Ausfndian K<i rtlnvoriuK. 251 



epithelium consists of short and long cells, alternating in groups. 

 The muscle layers are distinct, and a fair blood supply. Cal- 

 ciferous glands are connected to the median canal by short 

 ducts. The lining of the glandular portion is drawn into long 

 thin folds, as in C ryptodrilus sarcarius. (See below.) The 

 muscular tissue is well developed, and there is a flat peritoneal 

 membrane. 



4. — Cryptodrilus saccarius, Fletciier. Proc. Linn. Soc. 



N.S.W., 1886. 



Plate LI., Figs. 13, 17 and 18. 



(a) Macroscopic. — Buccal cavity and pharynx in segments 1-3. 

 Crop in 4. Gizzard in 5. Oesophagus in 6-14, being simple in 

 6-8, and also in 14. In 9-13 get five pairs of calciferous glands, 

 each gland being separated from the median by a distinct duct 

 of considerable length. The glands are bean-shaped, and each 

 has a large vessel running along its length on the dorsal surface 

 [Fig. 17]. Large intestine begins in 15, and is constricted in 

 each segment at the septa. 



(b) Microscopic. — Oesophagus has the usual structure in the 

 simple portion. Calciferous glands show very long folds of the 

 lining extending right across the lumen, and are richly supplied 

 with blood. The lining here was remarkable in its columnar 

 epithelium being ciliated, the cilia being visible with the low 

 power [Fig. 18]. In the ducts, also, cilia are present, but they 

 are much shorter here. A large number of goblet cells are mixed 

 with the columnar. The median portion of the oesophagus in 

 the calciferous gland region, has columnar epithelium not drawn 

 into long folds, and shows a cuticle. 



5. — Fletcherodrilus unicus, Fletcher. 



Cryptodrilus unicus, Fletcher. Proc. Linn. Soc. 

 N.S.W., 1889. 



Plate LI., Fig. 14, and Plate XLYIIL, Fig. 2. 



(a) Macroscopic. — Buccal cavity and pharynx in segments 1-4. 

 Crop in. 5. Gizzard in 6. Oesophagus simple in segments 7 and 



