10 Art. 4. — S. Goto and H. Kikuchi : 



The penis is accompanied by a solid sigmoidal supporting 

 chitinous rod of about the same length, lying roughly parallel to 

 it. In three of the five specimens measured for the purpose, the 

 length of the penis was 96/*, while in the other two it was 

 respectively 103// and 84/i, the curvature not taken into account ; 

 that of the supporting rod is only slightly less. The basal end of 

 the penis is set on a globular mass of compact connective tissue, 

 surrounded on all sides by very loose fibrous tissue. 



Together with the vas deferens open at the base of the penis 

 two accessory {prostate) glands, which may be distinguished as the 

 anterior and posterior. The anterior prostate glands are unicellular 

 and very extensive; the cells occupy the dorsal side of the body 

 immediately under the dermal musculature and lie between the 

 salivary glands and the genital opening or may extend a little 

 further backwards; they are more or less pyriform and may 

 measure 25/^ by 31/", or less according to the stages of their 

 secretory activity (fig. 1, 6, 8). The cell contents are coarsely 

 granular and stain fairly well with haematoxylin and orange; the 

 nuclei are small and vesicular and mostly contain each a single 

 chromatin mass. Each of these gland cells sends out a duct, 

 which unites .shortly before 'the genital opening with those of 

 the other cells into a small duct with a thick wall; this duct runs 

 backwards side by side with the vas deferens, and undergoing a 

 swelling on the way, again becomes a fine tube and opens at the 

 base of the penis (fig. G). The posterior prostate gland is an 

 irregularly lobulated organ lying mostly on the left side of the 

 median line, between it and the intestinal coeca, immediately 

 behind the anterior glands and partly overlapped by them; it is 

 a mass of large cells with coasely granular contents like those of 

 the anterior glands but staining on the whole less well with 

 haematoxylin; the nuclei are mostly comparatively small and 

 vesicular and usually contain each a well defined chromatin mass 

 (fig. 1, G, 7). The duct of this gland is fine and less distinct 

 than the terminal duct of the anterior glands, but is still perfectly 

 definite, and after a short forward course opens at the base of the 



