186 New Species of Mollusc of the Genus Helicina. 



Head above and hind neck brown, back brownish-rufous, rump and 

 upper tail -coverts rather brighter; tail rufous with a bhickisli wash on 

 the inner webs of the two central featliers at their ends ; superciliary 

 streak white ; throat, breast, sides of the head and of the neck grayish- 

 white, the throat is immaculate but the feathers of the other parts have 

 blackish- brown centres, giviug them a very distinct spotted appearance: 

 abdomen and under tail coverts light rufous; quills blackish-brown, wing 

 coverts and edges of inner quills bright rufous ; false wing black ; bend of 

 wing, while; under wing coverts grayish-white tinged with rufous, inner 

 webs of quills for their basal half of a very light salmon color, their ter- 

 minal half edged with light rufous ; upper mandible dark brown, the under 

 yellowish-white, dusky at the end; tarsi aud toes dark brown. 



Length (skin) 5^ in. ; wing 2; tail 2|; bill y'j ; tarsi \^. 



Habitat. Province ot" Tunibes, Peru. 

 Type ill Museum of V;issar College, Poughkeepsie. 

 It was in a small collection received by Prof. Ortoii and 

 placed in my hands for examination. 



Remarhs. In colors and general appearance this species 

 resembles S. guianensis, but the wings are shorter ; iS. gui- 

 anensis is darker below and has the tail of a deeper rufous, 

 without the dusky markings on the ends of the central 

 feathers ; the new species can easily be distinguished by the 

 decided suj)erciliary stripe, and the sni;dl spots on the sides 

 of the head and of the neck, and on the breast. 



XII. Description of a New Species of Mollusc of the 

 Genus Helicina. 



BY THOMAS BLAND. 



Read April 22nfl, 1872. 



Helicina. g'lo^'nei, nov. sp. 



T. subglobosa, tenuis, pellucida, pallide cornea, epidermide lineis spirali- 

 bus, confertis, pilosulis induta, sub epidermidem nitida, striatula, lineis 

 microscopicis concentricis decussatula; spiraparum elevata, apice acuti- 

 cuscula, rufescente; anfr. 4i, convexiusculi, ultimus rotundatus, seri- 



