156 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



Family IT.— JULIDJE. 



Analysis of lite subfamilies of Julidce. 



a. Gnathochilarmm stipes separated by the promentum; meutnm entire, touching 

 promentum ; spatula absent. 

 b. None of the anterior segments apodous, 1, 2, 3, 4 each with a pair of legs; 

 gnathochilarium stipes smaller than promeutum; cardo absent; man- 



dibulary combs 10 (9) ; antenme sbort and thick Spirobolin.e. — V. 



bb. Fourth segment apodous, 1, 2, and 3 (except in Glyphiulus) each with a single 

 pair of legs; gnathochilarium stipes larger than promentuni; cardo 

 present; antenme not short and thick. 



c. Promentum entire; mandibulary combs 8-10 Spirostreptinje. —VI. 



ec. Promentum divided ; mandibulary combs (5) 6-7 Cambalusle. — VII. 



aa. Gnathochilarium stipes not separated by the promeutum; meutum bipartite, 

 not touching the promentum, which is small and separate 1 from the 

 mentum by the stipes; spatula present; third segment apodous. 

 (1. Mandibular combs 10 (9) ; second pair of legs dwarfed; $ promentum, first 

 segment and first pair of legs (6-jointedj very large. 



Parajulin.e. — VIII. 

 (Id. Mandibular combs 4. 



e. Only the ventral plates of the first and second segments free ; $ geuital 

 ducts opening through the coxa' of second pair of legs.. .Julunle. — IX. 



ee. All the ventral plates free ; $ genital ducts not opening through the 

 coxre of second pair of legs NemasominzE. — X. 



Subfamily V. — Spirobolunle. 



This subfamily contains the genus Spirobolus* Brandt. 



Subfamily VI. — Spirostreptunle. 



Analysis of the genera of Sjpirostreptince. 



a. Segments without carinas or spinelike warts. 



b. Repugnatorial pores beginning on the sixth segment ; mandibular combs 10. 



SPiROSTREPTUSt Brandt. 

 bb. Repugnatorial pores beginning on the fifth segment; mandibular combs 8. 



Alloporus Porath. 

 aa. Segments with carinas or spinelike warts. 



c. Third segment with a single pair of legs. 

 d. Ocelli in a single series; segments with 20 rows of spinelike warts, first 



dorsal plate carinated Trachyjulus Peters. 



dd. Ocelli in about 9 rows ; segments with about 8 rows of spinelike warts, 



first dorsal plate smooth Acanthiulus Gervais. 



cc Third segment with two pairs of legs; ocelli in many series; segments Avith 

 10-11 rows of spinelike warts, first carinated Glyphiulus Gervais. 



* Analysis of subgenera of Spirobolus. 



a. Dorsal part of segments without seobina Spirobolus, s. str. 



aa. Dorsal part of all or nearly all the segments with seobina Rhixocrinus. 



^Analysis of subgenera of Sf>irostreptus. 

 a. Anal valves without a sharp or blunt spine which passes beyond anal segment. 



• Spirostreptus, s. str. 



aa. Anal valves with a sharp or blunt spine which passes beyond anal valves. 



The subgenus Nodopyge Brandt, according to the rules of nomenclature, must give 

 way to Spirostreptus. 



Odontopyge Brandt. 



