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HALICLYSTUS AT SCARBOROUGH. 
JOHN IRVING, M.D., 
Scarborough, 
THE unexpected has happened, and another marine record for 
the Yorkshire coast is added to our lists. It is an important one, 
for Haliclystus octoradiatus nominally belongs to the South. 
In the final paragraph of a short article on Lucernaria cam- 
panulata ( Naturalist, July, 1913), I mentioned the absence of 
Zostera grass as a reason why Haliclystus, the common lucer- 
narian of the English Channel, was not found at Scarborough. 
That statement holds good no longer, for since July, many young 
Haliclystus octoradiatus. 
Fig. 1.—Diagram (aboral view): (C) colleto-cystophores, (G) genital bands, , 
Fig. 2.—Diagram (oral view): (C) colleto-cystophores, (M) mouth. 
Fig. 3— Diagram of end of stomodzum, 
Fig. 4—Diagram of section of colleto-cystophore. 
forms, adhering to Red Ceramium, have appeared in two 
distinct South Bay areas. Not a single adult, however, has 
been discovered. The natural inference is that adults are, or 
have been, in the vicinity, probably at some lower level where 
Zostera may be hidden, and that, subsequent to spawning, 
their progeny have been driven shorewards into sunnier and 
warmer tidal sand pools containing appropriate weeds for an- 
chorage. Ceramium is often associated with Zostera, and in 
this connection the young of Haliclystus, initially, may be 
more at home on slender Ceramium filaments than on bioad 
Zostera blades. 
Messrs. Walmsley and Wilson, of the Marine Laboratory, 
found young specimens of Haliclystus on Ceramium in Robin 
1913 Oct. 1. 
