334 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



Diagnosis. — A very large species of Camharincola, adults to 12 mm. 

 long in life and up to 6 mm. after preservation; in which the prostate 

 is much longer than the spermiducal gland, beyond the end of which 

 it is slightly sinuous or even loosely coiled, with a prominent clear 

 terminal bulb. Spermiducal gland with a distinct posterior deferent 

 lobe. Jaws heteromorphic but about equal in size, the dorsal dental 

 formula 3 or 5, the ventral 4. 



Description. — A large robust worm with a rather large head, body 

 fairly slender with gradually increasing diameter to segment vii; 

 segments about twice as broad as long; prosomites not greater in 

 diameter than the metasomites. 



Head broad, of considerably greater diameter than segment i, 

 its length about one-sixth the total length of the animal. Peristomium 

 not distinctly set off by a basal constriction, somewhat produced 

 forward, with four distinct lobations on the dorsal half and two broader 

 ventral lobes. 



Jaws massive, similar in both size and shape in lateral aspect, 

 anisomorphic, the dental formula 1-2 or 3-4, often 5-4 in young 

 specimens. Median tooth of dorsal jaw not appreciably larger than 

 paramedian teeth of lower jaw. 



Male reproductive sj'stem moderate in size. Bursa ovoid to sub- 

 cordate in lateral aspect, equally divided internally between atrium 

 and penial sheath; penis small, conical, not extending down into 

 atrium when in repose. Ejaculatory duct of moderate length, 

 enlarged near the middle where about one-thu-d the bursa diameter, 

 extending dorsad up to about the middle of the segment. Spermi- 

 ducal gland cylindrical, slender, its diameter usually less then half 

 that of the bursa, extending cephaloventrad below level of ental end 

 of bursa, at which point a small but distinct posterior deferent lobe 

 occurs, overhanging the region of the penial sheath. Prostate gland 

 elongate, slender, its diameter consistently about two-thirds that of 

 the spermiducal gland, which however it greatly exceeds in length, 

 the portion which extends beyond the anterior deferent duct being 

 reflexed upon itself and uniformly sinuous and spiraled in form, with 

 a distinct clear terminal bulb. Histologically the prostate differs 

 from the adjacent gland, but the cuboidal cells are proportionately 

 not so large and well-formed as in species of the Philadelphica group. 



Spermatheca extending dorsad about half-way up the segment, 

 composed of a cylindrical, thick ectal duct and an ovoid enlarged 

 ental bulb, these two regions about equal in length. No glandular 

 ental process. 



Variation. — Except in such ontogenetically changeable characters 

 as body size and distinctness of the dentition, there appears to be 

 no evident variation in this species as regards the major specific 



