THE POLY CHA3TOUS ANNELIDS OF PORTO RICO. 
185 
PODARKE Ehlers. 
Podarke agilis Ehlers. 
Podarke agilis Ehlers, Die Borstenwiirmer, p. 197, pi. 8, figs. 9-11. 
A single specimen I have referred, rather doubtfully, to this species. The anterior end was 
mutilated, so that it was impossible to compare the cirri with Ehlers’s description. The median 
antenna is proportionately longer than in Ehlers’s -description, and the number of body segments 
greater. Collected from Puerto Real. 
CASTALIA Sars. 
Castalia longicirrata, n. sp. 
Head roughly shield-shaped, its posterior end prolonged into two diverging processes. (See 
fig. 2.) Antennae delicate, a trifle longer than palps. Palps 2-jointed, terminal joint conical, narrower 
than basal. When proboscis is protruded the head abuts on 
a conical process borne on dorsal surface of proboscis, which 
looks, in surface view, like a very thick median antenna. 
(Fig. 2 ,pr.). Four eyes, the anterior nearly twice as large 
as posterior, body of 19 segments. Anteriorly, dorsal ramus 
of parapodium not more than one-third the length of 
ventral and much narrower. Toward the posterior end 
the ventral rami increase very much in thickness and the 
difference between the two is more pronounced. Each has 
a stout, black aciculum. Setae of ventral bundle compound. 
(Fig. 3.) Those of dorsal bundle long, acicular, transversely 
striated, minutely serrated near the end. The eighteenth 
segment without parapodia, but, I think, with cirri. The 
posterior end was ^oo badly mutilated to determine this 
point with certainty. Two anal cirri. Ventral cirrus 
reaching beyond tip of parapodium. Dorsal cirrus very 
long, in length equaling four times the diameter of the body. 
Color pale yellow, with marked iridescence. An indication of transverse markings could be seen 
on most of the segments, looking as if the color originally present had been removed by the alcohol. 
Collected from station 6079. 
Castalia mutilata, n. sp. 
Head much broader than long, with anteriorly a median “tongue” marked off by two very 
indistinct lines. (See fig. 4.) With high power two very delicate pro- 
cesses may be seen at anterior edge (fig. 4, ant?); these I interpret as 
rudimentary antenna*. Palps 2-jointed, terminal joint much longer than 
basal. Eyes four, the anterior considerably larger than posterior pair. 
Six pairs of tentacular cirri. Body of 53 segments, broadest anteriorly, 
and narrowing gradually toward posterior end. Length, 17 mm. Greatest 
width, 1.5 mm. 
Parapodium uniramous, with long conical anterior fip and shorter 
and more rounded posterior one. Seta- in two bundles, all compound, 
terminal article of most ventrally-placed seta- considerably shorter than 
those of dorsal ones. A delicate ventral cirrus is situated about a quarter 
of the length of parapodium from its end and reaches to the end of the 
posterior lip. The dorsal cirrus is very much stouter, placed nearer the 
body. The terminal articles of all the dorsal cirri and anal cirri had been broken away. 
Collected from San Antonio bridge, San Juan. 
I have identified these last two specimens as belonging to the genus Castalia from Ehler’s 
diagnosis, Die Borstenwiirmer, p. 187. 
Fig. 4. — Head ol Castalia muti- 
lata, x 26, ant?, antennae; 
pip, palps. 
