8 MARINE INVERTEBRATA OF GRAND MANAN. 



twenty, short, curved, and witli blunt extremities. It was found at low-water 

 mark, adhering by its very small base to a large stone, from which it was easily 

 detached. In confinement, it attached itself to the bottom of the glass, but fre- 

 quently changed its place. Only one specimen was found, from which circumstance 

 the necessary anatomical investigations which would undoubtedly result in the 

 establishment of a new genus for this animal, could not be made. 



LUCERNARIAD^. 



LuCERNARiA QUADRicoRNis, Miill. L. fasdculwis, Johnston, Brit. Zoopli., pi. xlv., 

 f. 3-6. The specimen obtained was nearly three inches in length. It was dredged 

 on a bottom of nullipores and sea-collanders (Agarum) in four fathoms. It is the 

 first of this interesting genus yet noticed as occurring on our coast. 



acalephj:. 



PROLES POLYPOIDE^. 



Campanularia stringa. Lam. Johnst., 1. c, 110. On Sertularia iiolyzonias, in 25 

 fathoms, off Duck Island. 



Laomedea gelatinosa, Lamour. Johnst., 1. c, pi. xxi., f. 3. This I took from the 

 bottom of the hooker used in my dredging operations. It had reached the height 

 of an inch in less than a month after the bottom of the vessel had been scraped 

 clean. 



Plumularia TENERRiiUA, St., n. s. Polypidom pinnated, the stem thick, the pin- 

 nag very slender, alternate, with the pyriform cells arranged loosely in a row on 

 their upper surface, pointing alternately to opposite sides. It is common in 25 

 fathoms, shelly bottom, off the northern point of Duck Island. 



P. FALCATA, Lam., An. sans vert., ii. 160. Taken often in 35 fathoms on the 

 Hake Ground. 



Sertularia argentea, Ellis. Johnst., 1. c, 79. Common in 4-6 fathoms, 

 attached to stones. 



S. FiLiCTJLA, Ellis. Johnst., 1. c, 76. Dredged in 20 fathoms, on shelly bottoms. 



S. LATiuscuLA, St., n. s. Pinnse broad, compressed, attached by a slender base 

 to the main stem; cells crowded, nearly opposite, shaped as in S. argentea; vesicles 

 elongated, ovate, with a single strong spine on one side at the extremity. Color 

 brownish. Breadth of pinna, 0.03 inch. Dredged in the laminarian zone. 



S. PRODUCTA, St., n. s. Cells opposite, elongated, curving outward, with ovate 

 apertures. Vesicles slender, elongated, subtruncate, and covered with spines at 

 their extremities. It is of a bright silvery color. It differs from S. margareta, 

 Hassal, in having more numerous spines at the top of the vesicle, and none on its 

 sides. 



