140 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



integuments are full of short, rod-like spicules. On opening the body- 

 cavity, the intestines -were found to be much hardened and badly 

 preserved in both specimens. 



There is a labial armature of two small brownish plates. They are 

 rather faint and not at all strong. They are composed of scale-like 

 elements, and resemble the mosaic found on the masticating edge 

 of Tritonia rather than the labial plates usual in Discodoris (Fig 3). 



The radula consists of 46 rows, each containing from 65 to 70 teeth 

 on either side of the narrow, bare rhachis. The innermost teeth are 

 smaller, and often cross one another over the rhachis, so as to give 

 a false impression of median teeth. The outermost teeth are degraded 

 and plate-Hke, but not serrulate. The rest are hamate, moderately 

 bent, and moderately tall. There are a few bitid teeth, but they 

 appear to be merely monstrosities. 



The blood-gland is white. The central nervous system is not well 

 preserved, but appears concentrated. 



The state of preservation renders it impossible to make any certain 

 statements about the digestive and reproductive organs. There 

 appeared to be a distinct stomach, external to the liver, but I could 

 not find the usual layer of the hermaphrodite gland spread over the 

 liver. The male branch of the reproductive system terminates in 

 a pouch containing the much convoluted vas deferens. In both 

 specimens the efferent genital ducts seemed to bear colourless scales or 

 prominences, so thin and transparent as to be almost invisible. 



In the uncertainty as to many of the internal organs, I do not think 

 it worth while to create a new species for these specimens. They are 

 not certainly identifiable with any described form, but may possibly 

 represent a variety of one of the Mediterranean Discodorids or 

 Paradoris. 



Geitodoris, Bergh.' 



This genus resembles Rostanga in many points, on the one hand, 

 and, on the other, comes very near to some of the Archidorids, such as 

 A. testudinaria, which I identify with the A. stellifera of Vayssiere 

 and von Ihering. In this form the teeth grow longer and thinner 

 towards the end of the row, though not so sharply differentiated as in 

 Geitodoris, and, according to Vayssiere, a labial armature is present. 



The Doris planata of Alder & Hancock probably belongs to this 

 genus (v. Eliot, I.e.), and is possibly not really distinct from the 

 type species G. complanata (Verrill) from the coast of New England. 

 Two other species have been described by Bergh, G. immunda from 

 Panama and G. mollina from the West Indies. The latter does not 

 entirely conform to the type of the genus. 



Geitodoeis reticulata, n.sp. PI. XIV, Figs. 4, ba, 5b. 

 Mr. Crossland's notes on the living animals are as follows : — 

 "August 16. At St. Vincent. Found under a stone in company 



I Vide Eliot, Joum. Mar. Biol. Assoc, vol. vii (1906), on Archidoris testudinaria 

 and Geitodoris planata. 



