178 CALIFORNIA ACADEMY OF SCIENCES. 



PLATE XLVII. 



BENHAMIA NANA. 



7. A somewhat diagrammatic figure representing the anterior part of a specimen sectioned lengthwise, composed 



from several seutions, showing the location and size, etc., of various organs, x. beginning of the mnscnlar 

 part of the spermduct. 



8. Cross-section throngh the most anterior part of the body, through prostomium and buccal division, showing 



the pharyngeal glands in four distinct divisions. The section is anterior to the cephalic ganglion. 



9. Section posterior to the former, through somite ii. 



10. Section through somite vii. 



11. Section through somite xiv; the cnlciferoiis gland with the intestine belongs to somite xiv; the ovary to xiii. 



The section passes just in front of the oviduct, x. the limit of the clitellum. 



12. Section through somite xvi. The cnlciferous diverticula belong to somite xv. 



13. Section throngh somite xvii and the anterior prostate pore. x. ending of clitellar cells. 



14. Section through somite xx, showing the typhlosole. 



15. Longitudinal section through the most anterior part of the body, showing the projected pharyngeal division 



with the gland ducts, phx. pharyngeal division. The dark line indicates the row of discharge chambers of 

 the ducts from the glands. A more magnified view is represented in lig. 18. 



16. A couple of strands of the unicellular salivary septal glands with their muscles. 



17. Some of the septal unicellular glands more highly maguitied. 



18. Section through pharynx, showing the discharge ducts and pockets from the septal and pharyngeal glands. 



19. Lining of the cesophagus below the salivary glands, showing its exceeding thinness. 



20. Longitudinal section through the body-wall, showing the sense organ region in the equatorial line of the 



somite, c. e. central lumen or organ proper, in which are seen the sense cells, together with nuclei of 

 supporting cells. These supporting cells are surrounded by peculiar lunate or sac-like transparent cells, also 

 found in the sense organ of the pharynx, n. c. nerve cells and their nuclei. 



21. Longitudinal section throuj;h gizzard, showing glands with their discharge tubes and small terminal pockets. 



22. Section through the alimentary canal between the two gizzards, showing glands, c. cluster of lunate cells 



surrounding a lumen. 



23. Longitudinal section of the tubular intestine from somite xvi. h. r. unicellular glands, hi. s. blood sinus. 

 24i. One of the lobes of the typhlosole, showing distribution of glands, some of which are dark staining, others 



not. 

 24b. Section through the intestine adjoining the typhlosole. 



25. Two glandular cells from the former section, more maguitied. The two glands belong to different types. 



26. A pair of calciferous diverticula from xiv. The right-hand gland is much smaller, which is an exception, as 



generally they are of equal size. 



27. Detail of a section of lamella from one of the anterior calciferous diverticula. 



28. Two cells more highly magnified. 



29. Section through one of the posterior calciferous diverticula. 



30. Part of the same more highly magnified. Zeiss Hom. Im. Eyp., 2. 



31. One of the prostates with sac with penial setie. 



32. Cross-section through glandular part of prostate. 



33. Part of a penial setiu near the apex; the latter is broken. 



