BY WILLIAM A. HASWELL, M.A., B.SC. 671 



phrodite, and multiplies by budding (1). The first indication of 

 the phenomenon of budding is the appearance of a slight con- 

 striction about the eighth to the tenth segments of the abdomen. 

 The body behind this now usually developes some additional 

 segments, becomes a little dilated, and the coelom in this region 

 becomes filled with granular cells. A slight elevation now 

 appears on one side of the tenth abdominal segment, and this 

 becomes more and more prominent and divides into eight lobes. 

 Each of these eight lobes becomes elongated, and their bases 

 grow round the circumference of the segment till they come to 

 form a whorl round the body of the animal ; soon lateral 

 pinnules appear on them, and they assume the form of branchiae. 

 A few segments have, meanwhile, been added in front of the bud, 

 and, the oesophagus and gizzard of the bud having become 

 developed from the intestine of the parent, a process of fission 

 separates the bud from the parent organism. 



12. Sabella velata. N. sp. 

 [Plate XXXL, fig. 8, and Plate, XXXIV., figs. 1-4.] 



This species has about 40 segments in the body, eight belonging 

 to the thorax. There are eighteen long, slender branchiae set on 

 a narrow lophophore and forming nearly a complete circle. 

 Connected with the inner face of each half of the lophophore is 

 a filiform process. Connecting together the stems of contiguous 

 branchiae near their bases are a series of gossamer-like membranes, 

 each four-corned, with two of the corners attached to each of the 

 two stems, the lateral borders being deeply concave and 

 unattached. 



The thorax is long and slender and cylindrical ; it is composed 

 of eight segments, as in others of the genus. The first segment 

 has but a low ridge representing the collarette of the Serpulce : 

 it possesses a narrow oblique band of dorsal setae which project 

 but slightly from the surface ; they have stout stems and a 



(1) Clapankle, " Beobachtungen liber Anatomie und Entwickelungs- 

 geschichte wirbelloser Tbiere ;" " Annelides Che^opodes du Golfe de 

 Naples," p. 437 ; Huxley, "On a Hermaphrodite and Fissiparous Species 

 of Annelide," Edinburgh New Philosophical Journal, 1864. 



