204 REPORT— 1866. 



blunt ; ovicell globular, smooth, inclining inwards ; vibracular capsules of 

 moderate size, erect, bUobed ; vibracula long, arising from between the lobes 

 of the capsules. Height half an inch. Dredged in deep water in the Minch, 

 also at Shetland. Differs from S. scrvposa in haying the cells larger, not 

 furnished with sjnnes, and in the vibracular capsules, which are propor- 

 tionately large, and the mandible of the avicularia being shorter and blunter. 



Eschara quincuncialis, Norman, n. sp. 



Polyzoary white, smooth, polished, cylindrical. Cells distant, in linear series, 

 regularly arranged in quincunx, swoUen, mammiform. Apertures keyhole- 

 shaped, rounded above, with a small sinus below, immediately beneath which 

 a small inconspicuous avicularium is sometimes present. Ovicell small, with 

 1-4 round perforations. 



The specimen described is apparently a fragment, and is not more than a 

 quarter of an inch long. It is, however, manifestly distinct from aU the 

 Eschane with which we were previously acqiiainted. Dredged in deej) water 

 in the Minch. 



LepraUa coJlans, Norman, n. sp. 



Cells small, crowded, linearly arranged, not in quiucimx, granular, not 

 punctiu'ed round the margin ; mouth arch-formed, rounded above, truncate 

 below ; peristome greatl}^ elevated into a frUl-like plate which surrounds the 

 sides and lower margin of the mouth, within which there is no denticle ; 

 ovicell globular, of moderate size, punctate. 



In small patches on old shells and stones from the Minch, coast of Antrim, 

 Guernsey, and Shetland. It will be evident from the foregoing list of 

 localities that this species is widely distributed on our coasts. It has been 

 hitherto mistaken (Ijy Mr.Busk, Mr. Alder, and myself) iov L. eximia, Hincks, 

 in common with which species it has the peculiar collar-formed peristome ; 

 but having recently had an opportunity of examining Mr. Hiucks's typical 

 and onlj' known specimen of L. e.vimia, I found it to be a wholly different 

 form from that which is now described. 



Lepralia crystallhui, Norman, n. sp. 



Cells short, obovate, of moderate size, and moderately tumid, not regularly 

 arranged, nor separated from each other by raised lines, nor areolated at the 

 margin ; white, crystalline, punctate, punctures round, few, equally distri- 

 buted on aU parts of the ceU ; mouth triangular, lateral walls much raised, 

 margined above with five spines (rarely present), a small avicularium at the 

 lower angle of the mouth, with short rounded mandible directed downwards ; 

 a bifid tooth-like process within the mouth ; oviccU globular, crystalline, 

 punctate. 



On shell and stone in very small patches. The Minch and Shetland in deep 

 water. Nearly allied to L. Landshorovii, as compared with which the cells 

 are smaller, shorter, more convex, less regularly disposed, not separated from 

 each other by distinct raised lines, more regularly pimctate than is usual in 

 L. Landshorovii, in which the punctures are often absent from the centre 

 of the cell ; the mouth also is more angular. 



• Alecto compacta, Nonnan. n. sp. 



Polyzoary narrow at the base, thence rapidly widening and irregularly 

 ramifying, branches wide and short, their terminations rounded ; remarkably 

 flat, and closely appressed to the shell. Cells very small, irregularly scattered 

 and separated from each other, shortly tubular, scarcely raised above the 



