83 191 



In the skin of the back calcified cells were found scattered, sometimes reddish yellow, 

 sometimes irregular. 



The (slightly reddish-) yellow pharyngeal cone which almost quite filled the 

 buccal tube, was 2 - 5 mm long, truncately conical; the common, strong retractors were 

 attached at its base; through its cavity stretched just to its point the continuation of the 

 bulbus pharyngeus, and along the latter the efferent duct of the secondary salivary 

 gland (Gl. ptyalina). This gland which was situated under and behind the pharyngeal 

 cone, was of a reddish gray colour, (3"™»] broad, and consisted of two halves adjoining 

 each other. The continuation of the bulbus pharyngeus which projected somewhat 

 bent from the depression at the hinder end of the pharyngeal cone, was yellowish, of a 

 length of T™ 111 , cylindric, with the common triangular aperture. At its hinder end were 

 found the (slightly reddish) yellow, oval, somewhat flattened salivary glands (gl. sali- 

 vates). The thicker oesophagus which showed several constrictions, was 6™™ long. The 

 posterior visceral mass (the liver) was irregularly conical, of a length of 12 mm , by a 

 breadth anteriorly of T 1 ™ 1 , and a height of ß'o 111111 ; the slit in the hinder end was 4 mm long; 

 the colour was reddish gray; its cavity (the stomach) was wide. 



The pericardium was as usual; the blood gland reddish gray. 



The anterior genital mass had a roundish- quadratic contour, was biconvex, 

 and had a length and height of 5 mm by a thickness of 2> mm ; it was reddish yellow and 

 yellow. The globular spermatotheca had a diameter of 2 , 5 mm . the spermatocyst was much 

 smaller, strutting with sperm; the uterine duct as usual long and with many windings. 

 The prostata was large, with several bends, continuing into the thin, highly wound seminal 

 duct, the end of which (as also the end of the vaginai duct, the vagina) was red brown. 

 The strong bag of the penis was 2 - 5 mm long, black at the base; the yellowish glans was 

 cylindric, somewhat broader at the base, O'âî 111 ™ long by a diameter in the middle of 

 0-iQmm. xhe glans in the greater length of its outside (fig. 16), was provided with about 

 20 series of (quincuncial) hooks; this armature continued further to a length of 2 mm into the 

 seminal duct (fig. 16). The sligthly yellowish hooks had the form common in the Doriopsidae, 

 and had a height of up to 0'02 mm , and they showed also irregularities as in other species. 



The examined form, no doubt, belongs to the Doriopsis rubra, which is very 

 common in the Indian Ocean. 



2. Doriopsis nigra (Stimps.) var. nigerrima. 

 R. Bergh, malacolog. Unters. Heft XVII. 1890. p. 963— 964. 



PI. II, Fig. 17. 



One specimen of this species, which is widely spread in the Indian Ocean , the 

 Indo-Chinese Sea, and the Japanese Sea, was taken on Jan. 2 nd 1901 at Lem Ngob. 



