256 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



Subfamily Orbiniinae, new subfamily 

 Genus Orbinia Quatrefages, 1865 



Includes Aricia Savigny, 1820, pp. 12, 35-36. Not Aricia R. L., Anon., 

 1817, or Godart, 1819, and questionably Protoscoloplos Czer- 

 niawsky, 1881, p. 371. 

 Orbinia Quatrefages, 1865, p. 288; Hartman, 1936, p. 32. 

 Type O. cuvieri (Audouin and Milne Edwards) 



The thorax has 15 to 40 segments. Transition to the abdomen is 

 more or less abrupt. The prostomium is conical and pointed in front ; 

 eyespots are present or absent. Branchiae are first present from the fifth 

 or a later segment and continue on more posterior segments to the end 

 of the body. Thoracic neuropodia have blunt uncinal hooks in palisaded 

 series. Furcate setae may be present in some abdominal notopodia and 

 posterior thoracic notopodia ; they are accompanied by pointed setae. 

 Ventral cirri are usually present. An interramal cirrus is present in some 

 species (O. cuvieri, O. latreillii and O. edivardsi) and absent in others 

 (O. angrapequensis, O. bioreti, O. exarmata, O. armandi, O. johnsoni 

 and O. papulosa.) Subpodial lobes may be so conspicuous as to form 

 transverse rows on some thoracic, and anterior abdominal segments. 

 Podial lobes may be present on neuropodia and notopodia. The pygid- 

 ium is terminal and has paired short to long, filiform processes attached 

 dorsolaterally. 



Eisig (1914, p. 273), who revised the family and its various group- 

 ings, regarded Phylo Kinberg (1866, p. 251) as a synonym of Aricia 

 Savigny and selected Aricia foetida Claparede as the genotype of Or- 

 binia (as Aricia). However, since O. cuvieri (Audouin and Milne 

 Edwards) — as Aricia sertulata Savigny — was the first species attri- 

 buted to Aricia Savigny, and as Aricia foetida goes to Phylo Kinberg, a 

 valid genus, the genotype of Orbinia can be only O. cuvieri (Audouin 

 and Milne Edwards), generally regarded as including the incompletely 

 described Aricia sertulata Savigny. 



Orbinia cuvieri (Audouin and Milne Edwards) 1833 



Plate 20, figs. 1-5 



Aricia cuvieri Audouin and Milne Edwards, 1833, pp. 397-398, pi. 15, 

 figs. 5-13 ; Fauvel, 1927a, pp. 12-13, fig. 3. 



Collection. — Gullmar Fjord, Sweden (2). 



This species attains a large size with length to 300 mm and width to 

 5-6 mm; segments number about 400 (Fauvel, 1927a, p. 12). In the 

 specimens studied, the thorax has 20 setigerous segments and the 21st 



