A HISTORY OF SUSSEX 



mined. Judging from memory however 

 they corresponded precisely with Chun's 

 figure of P. rhodopis, and cannot be 

 referred to the balloon-shaped Hor- 

 miphora plumoia. Length, about if inches. 

 Hastings. 



76. (?) Horniiphora plumoia. 



Specimens resembling this genus in shape 

 and somewhat larger than Pleurobranchia 

 pileus have been taken at Hastings, but were 

 not examined sufficiently for identification. 

 Hastings. 



77. Bero'i ovata, Eschscholtz. 



This species is filbert-shaped, and has 

 been taken in the immature condition. 

 Specimen transparent, colourless, | inch in 

 length. In this genus the circulatory 

 canals unite at the aboral pole, and in the 

 region of the pores there are ciliated ten- 

 taculoid processes, lobed and branched. 

 Hastings. 



VERMES 

 CEPHYREA 



1. Sipunculus, Pallasii.t 

 Brighton. 



ANNELIDA 

 HIR U DINE A 



2. Pontohdella muricata. 



This species has suckers at both extremi- 

 ties ; there are neither feet nor bristles. 

 The rings are strongly marked, and are 

 studded the whole way round with conical 

 warts, each ring somewhat resembling a 

 well-armed dog collar. Colour, a dull bufF 

 with spots of brown at regular intervals. 

 Trawled ; rare. Hastings. 



POLYCHMTA 



AURICOMID^ 



3. Pectinaria helglca. 



This species forms beautifully made 

 sand tubes, the sand grains being cemented 

 together by an excretion, the structure 

 resembling mosaic work. The tubes are 

 straight, conical, and very regular. Com- 

 mon. Hastings. 



4. Pectinaria arenaria.f 

 Brighton. 



5. Sahellaria crassiss'tma. Link.* 

 Very common. Hastings. 



6. (?) Sahellaria alveolata.* 

 Common. Hastings. 



7. Siphonoitoma, sp. 



Specimen about 2^ inches in length, 

 greyish-brown in colour ; much enlarged 

 towards the head. The setas become very 

 long in the region of the mouth and 

 project in front. The body is covered 

 with small papillae. Trawled. Hastings. 



Terebellid.5: 



8. Terehella lit tor a lis, Dal. 



This species, in the adult state, forms 

 membranous tubes with agglutinated par- 

 ticles of sand and shell. The tubes are of 

 considerable length and have a fringe of 

 smaller branching tubes arranged in a 

 radiating manner around the anterior end. 

 Very common upon the shore. Hastings. 



9. Terehella maculata.* 

 Hastings. 



10. Terehella conchilega.\ 

 Brighton. 



Sabellid^ 



1 1 . Sahella penicillus.* 

 Hastings. 



1 2. Sahella tuhularia.* 

 Hastings. 



13. Myxicola infundihulum. 



Animal white, i^ inches long, tapering 

 to the posterior end, and with a slight 

 depressed line running down the dorsal 

 and ventrical sides. Setse minute. The 

 pectinated plume-like gills are arranged 

 around the mouth, and curve gracefully 

 over towards the centre. Trawled ; rare. 

 Hastings. 



SERPULIDi* 



14. Serpula contortuplicata. 



Annelid forming a calcareous tube, cir- 

 cular in section, much twisted and often 

 aggregating together in involved masses. 

 Animal with a flat-topped operculum. Very 

 common upon shells and rock. Hastings. 



15. Serpula triquetra. 



This species inhabits a calcareous, ser- 

 pentine tube cemented to shells and stone. 

 Running down the back of the tube is a 

 ridge or keel, and the base of attachment 

 is spread out, so that a section would be 

 somewhat triangular in form. The oper- 

 culum is conical and generally furnished 

 with two or three spines. Very common. 

 Hastings. 



