Boone, Mollusca, Cruises of ' ' Eagle ' ' a nd ' ' Ara, ' ' 1921-28 197 



Technical description: The ''Ara" specimen measures 32 mm. 

 body length and is rather widely elongate oval, being about three-fifths 

 as wide as long, convex posteriorly. There is a distinct low peripheral 

 keel on the mantle. The head is a little narrower than the body, the 

 eye rather small, with a single prominent cirrhus above the eye ; out- 

 side and below the eye there is a linear rugosity of skin. The mantle 

 aperture is narrow. The surface of the body is regularly covered with 

 five roundish warts, some of which are individually multifid. These 

 warts are somewhat less abundant on the ventral side of the body and 

 web. The arms are about 75 per cent, of the total length and are 

 nearly subequal. The suckers are very small, arranged in double rows, 

 with 5 or 6 pairs of larger ones proximally, graduating to very minute 

 ones distally. The web between is nearly 25 per cent, of the depth of 

 the arms and is approximately of subequal depth. The web along the 

 outer keel of each arm is very well developed on the proximal portion 

 and extends in a narrowed form to within a short distance of the tip 

 of the arm. The funnel organ is W-shaped. 



References: Octopus unicirrhus Delle Chiaje, Mss., 1838. — D'Or- 

 bigny, and Ferussac, Cephal. Acetab., p. 70, pi. 1, 1835-38. 



Scaeurgus unicirrhus Tiberi, Boll. Soc. Mai. Ital., vol. 6, p. 12, 1880. 

 — Jatta, Fauna und Flora Neapel, Mon. 23, p. 234, tav. 3, fig. 2, 

 color plate, tav. 25, figs. 14-22, tav. 26, figs. 1-3, 1895 (with full 

 synonymy and description). — Robson, Mon. Recent Cephalopoda, 

 Brit. Mus., p. 192, 1929 (with synonymy and description). 



Genus: ELEDONE Leach. 

 Eledone moschatus (Lamarck). 



Plate 124. 



Type: Collected in the Mediterranean; deposited in the Paris Mu- 

 seum. 



Distribution : Mediterranean Sea, littoral to 50 fms., on both rocky 

 and sandy bottoms. 



Material examined: One specimen, collected at Monaco, Mediter- 

 ranean Sea, 1927, by the "Ara." 



Color : There is a very fine color plate of this species in the ' ' Flora 

 and Fauna of the Gulf of Naples," table 3, figure 4, showing the 

 octopus to be a light brownish mud color on the dorsal surface, with 



