600 



MOLLUSCA 



SUB-KINGDOM VI 



1250, 1251). Like Acanthoteuthis but smaller, and phragmocone not produced 

 into a long proostracum. Upper Callovian and Lower Cretaceous. 



FIG. 1249. 



A, Phragmoteuthis bisinuata, 

 Bronn. sp. Trias ; Eaibl, Car- 

 inthia. Ph, Phragmocone ; Po, 

 Proostracum; L, Lateral area 

 of proostracum; d, Ink-bag. 

 B, Booklets of arms, 1/1 (after 

 Suess). 



FIG. 1250. 



Belemnoteuthis antiqua, 

 Pearce. Oxford Clay ; Chris- 

 tian Malford , Wilts. A , Partly 

 restored specimen, 1/2- oc 

 Eyes ; m, Mantle. Other 

 letters as in Fig. 1249. B, 

 Booklet, 4/j (after Mantell). 



FIG. 1251. 



Belemnoteuthis, Pearce sp. Oxford Clay ; 

 Gammelshausen, Wiirtemberg. A, C, . 

 Dorsal and ventral aspects. B, Septum 

 and siphuncle. 



FIG. 1252. 



Spindirostra Bellardii, Mich. sp. Mio- 

 cene ; Superga, near Turin, Italy. A, 

 Side view. B, Longitudinal section. R, 

 Guard ; Ph, Phragmocone. Vi (after 

 Munier-Chalmas). 



Family 3. Spirulidae. Zittel. 



Shell reduced to a chambered phragmocone coiled into a flat 

 spiral, the coils not in contact ; situated in posterior part of the 

 body, and the greater portion contained within the mantle. In 

 addition to the eight arms, two long tentacles without hooks are 

 placed between the third and fourth pairs. Pliocene and Kecent. 



Spirulirostra, d'Orb. (Fig. 1252). Shell composed of a short 

 triangular pointed guard, which is excavated anteriorly for the 

 reception of the chambered phragmocone. The latter begins as 

 a spiral, but speedily becomes straight, and has septa pierced on 

 the concave ventral side by the marginal siphuncle. Only 

 one species. Upper Miocene of Turin. 



Spirulirostrina, Canavari. Like the preceding, but guard 

 p, Prosiphon; s, siphuncle reduced to two small, lateral wing-like appendages. Neocene 



offo-. \T n.; tl Y> r<iinivoa\ o A JT o 



FIG. 1253. 



Spirula Peronii, Lam. 

 Recent ; Pacific. Longi- 

 tudinal section, 1/1- > Pro- 

 toconch ; c, Caecal com- 

 mencement of siphuncle ; 



after Munier-Chalmas). 



of Sardinia. 



Spirula, Lam. (Fig. 1253). Guard wanting. Chambered phragmocone enrolled 



