156 On the Vvhjzoa of the St. Lawrence. 



Porella conciima, Busk (granular var.). 

 (PI. VIII. iig. 6.) 



I liave already referred to the variability of this species in 

 superficial character. The figure rej)resents a highly granu- 

 lar form, which I had supposed to be (probably) the Lepralia 

 Belli of Sir J. W. Dawson *. The latter indeed is described 

 as having a sinuated oriHce, a character which does not be- 

 long to any variety of P. concinna. Still it seems more than 

 probable, taking all things into consideration, tliat L. Belli 

 is nothing more than a form of this variable species. Speci- 

 mens are of common occurrence in which the cells are 

 separated by a distinctly " sinuous furrow," which is one of 

 the diagnostics of Sir W. Dawson's species. 



Cellepora canaliculata, Busk. 



Celtepora canaliculata, Busk, 'Challenger' lleport, part i. p. 204, pi. xxx. 

 tig. o. 



This species seems to be not uncommon. It forms small 

 nodular masses, which incrust the stems of llydruida. It 

 was first obtained on the * Challenger ' voyage in the neigh- 

 bourhood of Halifax, Nova Scotia, in 51 fathoms. 



The ooicium was not observed. It is globose, of compara- 

 tively large size, much broader than high, rather prominent 

 in front, oral arch wide and shallow, surface smooth, shining, 

 entire. 



hagenipora spinulosaj Hincks. 



Lo(/e)ii)>ora spifiHlosn, Ilincks, " Polyzoa of Q.iieeu Cliarlotte I^liuul.-i,'' 

 ]). .'Jl (Sep.) aiul 40 : ' Aunals,' ser. 5, vol. xiii. pi. iii. tig. 4, and pi. ix. 

 Iig. 4. 



This very interesting form occurs abundantly. It has 

 only been noticed previously amongst Dr. (Jr. M. Dawson's 

 drcdgings from the Queen Charlotte Islands. It is probably 

 an Arctic form. The St.-Lawrence specimens hitiierto met 

 with are all crustaceous in habit, overspreading the stems of 

 llydroida. The erect branching form obtained at the Queen 

 Charlotte Islands has not occurred. 



Smittia Landshoroviij Johnston. 



There has been some confusion about this species, aiul the 

 identification is not always to be trusted. Smitt has ranked 



* ' rontributious to Canadian Natural History,' by W. S. M. l>'L'rbau 

 and Hobcit \W\\; I'oly/oa, p. ol\ (lOxtractod Ironi tlio lupuit of tiio 

 Geological fcSurvcy for 1858: Montreal, 18()0. ) 



