458 WESLEY R. COE AND STANLEY C. BALL 
Fish Commission from the same region of the Atlantic, has 
recently been sent us. 
Another individual, collected in the eastern Atlantic off the 
coast of the Azores, was described superficially by Joubin (’04) 
under the new name N. grimaldu, but as no detailed anatomical 
study was made, it is still uncertain whether or not it is specifi- 
eally distinct from N. mirabilis. 
Still another species, N. pelagica, occurs off the coast of Cali- 
fornia, and has been very fully described and excellently illus- 
trated by Cravens and Heath (06). Three specimens of this 
species were taken by fishermen in Monterey Bay and two others 
collected in a trawl off the southern coast of California. In 
these localities the water is from 400 to 2200 fathoms in depth. 
The color is described as brilliant scarlet. All were males. 
Joubin (06) later described from a superficial study, but with- 
out the aid of sections, two additional specimens of Nectone- 
mertes, each of which he considers the type of a new species. 
These are: N. chavesi, with rudimentary tentacles represented 
merely by a pair of blunt lateral lobes to the body walls, and N. 
lobata, with a slender transparent filament at the end of the ten- 
tacles. Of these the former has the cephalic gonads character- 
istic of the males, while the gonads of the last named were not 
noticed, but may have been represented by “petites papilles trés 
courtes font saillie autour de l’orifice buccal” (p. 20). Hence 
this specimen was also probably a male. 
Joubin also described six new species of deep-sea nemerteans 
taken from the same general regions in the eastern Atlantic 
and represented by eight specimens without tentacles. All of 
these he refers with more or less hesitation to the genus Plank- 
tonemertes. One of these, P. rhomboidalis, has cephalic gonads, 
and may be definitely considered as belonging to that genus. Of 
the five remaining species, two, P. grimaldii (with two specimens) 
and P. zonata (also with two specimens) have the gonads distrib- 
uted along the sides of the body, indicating that they are females. 
The descriptions of P. alberti and P. sargassicola, each described 
from a single specimen, have no mention of gonads, while the 
only specimen of the sixth species, P. elongata, is believed by 
Joubin to be immature. 
