168 MR. H. CHARLTON BASTIAN’S MONOGRAPH 
Pharyngeal cavity shallow and indistinct ; apophyses well marked, toyo” long. (Es. 
phagus about 3th of total length, with a large ovoid swelling at termination, and provided 
with two rows of brownish pigment extending backwards on either side from two local 
reddish-brown aggregations 445° from the anterior extremity and within the sheath 
of esophagus. Intestine covered with fat-particles, having a more or less tessellate 
arrangement. Anus ròs from posterior extremity. Vulva at middle of body. Oeelli 
as above. 
Male, length 45", breadth 335”. 
Anus 533" from posterior exterior extremity. Spicules curved, 34,” long; accessory 
pieces two, strong, broad, 345” long. 
Hab. Very abundant about Cladophora rupestris and some other small green weeds 
from tide-pools, Falmouth. 
2. C. NUDICAPITATA, n. sp. (Plate XIII. figs. 230-232.) 
Female, length 45", breadth 444”. 
External Characters.—Body tapering very slightly forwards. Head rounded, naked. 
Integument with delicate transverse striæ, 4145155 apart; longitudinal not recognized. 
Pharyngeal cavity shallow and indistinct; apophyses 4455" long. (Esophagus about 
3th of total length; rounded swelling at termination. Intestine sparingly covered with 
hepatic particles. Anus 545” from posterior extremity. Vulva slightly anterior to 
middle of body. Ocelli two, reddish brown, at 1000 from anterior extremity; occa- 
sionally one only, in middle line. | 
Male, length 355", breadth 314". 
Anus 335 from posterior extremity. Spicules slightly curved, 3453” long; accessory 
pieces narrow, and curved at inner extremities, about 1500 long. In mid-ventral region 
above anus, within the substance of the integument, are five disk-shaped, highly refractive 
bodies, about 5455" in diameter, whose distances apart gradually diminish anteriorly. 
Hab. On small, stunted, greyish specimens of Cladophora rupestris from tide-pools 
near high-water mark, Falmouth. | 
3. C. NATANS, n. sp. (Plate XIII. figs 236-238.) 
Female, length 35”, breadth 34”. 
External Characters.—Body tapering very slightly towards anterior extremity, but as 
usual at posterior. Head rounded, provided with four spreading setze. Integument 
very transparent, not darkened anteriorly, having transverse stri 5455” apart; longi- 
tudinal not recognized. 
Pharyngeal cavity indistinct; apophyses 5455" in length. Œsophagus +h of total 
length. Intestine well covered with large-sized greenish-yellow granules, having n 
distinct arrangement. Anus 133 from posterior extremity. Vulva at middle of body. 
Ocelli two distinct conical aggregations of red pigment, situated almost laterally 0? 
the cesophagus, which is somewhat narrower at this point. 
Male, length gs, breadth sis. ; 
Anus 31," from posterior extremity. Spicules rather narrow, curved, „17 18 
