62 Transactions of the South African PJiilosojjhical Society. 



phores standing quite anteriorly ; the back quite even, but with man}' 

 small nodules at its junction with the margin. The gill-hole far 

 behind, with prominent margin ; the number of leaves of the gill 6. 

 The mouth a fine pore, no visible tentacles. The foot rounded in 

 front, the tail short. 



The central nervous system as usual ; tlie buccal ganglia (fig. 4) 

 much smaller than the salivary glands. The eyes 014 mm. in 

 diameter, with large yellow lens; the otocysts 0-10 mm. in diameter, 

 filled with otokonia. The skin full of spicules of the most different 

 sizes, form, and degree of calcification (fig. 3). The most of the long 

 spicules of a diameter up to at least 005 mm., mostly smooth, some- 

 times a little thorny, mostly clear, sometimes even blackish. In the 

 interstitial tissue masses of spicules; as also in the axis of the rhino- 

 phores, but almost none in the lamellae. 



The mouth tube about 4 mm. long, white. The glandula ptyalina 

 about 1 mm. broad, rather thick. The transparent hulbus i^Jiaryn- 

 geus (fig. 4a) unusually, nearly 17 mm., long by a general diameter of 

 0-4 ram.; at its hinder end the salivary glands rather large (fig. ibb). 

 The oesophagus i-ather short and wide (fig. 4c) ; the intestine 6 mm. 

 lonf. The liver a little flattened, in nearly its anterior half very 

 compressed by the anterior genital mass, yellowish white, 10 mm. 

 long by a breadth of 5, the cleft in the hinder end 1-5 mm. long. 



The hermaphrodite gland clothing the largest part of the liver, of 

 a similar colour, and with ripe genital elements in its lobules. The 

 large anterior genital mass yellow and white, 6 mm. long by a height 

 and breadth of 4. The form and the armature of the penis as usual 

 (figs. 1. 2). 



This form is specifically different from the D. spiculata.''^ 



3. Douiovsis c.EsiA, B. n. sp. 



An individual was taken by dredge near Roman Rock Lighthouse 

 (SE. \ S., 1| miles) from a bottom of sand and shells in a depth of 

 10 fms. 



The livinij animal is noted to have been " bluish." Preserved, it 

 was whitish with the margin of the back more grayish, the rhino- 

 phores yellowish. The length was 14 mm. by a breadth of 7-5 and 

 a height of 4-o ; the height of the rhinophores 2, the diameter of the 

 gill 4, the breadth of the brim of the back 3, the breadth of the foot 

 3 mm. 



• R. Hcrgh, Die Nacktschnccken dcr Siidsee. Journal d. ]\Ius. Godeffroy, 

 Heft xiv., 1878, p. H7. taf. ii., figs. 13 1.5. 



