AGLAJA. 55 



The form is practically the same as in the other species. Head- 

 shield somewhat emarginate in front, sides and posterior edge 

 strongly projecting. The lateral margins of posterior shield also 

 project strongly, especially behind. Surface of the shields quite 

 even. The posterior mantle-wings are strongly developed, bound 

 together above by a strongly produced middle piece, stronger than 

 in A. depicta. The wings are similar to that species, but more pro- 

 duced, without flagellum. 



Shell (pi. 14, fig. 85) 3 mill, in diam., width of the calcified part 

 of the large whorl 0'8 mill. It has only a quite small and not pro- 

 jecting spire, which is prolonged in a pretty long continuation be- 

 low, this being excavated on the anterior side. Spire and the wide 

 simple whorl chalk-white and hard, the latter with thickened hind 

 margin. This hard part of the shell is surrounded by a yellow 

 cuticle, and this again by a quite thin colorless cuticle. 



St. Thomas and Guadeloupe (Riise). 



Doridium punctilucens BERGH, Mittheil. Zool. Stat. Neap., xi, p. 

 131, pi. 8, f. 16. 



This species is quite distinct from those of the Mediterranean, 

 and will be easy to recognize by its color (emerald-green spots of 

 the back, the linear striation, especially beneath), and the form of 

 the shell also differs. 



A. GEMMATA Morch. Unfigured. 



Subcylindrical, narrower in front, yellow or dull fleshy with close 

 longitudinal black lines. Shield dilated in front, with obscure, 

 small close longitudinal lines, often bifid or forked, diverging, and 

 beautiful green, shining, convex spots, of which there are four ar- 

 ranged bead-like on the neck, especially conspicuous. Mantle con- 

 vex, with large obscure clouds and very close black lines. Anal 

 and respiratory tubes entire and strong; below bilobed, left lobe 

 falciform, right lobe tongue-shaped, subtruncate. Gill-plume acute 

 and arcuate; foot lobed on each side, ornamented with black longi- 

 tudinal lines often confluent ; thence it is spotted, and reticulated 

 in front ; foot lobes narrow, margin arcuate, reflexed, blackish 

 above with spots and dots of yellowish here and there confluent. 

 Length 18, diam. 7, alt. 8 mill. Shell not seen, but by the feel it 

 seems to be narrow falciform. 



St. Thomas (Riise). 



