OF CONCHOLOGY. 17 



under sides of the mantle lineated same as above, and dotted with 

 violet, the former shaded with violet beneath and along the upper 

 margin, and the latter margined with dingy red. 



Length, one and a half inch. 



Habitat, Tahiti. 



Station, (under stones at low water. A. G.) 



Chromodoris rufomaculata, Pease. Plate 8, fig. 1. 



Animal oblong, flaccid, smooth, pellucid, rounded above, 

 slightly dilated anteriorly, obtusely rounded in front, slightly 

 undulated along the margin, and rounded behind. Cervical ten- 

 tacles well developed, erect, oblong ovate, mucronate, finely 

 lamellate, peduncles stout and retractile in tubular cavities. 

 Labial tentacles small, finger-shaped. Branchial star small, 

 rather remote from the hinder end of the body, composed of 

 nine lanceolate, pinnate plumules, which are incurved and retrac- 

 tile into a common cavity. Vent prominent. 



Foot elongate, fissured and truncately rounded in front, taper- 

 ing behind to an acutely rounded point, which projects conside- 

 rably posterior to the body. 



Color cream white, passing into cream yellow toward the 

 margins, which are ornamented with a series of oblong violet 

 spots. The central portion of the mantle is studded with nu- 

 merous slightly elevated orange dots. Branchiae colorless. 

 Tentacles chocolate brown, laminae white. 



Under surface colorless, with the exception of a slight tinge 

 of the dorsal colors, which are transmitted through the pellucid 

 mantle. 



Length, one inch. 



Habitat, Island of Huaheine. 



Station, (under stones at low water mark. A. G.) 



Chromodoris simplex, Pease. Plate 8, fig. 2. 



Animal smooth, oblong, convexly rounded above, sides nearly 

 parallel and rounded at either end. Cervical tentacles well 

 developed, subclavate, slightly compressed laterally, peduncles 

 stout, laminae deeply cut, very oblique, and retractile into tubu- 

 lar cavities. Branchial star small, half the width of the body; 

 plumules eight, sub-erect, lanceolate, pinnate, retractile into a 

 simple cavity. Labial tentacles reduced to small lobes. 



Foot elongate, narrow, slightly dilated and rounded in front, 

 tapering behind to an acute point, projecting beyond the mantle 

 some distance. 



2 



