Amphioctopus aegina (Gray 1849)

Octopus hardwickei Gray, 1849

DIAGNOSIS.—Animal small to medium-sized (22–29 mm ML). Mantle elongate (MWI 50.0–59.1); neck slightly constricted; head narrow (HWI 40.9–41.4); eyes moderate in size. Funnel damaged in syntype. Arms artifactually elongated in syntype. Suckers moderate in size (SIn 8.3); especially enlarged suckers absent in males and females. Right arm III of males hectocotylized; ligula length moderate (LLI 8.8), relatively narrow; calamus long (CLI 36.5), narrow, acutely pointed. Web shallow (WDI ∼15), web formula B = C = D > E > A, sector A noticeably reduced. Gill lamellae 6–8. Penis long (PLI 27.6). Spermatophores armed with teeth-like projections (with crochets) arranged in circlets. Radula with A3 seriation of rachidian. General color in preservation (alcohol) dark brown with narrow, dark bands beginning on mantle and extending down head adjacent to distal edge of eyes and down dorsal surface of arms I. Web with reticulated pattern extending down arms II and III (and IV?).

ORIGINAL DESCRIPTION.—Gray, 1849:8.

TYPE LOCALITY.—Singapore? [sic].

TYPES.—Syntypes: BMNH 1947.3.11.2–3, 1 male, 29 mm ML, 1 female, 22 mm ML. Specimens in alcohol, in moderate condition, arms disfigured (buccal mass of male syntype not extant). (Robson (1929:115) incorrectly gave the museum registration number as BMNH 1927.12.10.1–2 for the syntypic lot. Pickford (MS) determined there was no such number. The registration number given above is correct.)

DISTRIBUTION.—Eastern Indian Ocean; southwest Pacific Ocean?

Octopus smedleyi Robson, 1932

DIAGNOSIS.—Animal small (30 mm ML). Mantle ovoid (MWI 73.3); neck constricted; head relatively narrow (HWI 40.0). Arm length moderate (ALI 74), arm order IV > III > I > II. Web depth shallow (WDI ∼20), web formula D = E > C > B > A. Funnel long, slender; funnel organ W- shaped, inner and outer limbs compressed and broadly fused. Dorsal surfaces of mantle, head, and web densely covered with small, simple papillae.

ORIGINAL DESCRIPTION.—Robson, 1932a:24.

TYPE LOCALITY.—Unknown; presumably the Malayan region based on the one-time presence of the type in the Raffles Museum, Singapore (not traced, presumed no longer extant, see “Discussion”).

TYPE.—Holotype: Female, 30 mm ML, not extant (see “Discussion”).

DISTRIBUTION.—Unknown.

Octopus dollfusi Robson, 1928

DIAGNOSIS.—See “Discussion.”

ORIGINAL DESCRIPTION.—Robson, 1928a:43, figs. 22–27.

TYPE LOCALITY.—Western Pacific Ocean, Indochina (precise locality unknown).

TYPE.—Holotype: MNHN 4-5-899 (fide Lu et al., 1995), male, 34 mm ML, ∼119 mm TL, A. Krempf no. 2.129, specimen dried, shrunken.

Octopus aegina Gray, 1849

DIAGNOSIS.—Mantle elongate. Arm formula IV > III > II > I. Suckers large, distantly spaced, first 5 to 6 suckers uniserial, suckers biserial distally.

ORIGINAL DESCRIPTION.—Gray, 1849:7.

TYPE LOCALITY.—Unknown.

TYPE.—Holotype: BMNH 1928.2.14.1 (old collection), female (fide Robson, 1929).