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its proximal end. L. cocJilcar Schmidt x ) has only 8 tentacles, a number which is almost certainly 

 smaller than that of the 'Siboga' specimens. L. pcs ~) has a stalk which is commonly shorter 

 than the calyx. L. neapolitanum '"') is very insufhciently known ; but its calyx is narrow and the 

 stomach does not appear to have vvell marked lateral lobes. L. alatum was very incompletely 

 characterised by Barrois 4 ), its original describer, and it is almost impossible to decide whether 

 this form is identical with any of the others or not. The specimens which have more recently 

 been referred to this species by Jullien and Calvet 5 ) are very different from Barrois' figure 

 in the proportions of the stalk, which in Jullien and Calvet's specimens is considerably shorter 

 than the calyx; and it appears doubtful whether they belong to L. alatum. 



It seems justifiable, as the result of these considerations, to regard the 'Siboga' specimens 

 as the representatives of a new species. 



2. Loxocalyx leptoclini Harmer. (PI. I, fig. i). 



Loxosoma leptoclini Harmer, 1885, Quart. J. Mier. Sci. XXV, p. 263. 



402. D., on Cephalodiscus sibogae (slide 402. A.). Stat. 204. Between Islands of Wowoni and 

 Buton, 75 — 94 Metres; sand with dead shells. 



A single specimen of Loxocalyx was found on one of the slides of the above species 

 of Cephalodiscus. The foot-gland is well developed and the foot has strongly marked alate 

 expansions. The calyx is hardly more than half as long as that of L. lineatus\ and the stalk 

 is not quite twice as long as the calyx. The lateral lobes of the stomach are strongly marked, 

 and there are almost certainly ten tentacles. The calyx measures 180 y. in length, and 147 a 

 in breadth. The stalk is 320 u. long. 



The specimen differs so much in size from those described above as L. lineatus that it 

 can hardly be referred to the same species. The brood-pouch contains two embryos, and ovaries 

 are present, without testes. Its measurements approach closely those of L. leptoclini, with which 

 it agrees in the general proportions of the stalk and body, in the number of the tentacles, in 

 the prominence of the lateral lobes of the stomach, and in the form of the wings of the foot. 

 It appears to me better to refer it provisionally to this species than to describe it as new. 



Loxosoma Keferstein. 

 1862, "Unt. nied. Seethiere", Zeitsch. wiss. Zool. XII, p. 131. 



1. Loxosoma lanchesteri n. sp. (PI. II, figs 4, 5). 



Size large. Calyx pear-shaped, narrower distally, the broadest part close to the proximal 

 end and almost equalling its length. Lateral parts of the calyx somewhat depressed, the median 

 part more convex. Stalk much longer than the calyx, cylindrical proximally, and without foot- 



1) In Brf.hm's "Thierleben", Ed. 2, 1878, Bd X, fig. on p. 1S1. 



2) Cf. my remarks on this species, t. cit., p. 262. 



3) Kowai.evsky, A., 1866, Mém. Acad. St Péteisbourg, (7) X, N° 2, figs I, 2. 



4) BARROIS, J., 1877, "Rech. Emb. des Bryozoaires", p. 9, PI. XVI, fig. 4. 



5) Jullien, J. and Calvet, L., 1903, "Rés. Camp. Sci. Prince de Monaco", XXIII, p. 29, PI. II, figs 40—4^. 



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