1918] Chamberlin — Myriafods from Nashville, Tennessee 25 



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. 



Antennae 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- 

 tennse. 



Dorsal plate of first somite large, extending forwards on a portion 

 of head and largely concealing the antennse. 



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 



