Gatty Marine Lahoratorjjj St. Andrews. 179 



hut it is uoteworthy tliat tliey and the 11th were all evenly- 

 broken about the same level. 



The lamellae become small before the 16th or 17th foot, 

 sinking below the level of the dorsum as inconspicuous 

 conical flaps. So far as observed, the simple dorsal bristles, 

 which present no distinct wings, do not vary, but about the 

 16th foot the ventral seiies consists of a dense row of wnnged 

 hooks with rather long shafts, which increase in diameter 

 from below upward, bend backward, and slightly diminish to 

 the throat (PI. V. fig. 10), from which the sharp main fang 

 comes off nearly at a right angle, and has three spikes on 

 the crown above, the whole, however, quite differing from 

 the hook of ScoIecoJejns vulgaris. The wings are rather short 

 »nd wide distally. 



The specimen is a female, and large ovoid ova with the 

 finely crenate capsule occurred as far forward as the 1st foot. 



This form approaches Prionospio in certain respects, such 

 as the plumose branchiae and the massive form of the 

 lamellge. 



The Prionospio heterobranchia of Percy IMoore *, from 

 Wood's Hole, INIassachusetts, bears certain resemblances in 

 the form of the snout, but the development of the lateral 

 processes (tentacles ?) of the snout in Kinbergella differs 

 materially, and the branchiae do not seem to possess the 

 terminal filament, whilst the pinnae or filaments of the gill 

 are much shorter in the new form, which is also devoid of 

 the conspicuous eyes. Yet the prostomium in Prionospio 

 heterobranchia tapers to a point posteriorly and the hooks 

 seem to be similar. Kinbergella therefore finds its nearest 

 ally in Prionospio. 



EXPLANATION OF THE PLATES \. 

 Plate V. 



Fig. 1. Young Gadus Ixscus, 70 mra. in length. Twice the natural 



size. 

 liff. 2. Strong bifid hook-like bristle of the fifth segment of Poli/dora 



quadrikibata, Jacobi (var. mesnili). X Zeiss oc. 4, obj. 1). 

 Fig. 3. L»or?al bristle of same (oth) segment. X similarly. 

 F gs. 4 1& o. Ditl'erent views of the hook -like bristles of the oth segment 



of Folydora corazzi. X Zeiss oc. 4, obj. D. 

 Fig. 6. Yentral hook of the same species, x Zeiss oc. 4, obj. F. 



« Proc. Acad. Nat. Sci. Pbilad. 1907, p. 195, pi. xv. figs. 1-6. 

 t I am indebted to the Carnegie Trust for the majority of the figures 

 in both Plates. 



