36 HENRY B. BRADY. 



first of these objections is of little real weight, and the second 

 may depend on accidental breakage, a not improbable occur- 

 rence under the circumstances. Whilst still hesitating about 

 my specimens the Rev. A. M. Norman had obtained the same 

 species in his dredgings from the coast of Norway,^ and, 

 without knowing that I had been working upon it, had 

 assigned it in his own mind to the Foraminifera. He sug- 

 gested the name Jaculella as applicable to the genus, and I 

 am very glad to adopt it. 



The form and general appearance of Jaculella acuta is 

 shown in PI. Ill, fig. 12; and fig. 13 represents a specimen 

 ground down to show the interior. As has been said, it is 

 exceedingly rare to find a large individual with the thinner 

 extremity perfect, and the test is so hard and brittle that it 

 breaks away still more in process of grinding. 



The largest specimens of this species which have been met 

 with in the " Challenger" material are from Station 122 (off 

 the coast of Brazil, 350 fathoms), and some of these are a 

 third of an inch or more in length. Its range of distribu- 

 tion can hardly at present be satisfactorily laid down. 



G'ewws.— MARSIPELLA, Norman. 



Marsipella granulosa, ti. sp. PI. Ill, figs. 8, 9. 



Characters. — Test free, fusiform, tapering nearly equally 

 towards both ends ; composed of fine grey sand, with very 

 little calcareous cement. Cavity nearly uniform in diameter ; 

 walls thickest in the middle of the test. Exterior granular, 

 interior nearly smooth. Apertures simple, one at each end 

 of the test often tinged brown. Length f inch or more 

 (5 or 6 millim.). 



Amongst the Rhizopoda of the " Porcupine" Expedition is 

 a very striking species, common in certain areas, having an 

 elongate, fusiform test, often curved and twisted, especially 

 near the extremities, and usually tapering more rapidly at 

 one end than at the other. The test is formed of sand- 

 grains neatly fitted together, or, especially near the ends, of 

 acicular sponge-spicules, laid side by side and united by just 

 sufficient calcareous cement to produce a firm investment. 

 The extremities are both open, and serve as pseudopodial 

 apertures. Dr. Carpenter assigns this form to Williamson's 



' Mr. Norman also tells me that he dredged Jaculella in St. Magnus' 

 Bay, Shetland, in about 60 fathoms, in 1867, and it thus becomes an 

 addition to the British Fauna. 



