74 



Y.I. KANTOR, A. MEDINSKAYA AND J.D. TAYLOR 



bm be 



F e blp 



btsi 



Fig. 21 Inquisitor aemula (Angas, 1877). A, semidiagrammatic longitudinal section of the foregut (salivary ducts not shown); B, longitudinal section of 

 the proboscis tip. 



Glands 



The salivary glands are medium-sized, paired and acinous, with the 

 ducts thick and coiled. The venom gland changes abruptly in histol- 

 ogy after passing anteriorly through the nerve ring. The duct of the 

 gland is unciliated, narrow, with thick muscular walls, and opens just 

 posterior to the buccal cavity. The muscular bulb is formed of an 

 outer layer of longitudinal muscle fibres, a connective tissue layer, 

 an inner layer of longitudinal fibres, which is ca. 2.5 times thinner 

 than the outer and finally, a thin, innermost layer of circular muscle 

 fibres. The epithelium lining the inner cavity is rather well devel- 

 oped and non-glandular. 



Odontophore and radula 



The odontophore is medium-sized, with the odontophoral cartilages 

 paired and unfused. The buccal sac is medium long and very narrow. 

 The radula (Fig. 17c) consists of marginal teeth of the wishbone 

 type, with a robust, solid, pointed, major limb and a smaller thinner, 

 minor limb. The marginal tooth is medium long, ca. 1 30um (0.6% of 

 SL, 2.3% AL). 



Inquisitor aff. adenicus Sysoev,1996 

 (Fig. 17d) 



Rhy nchodeum and proboscis 



The rhynchodeal sphincter is medium large and anteriorly located. 

 The epithelium of nearly whole the rhynchodeum is glandular and 

 for only about one quarter of the posterior portion is it continuous 

 with that of the proboscis wall. 



The proboscis is long, and occupies the entire rhynchocoel in one 

 specimen and about half of it in the other. The proboscis walls are 

 thick, and compose about 25% of proboscis diameter. The mouth is 

 very narrow and lined with probable sensory epithelium. The mus- 

 cles of the proboscis wall are equally developed along its length. The 

 anterior buccal tube sphincter is very small and hardly visible, but 

 the intermediate buccal tube sphincter is large, and lies at a distance 

 of more than two marginal tooth lengths behind the mouth opening. 

 The sac-like enlargement of the buccal tube is well developed, and 

 lined with tall epithelium, which in one specimen forms a pad with 

 a marginal tooth attached to it. The buccal tube has thin walls, about 

 3-4% of proboscis diameter, lined with a tall epithelium. The buccal 

 lips are very small. 



Buccal mass and odontophore 



The buccal mass is short, about one third of proboscis length and lies 

 posterior to the base of the proboscis. It is uncurved, with rather thin 

 walls and a broad inner cavity. Several folds of the walls project into 

 the buccal cavity. The buccal mass lies posterior to the proboscis 

 base. The oesophagus is greatly elongated between the buccal mass 

 and nerve ring, forming a long loop. 



Glands 



The salivary glands are acinous, with thick, uncoiled ducts. The 

 venom gland changes abruptly in histology after passing through the 

 nerve ring. The duct of the gland is narrow and unciliated, with thick 

 muscular walls, and opens just posterior to the buccal cavity. The 

 muscular bulb is large and long, with its wall formed of two nearly 

 equal layers of circular muscle fibres, divided by a connective tissue 



