304 JASMINEIRA CAUDATA. 
and turned upward posteriorly. A slight constriction occurs at the neck, from which the 
main fang comes off at less than a right angle and is long and sharp, whilst on the crown above 
are numerous minute teeth. The posterior outline bends forward at the crown, then 
backward, and with a bold forward curve in the main part of the body. The differences 
between this species and J. caudata, Langerhans, which Mr. Southern procured in Clew Bay, 
seem to be slight, mainly the elongated caudal process, as in the form procured at Madeira 
by Langerhans. 
The arrangement of the bristles and hooks in such a type is well seen in transparent 
preparations of a young form.' The first pair of bristle-tufts differs from the succeeding in 
having no spatulate forms, which appear in the second tuft, the ventral region of which has 
eight long hooks; the third has also eight long hooks, whilst the fourth has only six and fewer 
bristles. The fifth and sixth each have six hooks; the seventh has four, the eighth four 
on one side and five on the other, and there the thoracic region ends. The next segment 
has no spatulate bristles, and the hooks are avicular. Both the finely tapered curved bristles 
and the diminishing hooks continue to the posterior end. 
Reproduction.—De St. Joseph found the males whitish from the sperms, whilst the 
females were greyish or brownish from the eggs. A female of 7 mm. carried eggs—indeed 
all his examples seem to have been smaller, 12—18 mm., than the British. The French 
author found Gregarines and Cytodes with parapodia in the intestine, together with 
encysted Gregarines, and from the presence of two denticles he thought the two Gregarines 
pertained to the genus Pachysoma, Mangazzini. 
Lo Bianco (1909) gives August and September as the period of sexual maturity in 
Jasminewra candela, and it is probable the British form would not differ much except in being 
somewhat later. Southern found mature specimens in May, August and September. 
2. JASMINEIRA CAUDATA, Langerhans, 1880. Plate CXXXVIII, fig. 5—anterior hook ; 
fig. 5a—posterior hook. 
Specific Characters.—The collar appears to be higher and not so oblique as that of J. 
elegans. Two oblong red eyes and a pair of statocysts in the second segment. Body with 
seventeen abdominal segments, whereas J. elegans has twenty-eight to thirty-two. A 
caudal appendage. 
SYNONYMS. 
1880, Jasmineira caudata, Langerhans. GZeitschr. f. wiss. Zool., Bd. xxxiv, p. 114, Taf. v, fig. 32. 
1914. es ¥ Southern. Proc. Roy. Irish Acad., vol. xxxi, No. 47, p. 140. 
1916. 2 - McIntosh. Ann. Nat. Hist., ser. 8, vol. xvi, p. 47. 
Habitat—Clew Bay, 17 fathoms (Southern). Elsewhere it occurs at Madeira 
(Langerhans). 
The posterior hooks (Plate CXXXVIII, fig. 5a) of this form are smaller and less 
curved than those of J. elegans, and the process at the base posteriorly is perhaps less 
1 T am indebted to Major Hlwes for these and other interesting forms from the southern shores. 
