224 NILS HJ. ODHNER 
Scalaria (Clatirus) juanina n. sp. Pl. 8, fig. 10. — Shell turrite, rimate 
umbilicate, rather fragile, milky-white, with very convex whorls sculptured with 
thin erect transversal laminae (16 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. 5,43. bt..2,5;h., Of aperture 1,7 mn: 
Though only one fragmentary shell (containing a Pagurid) of this species 
was found — at Masatierra, 30—40 m, sand and Corallina, 1/4 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 S. dezfica of Melville & 
Standen, 1903 (from the Persian Gulf), but seems to be more slender. 
Columbella (Wella) lignaria n. sp. Pl. 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 2,2 mm. 
Masatierra, 30—40 m, sand and Corallina, 4/4 1917, 1 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, °°/3 
I917, I sp., |. 20,5 (shell 9,5) mm. The depth of BERGH’s specimens was I5 
fms (BERGH 1898). 
*Pleurobranchaea maculata Quoy & Gaimard. — Masatierra, 1o—35 m, 
sand and Corallinae, *'/4 1917, 4 sps., max. l. 11 mm; 30—40 m, same bottom, 
'/7 1917, I sp. with remaining colour of brown spots. — The species was 
found by PLATE, and is mentioned by BERGH 18987; he gives 7 mm as the 
maximum length. 
Aeolidia collaris n. sp. Figs. 1, 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, 9g papillae (the 4th row); the first 3—4 rows 
more closely gathered, meeting in the middle line behind the rhinophores. 
1 Die Opisthobranchier der Sammlung Plate. »Fauna Chilensis» I. (Zool, Jahrb., Suppl. 
Bd. IV.) 
