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Rowland M. Shelley 
where it remained for 52 years. Chamberlin (1950) erected Euzonium 
for E. crucis, a striped species from Felton, Santa Cruz County, California, 
and (1954) proposed Hypozonium arnaudi, for a striped female from 
this locality that was taken on the same date and by the same collector 
as the type of E. crucis. Chamberlin and Hoffman (1958) included 
Octoglena in the synonymy of Polyzonium and reported Euzonium, 
Hypozonium, E. crucis, and H. anurum, inadvertently omitting H. arnaudi. 
However, Buckett (1964) included this species in his listing of California 
diplopods, and Jeekel (1971) cited all the genera along with their 
type species. Hoffman (1980) assigned Hypozonium and Euzonium to 
the Hirudisomatidae and revived Octoglena for a California hirudisomatid, 
because the collector, John Lawrence LeConte, sampled in California 
as well as Georgia, and because the striped pigment pattern fits Californian, 
rather than Georgian, polyzonioids. Hoffman (1980) and Shelley (1988) 
suggested that O. bivirgata Wood may be a senior name for E. crucis 
and H. arnaudi, which the present study confirms. Kevan (1983) reported 
H. anurum from unspecified sites in British Columbia, the first ordinal 
records from western Canada, and Kevan and Scudder (1989) included 
the milliped in their key to Canadian myriapods. Shelley (1990) reported 
five localities for H. anurum in the southwestern corner of the British 
Columbia mainland, which were reiterated by Scudder (1994). 
Key to North American Families of the Polyzoniida 
(adapted from that by Hoffman (1990)) 
I. Tarsal claws with prominent, overhanging paronychium; animals 
relatively quick and active, color pink; south Florida and Louisiana. 
Siphonotidae 
Tarsal claws simple, without paronychium; animals relatively 
sluggish, color pale white, yellowish, or with one or three 
dark longitudinal stripes 2 
2. Caudal edges of metaterga detached from succeeding tergite, elevated 
or variably upturned; telson broad or narrow; penes short and 
subconical, located caudoventrad on 2nd male coxae (Figs. 
3-4, 8, 12) Hirudisomatidae 
Caudal edges of metaterga not upturned, smoothly overlying and 
closely appressed to succeeding tergite; telson narrow; penes 
relatively long, located well dorsad on caudal surface of 2nd 
male coxae (Fig. 5) Polyzoniidae 
Family Hirudisomatidae 
Genus Octoglena Wood 
Octoglena Wood, 1864:186; 1865:229. Bollman, 1893:117, 137, 187. 
