163 



PEINCIPAL SPECIES OF THE GENUS 

 SILIQUARIA, Brug. 



{Tenagodus, Schum.) 



Testa tubuliformis, insequaliter spiralis, spiraliter inciso- 

 fissurata ; versus aperturam irregulariter coDtorta. Operculum 

 corneum multilaminatum. 



The Siliquarige are, like Serpulee, spirally coiled ; often more 

 or less closely towards the apex ; loosely and irregularly after- 

 wards. They are distinguished from Serpulae by an incised 

 fissure along the upper part of the tube, either simple or 

 articulated. Our list is necessarily incomplete, because many 

 of the species described by Morch are unknown to collectors, 

 and appear to be founded on slight and interchangeable 

 characters. 



Species. 



1. OBTUSA, f. 3, 4, Schumacher. — Tuba lata, spiraliter 

 striata crassiuscula, pyramidaliter spirata, nonnunc^uam versus 

 apicem cylindrica, anfractibus approximatis, intra loevigatis, 

 extra concentrice inciso-rugatis, versus aperturam lasatis ; 

 fissura integra. — The normal form is represented by f. 4, but 

 f. 3 represents the variation which gave the original name 

 ' obtusa ' to the species, the whorls being coiled closely near 

 the apex and forming a cylinder. The fissure is simple. 

 The name ' anguina ' has been erroneously applied to this 

 species; it belongs to sp. 13. 



2. ATJSTRALis, f. 7, 8, Quoy. — Quam S.uhtusa striis spirali- 

 bus crassiores, concentricis, vix incisis ; fissura fills septi- 

 formibus interrupta, marginibus elevatis, versus aperturam 

 simplici. — The Mediterranean species has the slit simple and 

 open, but the Australian shells have it articulated by little 



