2sj"o. 16. — On the Javj and Lingual Dentition of certain Terrestrial 

 Mollusks. By W. G. Binney. 



("With two Plates.) 



CHLAMYDEPHORUS.* 



Animal (PL II. Fig. A) liraaciform ; mantle covering the whole hody, with 

 an orifice on the centre of the back near the tail, enclosing at the same part a 

 subhexagonal, solid, internal .shelly plate : no caudal mucus pore ; distinct lo- 

 comotive disk to foot ? external excretory, respiratory, and generative orifices ? 

 tentacles and eye -peduncles two each: no jaw; teeth of lingual membrane 

 (PI. II. Fig. B) as in Glandina, arranged in chevron, aculeate. 



This generic name is suggested for a peculiar slug collected by Mr. J. S. 

 Gibbons in Natal Colony, Africa, and submitted by him to me. Its mantle 

 covering the whole body can be compared only to tha;t of Tebennophorus {Me- 

 gimathium, Incilaria, Philomrjciis), Pallifera, Athoracophorus (Janella, Aneitea, 

 Triboniophorus, Aneihim), Veronicella, and Vaginulus as restricted by Stoliczka 

 (Journ. Asiatic Soc. Bengal, N. S. xlii. pt. 2, pp. .33-37) to the agnathous spe- 

 cies resembling Veronicella. This last genus, Vaginulus, can alone be com- 

 pared with the slug before me in wanting a jaw and having Glandina-like teeth 

 on its lingual membrane, and at the same time not having any external shell. 

 It differs, however, from the Natal .slug in wanting the peculiar dorsal orifice, 

 and the internal shelly plate. I am forced, therefore, to suggest a new name 

 for this slug. The dried condition of the animal jirevents me learning the po- 

 sition of the external orifice of generation ; I suspect that of respiratory and 

 excretory organs to be through the hole on the centre of the animal's back. 



The single specimen received is deposited in the collection of the Phila- 

 delphia Academy of Natural Sciences, together with the internal shelly plate 

 and the mounted lingual membrane. 



Chlamydephorus Gibbonsi. 



Animal (PI. II. Fig. A) elongate, rather slender, cylindrical, rather more 

 than 3 inches long when fully extended, tapering towards head, broadest about | 

 inch from tail, towards which it slopes ; tail rather blunt ; dorsum rounded, head 

 small ; color a dark, dull orange, thickly mottled, and marbled with dark olive 

 brown, the margin of the foot and mesial line of dorsum being the only parts 

 where tlie ground color is well seen. A slight eminence on the broadest part 

 of the body (near posterior end) is perforated l)y a round orifice, a line or 

 rather more in diameter ; from this small orifice furrows radiate, passing to tail, 

 to the margin of foot and forwards ; dorsum finely sulcato-striate from head to 

 orifice, the striae being granulosa. A row of small regular tubercles runs along 



* X^CL/Ji^s, tpipti). 



