AUTOLYTUS LONGIFERIENS. 245 



produced between the last and the penultimate segment, these segments show no trace of 

 sexual elements. After it separates the nurse-stock regenerates the posterior end and 

 the caudal cirri. In the best-developed bud a single simple bristle accompanies the 

 compound. 



The ripe buds agree with those of Aiitolytus prolifer, having a head with a frontal 

 notch, three tentacles, and four eyes furnished with lenses, the ventral pair being larger than 

 the dorsal. The first segment of the body has two tentacular cirri, and in a female bud 

 (De St. Joseph) eighteen segments follow, sixteen of which have large grey eggs. All 

 the segments except the first two and the last two have swimming bristles. In the first 

 a simple bristle, "a l'article en alene," is amongst the falcigerous forms. After they are 

 detached they acquire twenty-five segments, the swimming bristles are shed, and an 

 ovigerous pouch containing about three hundred embryos of the stage described by Max 

 Miiller with small eyes and cilia is found. 



The description of the male bud as given by De St. Joseph does not seem to differ 

 from that of A. prolifer. The same author gives an account of nurse-stocks of thirty- 

 eight and twenty-seven segments, with buds varying in degree of development, in the 

 latter case a region without bristles following the nurse-stock ; then a bud of twelve 

 segments without a head ; a second of seventeen segments with the head indicated ; a third 

 of twenty-one segments with four eyes, three tentacles, and traces of eggs; a fourth of 

 twenty-five segments with the head well developed and advanced eggs; a fifth bud of 

 nineteen segments with large head and eggs ; and a sixth and last bud of twenty 

 segments with large eggs and natatory bristles, twisting its body with energy in order to 

 detach itself. Bach bud had a rudimentary intestine and compound bristles, but the last 

 only had the natatory bristles. Only a single fully formed male bud (Pohjbostriclms) of 

 twenty-one segments was seen attached to a nurse-stock of thirty-six segments. He 

 found a nurse-stock with seven male buds without swimming bristles, and only the last 

 showed sexual elements. 



One example forwarded by Major Elwes had seven buds, the first having only a 

 pair of lateral processes posteriorly. The second had no bristles, and the third a few 

 in front. 



Autolytus longifeluens, De St. Joseph, 1886. Plate LXXXVI, fig. 17 — bristle; Plate 



LXXXVII, fig. 16— foot. 



Specific Characters. — Head fairly large ; four considerable eyes with lenses. Central 

 much longer than the lateral tentacles. A median line indicates the palpi. Tentacular 

 and first dorsal cirri as in A. ehbiensis. Body rather massive, from 10 — 20 mm. in 

 length, and having from fifty-one to eighty-eight segments. Dorsal cirri of moderate 

 length and alternately long and short. Posteriorly are two long and large caudal cirri. 

 General colour orange, with three longitudinal reddish bands, the two lateral forming 

 " epaulettes " in the first two segments. Proboscis remarkable for its great length, coiled 

 condition, and slenderness, as well as for its crown of ten large, obtuse teeth, and 

 its intermediate series of two or three smaller pointed teeth, which have two spines 



