36 ZOOLOGICAL COLLECTIONS MADE DURING [Jan. 4, 



Couthouy appears to be another closely allied species ; but in each 

 instance there are differences in detail of sculpture which may separate 

 the three forms. 



Doris, sp. 



Hub. Port Bermejo, at the southern end of Madre Island, W. 

 coast of Patagonia. 



A single specimen was obtained by Dr. Coppinger. It closely 

 resembles the British D. tuberculata, a species already recorded 

 from Kerguelen's Land. 



b. Terrestrial. 

 Helix (Patula) coppingeri, sp. n. (Plate IV. figs. 14, 14 a.) 



Shell minute, discoid, umbihcated, pale luteous. Spire scarcely 

 raised above the last whorl. Suture deep. Whorls 3|, slowly 

 enlarging, ornamented with most delicate slender and close-set cos- 

 tellse or raised lines of growth, and with very numerous fine spiral 

 elevated lines between the costellse, visible only under the micro- 

 scope. Umbilicus moderately small, equaUing about ^ of the basal 

 diameter. Aperture lunate ; lip simple. Greatest diam. Ifmillim., 

 height 1. 



Hab. Tom Bay, found on a rotten tree. 



This minute species is remarkable for the fine riblets and the 

 beautiful spiral sculpture, the latter being vastly finer than the 

 former. 



Helix (Patula) magellanica, sp. n. (Plate IV. figs. 15-156.) 



This species resembles the preceding in general aspect. The colour 

 is the same ; but the whorls increase more rapidly, and are only 2g 

 in number. The longitudinal riblets are excessively slender, and 

 both finer and more numerous than in //. coppingeri. This species 

 also is without spiral sculpture. Umbilicus rather more open, and 

 the body-whorl beneath narrower than in that species ; but above it 

 is broader. Suture the same. Aperture a trifle larger. Diam. If 

 millim., height 1. 



Hab. With the preceding. 



H. lyrata, Couthouy, from Tierra del Fuego, apparently belongs 

 to the same group, and is closely related. 



Helix (Zonites ?) ordinaria, sp. n. (Plate IV. figs. 16, 16rt.) 



Shell smallj umbilicated, thin, glossy, discoid, transparent. Whorls 

 3|, convex, margined at the suture, rather slowly enlarging, faintly 

 striated by the lines of growth. The margination of the whorls 

 forms a distinct channel at the suture. Spire depressed, scarcely 

 raised above the last whorl, which is rounded at the periphery. Um- 

 bilicus rather open, exhibiting two of the upper volutions. Aperture 

 large, lunate. Peristome thin, simple, a little reflexed at the 

 umbilicus. Greatest diam. 3 millims., height 1|. 



Hab. Tom Bay, attached to the frond of a fern. 



