ANNELID GENUS CAMBARINCOLA — HOFFMAN 355 



Jaws fairly small for size of head, heteromorphic, the dorsal jaw 

 with a large median tooth and two very small cusps at its base on 

 each side; ventral jaw with two large paramedian teeth and a single 

 small cusp at the outer base of each. Jaws virtually identical in 

 size, the dorsal very slightly \vider at the base. 



Male reproductive system characterized by the small globose bursa 

 (its diameter less than that of the spermiducal gland), by the very 

 slender, tubular prostate which is less than half as long as the sper- 

 miducal gland, and by the stout, acutely reniform shape of the 

 latter, its ental half curved strongly caudad and accentuating the 

 region of the posterior deferent duct. 



Spermatheca composed of three major portions: 1, An enlarged, 

 muscular ectal region about half as large as the bursa; 2, a strongly 

 constricted cervical region of the ectal duct; and 3, a greatly 

 expanded, thin-walled, subglobose ental bulb. 



Vaeiation. — The species is known only from two specimens. 

 Goodnight's original description must have been based upon the 

 paratype which he retained, for the holotype is somewhat larger 

 than the pubhshed dimensions, its dorsal jaw 0.11 mm. in width 

 instead of 0.07 as stated by Goodnight for his specimen. Having 

 studied but the single specimen, I cannot say anything further on 

 the subject of variation. 



Affinities. — C. meyeri is undoubtedly a member of the Phila- 

 delphica subgroup, but differs from the others at least in the slen- 

 der, short prostate and strongly curved, heavy spermiducal gland. 

 It is possible that Goodnight's observation on the peristomium will 

 be confirmed, to constitute another diagnostic feature. Had no 

 specimens been available for study, my inclination would have been 

 to dismiss the name as probably a junior synonym of philadelphica 

 or one of its localized races. 



Goodnight states that " Cambarincola meyeri is closely related to 

 Cambarincola vitrea Ellis, but differs in the structure of the upper 

 jaw," I agree to a relationship between the two, but only as mem- 

 bers of the same genus; actually they seem to be very dissimilar and 

 fall into different groups of the Philadelphica section. 



Distribution. — Knowai definitely only from the type locality. 



Remarks. — The status of this species is by no means as well- 

 established as might be desired. I have at hand a large series of 

 well-preserved specimens from tlie vicinity of Livingston, Overton 

 County, Tennessee (Holt, leg.), which agree in virtually every detail 

 ^vith the holotype of meyeri, not only in size and shape of the body, 

 but also in small details of the reproductive systems. The concord- 

 ance is such that conspecificity with the type specimen is almost 

 assured. Yet there appears to be a discrepancy in the jaw struc- 



