184 On the Invertebrate Fauna of St. Andrews. 



Gonozooids belonging to a species of Thjhocodon were 

 obtained in considerable numbers in the bottom-nets in April 

 and May 1890. Their occurrence suggests the presence of a 

 second species of Corymorpha in the bay. 



SiPHONOPHORA. 



Two examples of a form allied to Agalmopsis, but appa- 

 rently undescribed, were taken in the bottom-net in May 1890 

 in com])any with Thjhocodon. I have handed over the speci- 

 mens of both these forms, together with such notes and 

 drawings as I made of them, to the Rev. A. D. Sloan, M.A., 

 B.Sc, who is making a careful investigation of them *. 



Gastropoda. 



PJeurophyUidia Loeveni^ Bergh. 



Specimens of this rare British mollusk were obtained for 

 the first time froin the haddock-lines from the mouth of the 

 bay in the autumn of 1889 and in April 1890. 



Idalia aspersa (A. & H.). 



On examining a large }[olgula arenosa brought up by the 

 haddock-lines from the sandy ])art of the bay a specimen of 

 this rare mollusk was found to have effected a lodgment 

 inside tlie test^ which was somewhat torn. 



Tritonia Ilomhergii (Cuv.). 



A perfectly white specimen was brought in on the liaddock- 

 lincs in the spring of 1890. Tlie mollusk is not rare in the 

 neifflibouriiood of the Bell Hock. 



"O" 



Enteropneusta. 



A few Tornaria larvaj were taken at tlie surface on the 

 6tli and 7th August, 1890. Tlicy appeared to be identical 

 with those described by Bourne from Plymouth, which are 

 the only others recorded from British waters. Balanoglossiis 

 is not known to occur anywhere in the neighbourhood of 

 St. Andrews. 



EXPLANATION OF TLATE XI. 

 Fig. 1. Calif/m rapax, -with opizoic Hvmiophn/a Dah/eUi, sp. u. 

 Fiys. 2-4. Animals and portions of tlio tubes of the last-named in varioua 



states of expan.sion ; more hijridy masrnitied. 

 Fiijg. G & 7. Lateral and anterior views of Piluliiaii larva. /?, daji^ellum ; 



p.s.ci., prostoniial disk ; st., stomach. 



• Vide Ann. & Mair. Nat. Hist., May 180L 



