1918] Chamberlin—Myriapods from Nashville, Tennessee a5 
Choctella gen. nov. 
A Nannolenid genus which has the usual form and proportions 
of Spirobolus. 
Mandibular combs 7. 
Gnathochilarium as in Nannolene and Epinannolene. 
Ocelli in several series, arranged in a triangular patch. 
Repugnatorial pores beginning on the sixth somite, each pore in 
front of the transverse suture of the somite. 
Antenne short, composed of 7 articles of which the fifth and 
sixth are clavately enlarged. 
Second and third articles longest, subequal; fourth, fifth and 
sixth but little shorter, subequal. Head below eyes deeply sub- 
vertically grooved, for the reception of the proximal portion of an- 
tenne. 
Dorsal plate of first somite large, extending forwards on a portion 
of head and largely concealing the antenne. 
First and second legs in male reduced in size but armed and 
otherwise similar to the succeeding pairs. 
All somites excepting the first and last strongly longitudinally 
striate beneath and almost half way up to the repugnatorial pore, 
elsewhere smooth. 
Posterior border of last segment above rounded, exceeded by the 
anal valves. Mesal edges of anal valves meeting in a distinct 
groove. 
Gonopods well exposed. Gonopods two pairs, coleopods and 
phallopods respectively, the seminal duct traversing the latter. 
Each coleopod simple, thin, plate-like, and undivided. 
Phallopods also undivided. 
Genotype: Choctella cumminsi sp. nov. 
16. Choctella cumminsi sp. nov. 
The general color below is black excepting the caudal, over- 
lapping border of each somite. Dorsally the somites remain dark 
in a more or less narrow band adjacent to this pale posterior border 
elsewhere bearing greyish yellow or more typically in part reddish, 
the color rather irregular in arrangement. Ordinarily the light 
markings of the dorsum are less extensive anteriorly than else- 
where, the caudal segments also in some being similarly darker 
than the middle ones. Head in general greyish black. Labrum 
