370 REFORT OF COMMISSIONER OF FISH AND FISHERIES. [160] 



lamella?. Two very large, oblong, accessory nidaniental glands (xx) lie 

 side by side, loosely attached, nearly in tbe middle of the ventral side, 

 covering and conceabng tbe beart and most of tbe renal organs; eacb 

 of these has a groove along the ventral side and a slit in the anterior 

 end ; internally they are composed of great numbers of thin lamellae. 



In front of and partially above tbe anterior ends of these, and attached 

 to tbe intestine and ink-sac, there is another pair of accessory glands (x), 

 roundish in form, with a large ventral opening, and having, in fresh 

 specimens, a curiously mottled color, consisting of irregular red and 

 dark brown blotches on a pale ground. Their internal structure is finely 

 follicular. The ovary (ov) is large and occupies a large portion of the 

 cavity of the body, posteriorly, running back into tbe posterior cavity 

 of tbe pen, and in the breeding season extending forward nearly to the 

 heart. In the breeding season the thin convoluted portion of tbe ovi- 

 duct (ov 1 ) is found distended with great numbers of eggs. At the same 

 time the large glands (x 1 ), around the oviduct, and the accessory nida- 

 mental glands (a?, xx), destined to furnish the materials for the formation 

 of the egg-capsules, and for their attachment, are very turgid and much 

 larger than at other times. 



The male (PI. XL, figs. 1, 2) has no organs corresponding in position to 

 the two pairs of accessory nidaniental glands of the female, but the 

 single efferent spermatic duct (p) occupies the same position on the left 

 side as the terminal part of the oviduct of the female. It is, however, 

 a much more slender tube, extending farther forward beyond the base 

 of the gill, and its orifice is small and simply bilabiate. It extends 

 backward over tbe dorsal side of the base of the gill to a bilobed, long- 

 pyriform organ, consisting of a spermatophore-sac (ss) and a complicated 

 system of glands and tubes (pr, vd) united closely together and inclosed 

 in a special sheath. This organ consists of the following parts : 



1. The vas-deferens (vd), which starts posteriorly from a small orifice 

 (not figured) in the thin sheath of peritoneal membrane (pr) investing 

 the testicle (f); it passes forward along the side of the spermatophore- 

 sac, to which it is closely adherent, and throughout its length it is thrown 

 into numerous close, short, transverse, flattened folds ; anteriorly it joins 

 the vesiculae-seminales. 



2. The vesiculae-seniinales (fig. 2, pr, in part) consist of three large, 

 curved vesicles, closely coiled together, the third one having thickened, 

 glandular walls; from the latter goes a duct which unites with the duct 

 from the prostate gland to form the spermatic duct. 



3. The prostate gland (pr, in part) consists of two curved lobes, which 

 are closely coiled between and united to the vesiculoe-seminales. 



4. The spermatic duct, formed by the union of the ducts from the 

 vesicute seminales and prostate glands, is a nearly straight tube; it 

 passes backward between the prostate glands and spermatophore-sac, 

 close alongside of the vas-deferens (vd), to which it is closely bound 

 down ; it enters the spermatophore-sac (ss) near its posterior end, at an 

 acute angle. 



