and are 

 absent after the eighteenth one, thus numbering 15 pairs. Postbranchial 

 segments have a long filiform postsetal notopodial lobe (Mcintosh, 

 1879, fig. 14) ; other characteristics were not defined. 



Aricidea jeffreysii, sensu Cerruti (1909, pp. 469-493, pis. 18, 19), 

 is based on collections from the Gulf of Naples, Mediterranean Sea, and 

 is thus perhaps not the same species. In posterior neuropodia these indi- 

 viduals have uncini with a rounded hood (pi. 43, fig. 2). Southern 

 (1914, pp. 93-94) and Fauvel (1927a, p. 75, fig. 25 a-e) have added 

 to the descriptions, based perhaps on other species ; Berkeley and Berk- 

 eley (1952, pp. 39-40, figs. 70-73) have reported it from western Can- 

 ada (see also above). It seems possible that these various accounts refer 

 to more than one species. Their identity with Mcintosh's species seems 

 doubtful. 



Genus Aricidea (Girrophorus) Ehlers, 1908 

 Type A. (Girrophorus) branchiata Ehlers, 1908 



This subgenus differs from Aricidea, sensu stricto (see above) in 

 having modified setae in notopodia instead of neuropodia; they are 

 acicular or furcate in shape. Four species are described. 



Key to Species of Aricidea (Cirrophorus) 



1. Modified notopodial setae heavy, acicular (pi. 43, fig. 4) . . 2 



1. Modified notopodial setae furcate (pi. 43, fig. 6) . . . 3 



2. Posterior notopodia with long, digitiform postsetal lobe; 

 branchiae numbering about 25 pairs . A. (C.) branchiata 



2. Posterior notopodia with inconspicuous postsetal lobe (pi. 43, 

 fig. 4) ; branchiae numbering 15 pairs and broad and much 

 larger than their accompanying postsetal lobe A. (C.) aciculata 



3. Branchiae first present from fourth setigerous segment and 

 numbering about 33 pairs . . . . A. (C.) furcata 



3. Branchiae first present from fifth setigerous segment and num- 

 bering 15 to 23 pairs . . . . A. (C.) lyriformis 



