170 RUNCINIDE. 
Conch., iv, p. 75, pl. 8, f. 3; pl. 12, f. 26.—L. pictus Martens & 
LANGKAVEL, Donum Bism., p. 54, pl. 3, f.5. 
When disturbed they cast off all their lobes, which retain their 
vitality for several hours. (Pse.). 
Pease’s dealings with this species have been far from straightfor- 
ward. He first described it in 1861 without a specific name; then 
in 1863 he bestowed the name ZL. viridis; and finally, in 1868,.he 
repeated the substance of his first description and renamed the 
animal L, picta. 
III. TecriBRaANcHIATA NOTASPIDEA. 
Tectibranchs in which the dorsal surface is protected by a large 
shield (“ noteum”’) or mantle, with or without an external or buried 
shell; no head-shield nor pleuropodial lobes. 
Synopsis of Families. 
I. Radula with the formula 1.1.1 ; rhinophores wanting ; stomach 
armed with four large, denticulate plates; shell very small or 
wanting ; small animals, Runcinide. 
II. Radula with very many longitudinal and transverse rows of 
teeth ; rhinophores developed, of the usual slit form. 
a. Shell either wanting or thin, auricular or haliotiform, 
with terminal spiral nucleus, and in part or wholly 
concealed, Pleurobranchide. 
aa. Shell well-developed, external, patella-like, with the apex 
near the middle, Umbraculide. 

Family RUNCINID& Gray. 
Runcinade Gray, Guide to Syst. Dist. Moll. B. M., p. 204.—Pel- 
tidae VAysstERE, Recherches Zool. et Anat. Moll. Opistobr., p. 104. 
Shell small and posterior, or obsolete. 
Body limaciform, convex above, the mantle or dorsal shield cov- 
ering the upper surface except the end of foot; separated from foot 
by a deep groove. Eyes sessile, anterior; tentacles or rhinophores 
wanting or subobsolete. Foot about as wide as body. Gills pos- 
terior on the right side, pinnate with few lamine. Anus behind the 
gill. Orifice of female reproductive organs in front of gill; penis 
