AMPHIGLENA MEDITERRANEA. 271 
series of minute spatulate bristles accompany them. Posterior hooks with more numerous 
spikes above the main fang, and the posterior process is shorter. Hermaphrodite and 
tubicolar. 
De Quatrefages thought that the type of circulation in this group was degraded, for he 
could make out no vessel except in the vicinity of the branchie. The lining membrane 
of the coelom, however, seemed to be detached and to contain the blood under it, and so with 
other tissues, the blood thus bathing them. This has not been verified. 
SYNONYMS. 
1851. Amphicora mediterranea, Leydig. Zeitschr. f. wiss. Zool., Bd. in, p. 328, pl. ix, figs. 6—7. 
1864. Fabricia Armandi, Claparéde. Glanures, pp. 36 and 128, pl. in, fig. 1 
1868. Amphicora mediterranea, idem. Annél. Nap., p. 414, pl. xii, fig. 6. 
1875. - ¥ Marion et Bobretzky. Ann. Sc. nat., 6° sér., t. 11, p. 91. 
»  Amphiglena ie Panceri. Atti Soc. Ital., vol. xviii, p. 533. 
1890. - +5 Chigi. Organi excretorid. Serpuli, Foligno, pp. 51 and 77 (fide auct.). 
1893. a , Lo Bianco. Atti R. Accad. Sc. Nap., vol. v, No. 11, p. 81. 
1894. Amphicora 3 De St. Joseph. Ann. Se. nat., 7° sér., t. xvii, p. 307, pl. xi, figs. 315— 
. 322. 
1906. Amphiglena i idem. Ibid., 9° sér., t. i, p. 241. 
1909. oe a, Lo Bianco. Mitt. Zool. St. Neap., Bd. xix, p. 576. 
e x; 4 Fauvel. Bull. Inst. Oceanogr., No. 142, p. 44. 
f aN Pf idem. Ann. Sc. nat., 9° sér., t. x, p. 210. 
1910. . 7 Elwes. Journ. M. B. A., vol. ix, p. 60. 
1911. r ss Riddell. Proc. Liverp. Biol. Assoc., vol. xxv, p. 65. 
1913. ei Ehlers. Deut. Siidpol. Exped., p. 576. 
1914. . 5 Fauvel. Campag. Scient. Monaco, xlvi, p. 317. 
1915. 7m a. Allen. Journ. M. B. A., vol. x, p. 643. 
1916. 4 . McIntosh. Ann. Nat. Hist., ser. 8, vol. xvi, p. 28. 
1917. ms 3 Rioja. Anél. Polig. Cantab., p. 69. 
Habitat—Hope’s Nose, Torquay, between tide-marks (Major Elwes); Plymouth (Dr. 
Allen). 
Abroad it occurs in the Mediterranean; shores of Cantabria (Rioja), Atlantic; Dinard, 
France, and Cannes in Lithothammon (De St. Joseph); Fayal and Monaco (Fauvel); St. 
Vaast-la-Hougue (Fauvel) ; Antarctic Seas (Ehlers); Persian Gulf. 
The cephalic region bears ten branchie, each pinnate with a double row of barbules, 
the whole forming, in the preserved examples, a tuft about one-third the length of the body. 
Hach filament, according to De St. Joseph, consists of a double row of “‘cellules cartilagineuses,” 
whereas the barbules have only a single row. The number of ciliated barbules appears 
to be about thirty, and they are shorter at the base and the tip than in the middle. The 
tip of the filament ends in a long and slightly tapered process with a narrow web at the base, 
and it has palpocils. Hach branchial filament has a single vessel (Claparéde). Besides 
the two ciliated palps mentioned by Claparéde, De St. Joseph, after Claparéde, shows 
a coiled process on each side—filled with brown pigment-granules, which, after Meyer, 
he considers to be a fold of the upper lip—forming a superior lateral chamber on each side. 
The body (Plate CXV, fig. 4) is about 8 mm. in length, but some may reach 18 mm. 
