224 NILS HJ. ODHNER 



Scalaria (Clathrus) juanina n. sp. PI. 8, fig. lo. — Shell turrite, rimate 

 umbilicate, rather fragile, milky-white, with very convex whorls sculptured with 

 thin erect transversal laminae (i6 in the last whorl, indistinctly aculeate above, 

 convex on their anterior side, channel-shaped posteriorly, and with traces of 

 transverse striae), as well as fine spiral cords; aperture circular, about one fourth 

 of the shell in length; lip continuous. Whorls 5 + (apex and last whorl broken 

 off). Dimensions: h. 5,4; br. 2,5; h. of aperture 1,7 mm. 



Though only one fragmentary shell (containing a Pagurid) of this species 

 was found — at Masatierra, 30—40 m, sand and Corallina, ^U 1917 — this is, 

 however, so characteristic in its sculpture, and differing from all species of the 

 genus hitherto known from the Peruvian Province (cf. Dall 1909), that it must 

 be referred to a new species. In its sculpture it recalls 5. deijica of Melville & 

 Standen, 1903 (from the Persian Gulf), but seems to be more slender. 



Columbella (Mitrella) lignaria n. sp. PI. 8, fig. 9. — Shell elongate- 

 turrite with shallow suture, and but little convex whorls, the penultimate and 

 the last one with spiral striae at the suture and at the canal, otherwise smooth; 

 aperture narrowly elongate, somewhat shorter than half the shell; outer lip 

 plicated within; columella with reflected margin, smooth; canal short. Colour 

 pale yellowish-brown with chestnut triangular maculations a little below and 

 immediately above the suture (on the last whorl at the suture, on the middle, 

 and on the canal) combined with narrow and close fulgurating lines of the same 

 colour. Whorls 7. Dimensions: h. 6, h. of aperture 2,6, br. of shell 2, a mm. 

 Masatierra, 30 — 40 m, sand and Corallina, V4 1917. i shell. 



There exists in the Peruvian region no species resembling this one, the 

 characteristic painting of which vividly recalls the veining in a board of wood. 



*Aplysiopsis juanina Bergh. — Masatierra, 30 — 45 m, Corallinae, ^^/a 

 19 1 7, I sp., 1. 20,5 (shell 9,s) mm. The depth of Bergh's specimens was 15 

 fms (Bergh 1898). 



*Pleurobranchaea maciilata Quoy & Gaimard. — Masatierra, 10—35 m, 

 sand and Corallinae, ^V* 1917, 4 sps., max. 1. 11 mm; 30 — 40 m, same bottom, 

 */? 191 7, I sp. with remaining colour of brown spots. — The species was 

 found by Plate, and is mentioned by Bergh 1898'; he gives 7 mm as the 

 maximum length. 



Aeolidia collaris n. sp. Figs, i, 2, — Body lengthened, rather slender, 

 head relatively small with minute smooth (as a consequence of the contraction 

 posteriorly rugose) rhinophores close to each other; oral tentacles of about the 

 same size as the rhinophores, with broad bases; foot with small angular cor- 

 ners. Papillae flattened, of varying form (ovate or of nearly uniform breadth) 

 dark blood-red in colour with minute white rings at their tips, set in about 13 

 rows, containing, at the most, 9 papillae (the 4th row); the first 3—4 rows 

 more closely gathered, meeting in the middle line behind the rhinophores. 



' Die Opisthobranchier der Sammlung Plate. »Fauna Chilensis» I. (Zoo!. Jahrb., Suppl. 

 Bd. IV.) 



