204 LITERATURE OF THE SCAPHOPODA 



the posterior aperture. Genera Dentalium, Linnaeus ; posterior orifice 

 of the shell truncated, entire, without an incision or accessory tube. 

 AntaliS) Adams ; posterior orifice with a short incision. Fissidentalium, 

 Fischer ; posterior extremity with a long fissure on the ventral side ; 

 F-ustiaria, Stoliczka. Schizodentalium, Simroth ; ventral border 

 of the posterior aperture with a series of small 

 holes arranged in a straight line. Heterochisma, 

 Simroth. 



FIG. 186. FAMILY 2. SIPHONOPODIDAE, Simroth. 



Cadulus gracttis, Jeffreys, shell, Foot expanded distally into a symmetrical disc, 



left view, a anterior orifice; w j t h a crenate continuous edge (Fig. 183) or 



p, posterior orifice. (After Wat- . _ 6 j i i 



son.) simple and vermiform without well-developed 



lateral processes ; shell often contracted towards 



the anterior aperture. Genera Siphonodentalium, Sars ; foot ending 

 in a median disc without a median appendage. Cadulus, Philippi 

 (Fig. 186). Dischides, Jeffreys. Pulsellum, Sars ; terminal disc of the foot 

 with a median appendage. Entalina, Monterosato. 



LITERATURE OF THE SCAPHOPODA. 



1. Boissevain. Beitriige zur Anatomie und Histologie von Dentalium. Jenaische 



Zeitschr. xxxviii. 1904. 



2. Clark, W. On the Animal of Dentalium tarentinum. Ann. and Mag. of 



Nat. Hist. (2), vii. 1851. 



3. Deshayes, G. P. Anatomie et monographic du Genre Dentale. Mem. Soc. 



Hist. Nat. Paris, ii. 1825. 



4. Fol, H. Sur 1'anatomie microscopique du Dentale. Arch. Zool. Expe'r. et 



Ge"n. (2), vii. 1889. 



5. Kowalewsky, A. Etude sur 1'embryoge'me du Dentale. Ann. Muse'e d'Hist. 



Natur. Marseille, Zool. i. 1883. 



6. Lacaze-Duthiers, F. J. H. Histoire de I'organisation et du de"veloppernent 



du Dentale. Ann. des Sci. Nat. Zool. (4), vi. vii. 1856-1857. 



7. Lton. Zur Histologie des Dentalium Mantels. Jen. Zeitschr. f. Naturw. 



Bd. xxix. 



8. Nassonow. Zur Morphologic der Scaphopoden. Biol. Centralbl. x. 1890. 



9. Plate, L. Ueber den Bau und die Verwandtschaftsbeziehungen der Soleno- 



conchen. Zool. Jahrb., Abth. f. Anat. u. Ont. v. 1892. 



10. Sars, M. Om Siphonodentalium vitreum, en ny Slaegt og Art af Dentali- 



dernes Familie. Universitets programm. Christiania, 1861. 



11. Malakologiske Jagttagelser II. Nye Arten af Slaegten Siphonoden- 

 talium. Forh. Vidensk. Selsk. Christiania, 1865. 



