312 JOURNAL OF CONCHOLOGY, VOL. II, NO. lO, APRIL, IQod. 



The stomach is armed with three strong brownish-yellow plates, look- 

 ing much like small Chitons half rolled up. They bear about ten 

 furrows on the dorsal-surface. The second stomach is studded with 

 minute grey prominences. 



The living animal corresponded pretty closely with Pease's descrip- 

 tion of his Hamincea simillt/na, though not entirely agreeing with his 

 figure. The species seems allied to H. natalensis, recorded from 

 Natal, Mauritius, and Mozambique, which has also a narrow radula, 

 but there seem to be specific differences in the teeth, shell, and 

 stomach plates. The external appearance of H. natalensis when alive 

 is unknown. 



Newnesia antarctica E. A. Smith. 



Smith, "Southern Cross" Collections, Mollusca (Brit. Mus.) 1902, 



pp. 208-9, P^- XXV., figs. 1-6. 



Mr. E. A. Smith has kindly allowed me to examine four specimens 

 of this interesting Mollusc dredged by the "Southern Cross" off Cape 

 Adare. They are not in very good preservation, the tissues having 

 become soft and partially decayed, but the main features of their 

 anatomy seem quite clear. The shells of all have been removed, 

 together with a portion of the visceral mass, but are described in the 

 paper cited above, and said to resemble those of Hydathia 

 {Aplustrum). 



The bodies are of a uniform dirty yellow, and all of much the 

 same size, being about 21 mm. in length, 15 mm. in height, and 

 13 mm. in breadth. There is a large head-shield, somewhat curved 

 inwards in front, and prolonged behind into two well-developed 

 grooved processes. In one specimen the anterior corners amount to 

 rudimentary tentacles. The orifice of the penis is situated under the 

 right anterior corner. No irhinophorial lamellae were visible under 

 the sides of the head-shield, though considering the state of pre- 

 servation their absence is not certain. There are no parapodia or 

 lateral wings, though it seems probable that the animal cannot 

 withdraw entirely into its shell. The foot is large, 15 mm. long and 

 13 mm. broad. The free portion behind measures 6 mm. and the 

 anterior margin is not grooved. In the sole is a large subraedian 

 slit-like opening, leading into a gland 6 mm. long and 3.5 mm. broad. 

 This gland appears to have no connection with the body cavity ; it is 

 solid, without a lumen, and of cheese-like consistency. On the left 

 of the visceral mass and behind it is a fold of skin which forms a 

 cup-shaped rim, within which the viscera lie, but there is no such fold 

 on the right hand side. 



The mantle cavity is open on the right but not in front. It is rather 

 large, the roof measuring 1 2 mm. by 9 mm. From the anterior portion 



