20 



Fetch : Shore Collecting at Withernsea^ etc. 



common ; Syncoryne eximia Allman, one colony ; *Coryne 

 piisilla Gaertner, several ; Obelia gelatinosa (Pall.), abundant 

 but small; '•'Sertularia filicula E. and S., a well-grown 

 colony covering- a stone a foot in diameter ; "^Calycella syringa 

 (Linn.), on Coryne. Polyzoa — Memhranipora lacroixii Hincks, 

 abundant on stones ; "^M. flemingii Busk, rare ; Miicronella 

 peachii (Johnst.), moderateh' common ; ^ Bicellaria ciliata 

 (Linn.), small colonies on stones covered with M. lacroixii. 

 Polychffita — "^'Lagisca floccosa (Sav.), Lanice conchilega (Pall.). 

 Mollusca — Littorina littorea (Linn.), Purpura lapilliis (Linn.), 

 Gibhiila cineraria (Linn.), Lacuna divaricata (Fabr.), Mytilus 

 edulis Linn., * Laniellidoris aspera (A.&H.). Pisces — "^Centro- 

 notiis gunnellus. 



Laviellidoris aspera is recorded by Alder and Hancock as 

 common at Whitby (Forbes and Hanley, Vol. IIL). Limnoria 

 lignornm, the g-ribble, is a well-known destroyer of submerg-ed 

 timber, and is described by Spence Bate and Westwood as ' one 

 of the most destructive creatures to be found amongst the 

 whole of the articulated animals.' They record that 'it was 

 observed by Mr. Spence at Bridling-ton Bay, near Hull' (H., 

 354). It does not seem to have been observed in the Humber. 

 In the present instance dozens were found in a piece of drift- 

 wood wedged between the boulders, and it was interesting to 

 note how closely the terminal segment fitted the curve of the 

 burrow, probably thereby preventing excessive loss of moisture 

 when not submerged. Tubular ia indivisa here had dwarfed stalks 

 (about two inches), and larger heads than usual ; Obelia gela- 

 tinosa was found on most of the stones, but the only large 

 specimens grew in a miniature, alga-fringed rock-pool on the 

 top of a boulder. On the dilapidated groynes at Withernsea 

 were Balanns balanoides (Linn.), Tubularia indivisa, and a few 

 mussels and periwinkles. 



A visit to the skerries between Easington and Kilnsea on 

 27th July illustrated the changeable character of the shore. 

 Most of the boulders and clay pools were hidden beneath the 

 sand. In the few remaining pools several specimens of "^Dendro- 

 notus frondosus (Ascanius) were found among'st Tubularia , a 

 habitat previously noted by Hincks (Brit. Hydroid Zooph}'tes, 

 p. 117). Phoxichilidiuni coccincuni (Johnst.) was moderately 

 common, and a single specimen of another pycnogcnid, near 

 Anitnothoa, was taken. As at Withernsea, Lagisca floccosa, 

 Centronotus gunnellus, and Idotea marina were found, and in 

 addition the Crustacea, Amathilla homari (Fabr.), *Metopa alderi 



Naturalist, 



