SÜBCLASS II 



DIBRANCHIATA 



685 



addition to the cight arins, hvo long tentacles vnthout hooJcs arc ijlaced between the third 

 and foitrth pairs. Oligocene to Recent. 



^ ,#. 



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Fig. 1326. 



.(, PhragmoteutMs bisintiMta 

 (Bronn). Trias ; Raibl, Car- 

 inthia. Ph, Phragmacone ; l'o, 

 ProostracTim ; L, Lateral area 

 of proostracuin ; d, Ink-bag. 

 B, Hooklets of arnis, i/i (after 

 Suess). 



Fio. 1327. 



Bclcinnoteuthis antiqua 

 Pearce. Oxford Clay ; Chris- 

 tian Malford, Wilts. A, Partly 

 restored specimen, i/.j. oc, 

 Eyes ; m, Mantle. " Other 

 letters as in Fig. 132(i. B, 

 Hooklet, -^/i (after Mantell). 



Fio. 1328, 



Bdemnoteuthis sp. Oxford Clay ; Gam- 

 melshausen, Würtemberg. A, ü, Dorsal 

 and ventral aspects. B, Septum and 

 siphuncle. 



Fig. 1329. 



SpiruUrosim bellardü (Mich.). Mio- 

 cene ; Superga, near Turin, Italy. A, 

 Side View. B, Longitudinal section. R, 

 Guard ; Ph, Phragmacone. i/j (after 

 Munier-Chalmas). 



SpiruUrostra d'Orb. (Fig. 1329). Shell composed of a 

 short triangulär pointed guard, which is excavated anteriorly 

 for the reception of the chambered phragmacone. The latter 

 begins as a spiral, but speedily becomes straight, and has 

 sejita pierced on the concave ventral side by the marginal 

 siphuncle. Only one species. Oligocene of Westphalia and 

 Upper Miocene of Turin. 



SpiruUrostrina Canavari. Like the preceding, but guard 

 reduced to two small, lateral wing-like appendages. Neocene 

 of Sardinia. 



SpiriUa Lain. (Fig. 1330). Shell thin, guard wanting. 

 Chambered phragmacone enrolled with the ventral side 

 concave, the coils not in contact, composed of nacreous sub- 

 stance ; septa concave ; protoconch globular 

 ventral and marginal in position, the septal necks directed "lencement of siphuncle; 



ö A T-, . 1 -r. ?'> Prosiphon ; .<!, Sii)huncle 



backwards between the septa. Prosiphon present. Recent ; (after Munier-Chaimas). 



Fig. 1330. 



Spinila peronii Lara. 

 Recent ; Pacific. Longi- 

 c,- -r 1 tiidinal section, i/i. a, Pro- 

 biphuncle toconch ; c, Caecal com- 



