REPORT ON THE RADIOLARIA. 865 



network with dimples on the outer surface of the shields. Either all the dimples or 

 only a part of them are pierced by a pore. The forty aspinal pores are united in pairs 

 in twenty larger dimples. The shell is usually very thick-walled and non-transparent. 



1. Dictyaspis solidissima, Haeckel. 



Doratuspis solidissima, Haeckel, 1862, Monogr. d. Radiol., p. 416, Taf. xxii. figs. 6-9. 



Surface of the shell with seventy to eighty funnel-shaped dimples, each of which is perforated 

 at the base by one or two small meshes ; twenty larger dimples in the centre of the plates (each 

 with two elliptical aspinal pores), and fifty to sixty smaller sutural dimples between them (each 

 with a single circular pore). All pores of nearly the same size. No blind dimples. Outer conical 

 part of the thick radial spines of the same length as the inner cylindrical part. Eadius of the 

 shell four times as large as the thickness of its wall. 



Dimensions. Length of the shell 012, breadth 01 ; length of the spines 0'06, basal breadth 

 0-012. 



Habitat. Mediterranean (Messina), surface. 



2. Dictyaspis favosa, n. sp. 



Surface of the shell with one hundred and seventy to one hundred and ninety deep funnel-shaped 

 dimples, seventy to eighty of which are perforated, the others blind ; among the former each of the 

 fifty to sixty smaller contains a single sutural pore, each of the twenty larger a couple of aspinal pores. 

 All pores of nearly the same size. Outer part of the compressed two-edged spines triangular, half 

 as long as the inner part. Radius of the shell six times as large as the thickness of its wall. 

 (Differs from Ceriaspis favosa, PI. 138, fig. 6, mainly in the ellipsoidal form of the shell and the 

 different size and form of the spines.) 



Dimensions. Length of the shell 016, breadth 013 ; length of the spines 0'04, basal breadth 

 0-025. 



Habitat. Central Pacific, Station 265, surface. 



3. Dictyaspis compacta, n. sp. 



Surface of the shell with one hundred and seventy to one hundred and ninety deep funnel- 

 shaped dimples, seventy to eighty of which are perforated, the others blind ; among the former each 

 of fifty to sixty each contain a single sutural pore, twenty each a couple of aspiual pores. All dimples 

 nearly of the same size, very .deep. Outer part of the compressed sword-like spines somewhat 

 longer than the inner part. Eadius of the dark shell only twice as large as the thickness of its 

 compact wall. 



Dimensions. Length of the shell 018, breadth 015 ; length of the spines 012, basal breadth 



0-02. 



Habitat. Central Pacific, Station 274, surface. 



(ZOOL. CHALL. EXP. PART XL. 1885.) 



