242 TROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



a quantity of smaller tubercles on the mantle -margin, not clearly 

 connected by ridges, and specially nunjerous and crowded over the 

 head. In both specimens there are three large tubercles between the 

 rhinophores. The dorsal integuments are full of small spicules, which 

 are not, however, visible to the naked eye, as in some allied forms. 



The rhinophores are yellowish, large, thick, and closely perfoliate. 

 The pockets are protected by two large tubercles, one on each side. 



In both specimens the branchial pocket is entirely closed by about 

 eight tubercles which meet over it, and, in both, the branchiae are five 

 in number, stout, bipinnate, and in some parts imperfectly tripinnate. 

 There is no doubt about this character, although Garstang describes 

 them as simple pinnate plumes, but it is quite possible that they may 

 vary in different specimens, and that this variation may take the form 

 of increased ramification, as the size of the whole animal increases. 

 The anal papilla has a crenulate edge, and rises a little behind the 

 centre of the branchiae. 



The foot is nearly as broad as the body, and has expanded lateral 

 margins. It is grooved in front, "with a slight notch in the upper lip. 

 The mouth is small, and on each side of it is a flattish tentacle. 



On the labial cuticle are two small patches of white rods, not 

 combined into a plate, not bifid, straight or slightly curved in the 

 centre. These patches are much more distinct in one specimen than 

 in the other. Vayssiere (Ann. Mus. Hist. nat. Marseille, vol. vi, 

 p. 20) mentions that St. verrucosa has "deux taches brunatres" on 

 the cuticle, representing the rudiments of jaws. 



The radula consists in one specimen of 37, in the other of 40 rows, 

 "with fragmentary remains of three or four others in front. In both 

 there are at most 75-80 teeth on each side of the rhachis. The teeth 

 are simply hamate, with rather blunt tips. They show no trace of 

 serrulation. Those at the inside and outside are smaller than the 

 others, and the two or throe outermost are irregular and rudimentary. 

 There are two large, reddish-yellow salivary glands. The stomach lies 

 wholly outside the large, yellowish hepatic mass, and its interior is 

 strongly laminated. The gall-bladder is large. 



The blood- gland is white, distinct, and in two divisions, of which 

 the posterior is larger. The central nervous system is as in Bergh's 

 plates of St. ocelligera (Semper's Keisen, Suppl., Heft ii, 1881). The 

 eyes are large and black. 



The reproductive system is much as in St. verrucosa. The retracted, 

 muscular verge bears some reddish spots, which do not, however, appear 

 to be thorn or scale-like growths. The larger spermatheca measures 

 5-5 X 4 mm., and is yellow ; the smaller 2 x 1*5 mm., and is reddish. 

 The mucous gland is large and yellowish white ; the albumen gland 

 smaller and deep yellow. 



I think this form can be safely referred to Staurodoris. This genus 

 is "well characterized in its typical forms, but passes on the one hand 

 into Archidoris, and on the other becomes very similar to Halgerda 

 and Dictyodoris. The present specimens are not unlike the animal 

 described by me as Halgerda Wasinensis (Proc. Zool. Soc, 1903, vol. ii, 

 p. 373), but the pockets of both the rhinophores and branchiae are 



