Gatty Marine Lahora(ori/y St. Andrews. \?t'.\ 



with a reapiiij^-liook curve is present iti tlic sueccedinfif 

 sof^incnts, only those with a " knee'' and an ordinary winged 

 tij). The hook a<;roes witli that found in the common 

 Filoffrana, though the artist has not represented the streaks 

 at right angles to the serrations. The earliest l)ud has 

 only segments similar to the ahdominal of the parent. 



lie considers his species near Huxley's Protula di/sleri, 

 though it has no eyes; both have the terminal organ of the 

 branchial filaments. So far as can be seen, there is nothing 

 in Ehlcrs's description to distinguish his species from 

 Fi l()(/ra na i mp Uwa . 



Lo Bianco'^ (1893) mentions the following hermaphrodite 

 forms : Amphiylena, Salmac'uia, Spiror/jis, Pileolaria, &c., 

 the ova being deposited in the interior of the tube or placed 

 in the operculum ; the young by-and-l)y forming colonies by 

 fission. Fis-i parous reproduction occurs in Salmacina and 

 Telepsarus. 



Tn 1891 De St. Josepli t made a contribution to the 

 history of this species {Salmacina dysteri variety), which he 

 dredged frequently on shells, on Rytiph/oea pitiastroides, and 

 collected on rocks and stones at Kochardieu. He gives the 

 size as 6 mm., and shows how in many features it resembles 

 Filuyrana iinplexa, only it has no operculum. He further 

 states that each branchial filament is terminated by a 

 peculiar enlargement formed by a double row of cells with 

 palpocils, the latter also occurring on the pinnae. The 

 segments of the anterior region (tliorax) range from seven to 

 nine, and have bristles and hooks resembling those of FHoyrana 

 imple.va. The naked region behind the anterior has ten or 

 twelve segments^ whilst the posterior region (abdomen) has 

 from 40-50 segments, the middle being narrowed, and the 

 anterior and posterior parts dilated, the tip again narrowing 

 to the two terminal pa})ilUe. The bristles agree with those 

 of F. iniple.ra. The alimentary canal, the blood-sinuses 

 arouiul the gut, and the excretory organs anteriorly de- 

 bouching by a common aperture are all in accordance with 

 (he j)arts in /'. implexa. He found ripe eggs and ciliated 

 embryos in the coelomic cavity, proving that impregnation 

 is internal, the earlier atrochous forms of similar size to the 

 eggs, and with two minute eyes in front ; besides others 

 more advanced, with a ciliated collar behind the eyes, three 

 setigerous segments, and an anal. No hooks are present. 

 This stage he thought anterior to that de-^cribed by Giard iu 



♦ "Gli annellidi tiibicoli trovati nel Golfo di Xapoli," o/>. cit. 

 t Anu. Sc. Xut. b*" s^r. t. xvii. p. 340, pi. xiii. tigs. 375-380. 



