1855.] 381 



49. Stylochus corniculatus. Oblong, with broadly rounded extremities, sub- 

 translucent, mottled with yellowish-brown ; tentacula prominent, pyramidal, 

 triangular, with the minute ocelli crowded along the whole length of their ex- 

 terior faces; no spot on the body; a clear, pellucid, circular spot between the 

 tentacula. Length 2 inches. 



Hab. China. 



50. Stylochus reticulatus. Broad, ovate, of a pale brown color, with darker 

 clouds ; surface reticulated with strings of black punctas ; tentacula situated 

 in a clear space at the anterior fourth of the length of the body ; ocelli in four 

 clusters, two on the tentacula at their bases in front, and two oblique ones anterior 

 to and between the tentacula. Length 2 inches. 



Hab. Loo Choo. 



51. Leptoplana sparsa. Oblong, subtruncate before, of a pale brown color ; 

 ocelli very minute, scattered along the margin of the anterior half of the body, 

 and forming three clusters on the head, one large central and two very small 

 lateral ones. Length 1 inch. 



Hab. Kikaisima. 



52. Leptoplana acuta. Oblong, pointed at both extremities, pale grey, mot- 

 tled with brownish ; ocelli few, minute, in two lunate clusters convex outwards. 

 Length inch. 



Hab. China. 



53. Leptoplana obscura. Elongated oval, dark-brownish with a tint of lilac, 

 often maculate, paler along the middle of the back ; ocelli few, minute and in- 

 conspicuous, in the two parallel linear clusters at the middle of the head, and 

 scattered along the anterior margin. Length J inch. 



Hab. China. 



54. Leptoplana trull^eformis. Elongated, trowel-shaped, broadest at the 

 head, of a pale brown color; ocelli situated in a clear space anteriorly, forming 

 two conspicuous diverging clusters, and four small nebular ones, placed before 

 and behind these, and confluent with them. Length f inch. 



Hab. China. 



55. Leptoplana collaris. Elongated, truncate in front, tapering and rounded 

 behind; ocelli in two elongated clusters, confluent anteriorly and diverging 

 from each other posteriorly ; color pale greyish with two dark-brown longitudi- 

 nal lines ; a transverse white band just behind the eye clusters. Length J inch. 



Hab. Loo Choo. 



56. Nareda serpentina. Elongated, somewhat flattened, brownish ; head 

 broader than the body, emarginate in front ; neck well contracted ; eyes two, 

 rather large, bilobate, placed one on each side at the middle of the head. 

 Length 2\ inches. 



Hab. Loo Choo. 



57. Meckelia piperata. Greatly elongated, depressed and broadest at the 

 middle ; color light yellowish, sprinkled with black in transverse clouds ; margin 

 white ; head narrower than the body, white in front of two large black spots near 

 the middle ; lateral fissures extending obliquely upward to the back, and sepa- 

 rated anteriorly from the wide transverse mouth by a bright crimson partition ; 

 genital aperture placed anteriorly, before the middle of the head. Length 8 

 inches. 



Hab. Kikaisima. 



58. Meckelia cingulata. Slender, reddish-brown, with distant white annula- 

 tions regularly arranged, the first girding the middle of the head, which is also 

 margined with white ; head oblong, truncate and emarginate in front ; neck dis- 

 tinct ; genital aperture just before neck below. Length 4 inches. 



Hab. China. 



