Boone, Molliisca, Cruises of "Ara" and "Alva" 357 



fig. 6) ; the rachidian teeth have been described by Robson ( 1929, p. 

 104) and the pallial stylets figured by Jatta (1896, pi. 24, fig. 13b) . 



The reproductive organs have been figured by Naef (I.e., fig. 

 405; Marchard 1907, p. 363, and Robson I.e., figs. 28, 29, 30). 



The living octopus is brown splashed with red markings (d'Or- 

 bigny and other authors) . The texture of the skin is naturally a 

 fine shagreen, consisting of pointed granules which may be aug- 

 mented by low, rough verrucae. Though difficult to translate in 

 words, one familiar with Octopits macropus readily appreciates the 

 nuances of delicate sculpturing that distinguish this octopus from 

 0. vulgaris Linne, which has a similar distribution, in part. 



The largest representative of Octopus macropus recorded is 

 a Mediterranean specimen which weighed 1.6 kilograms and had 

 a total measure of 1.5 meters. 



References: Octopus macropus, Risso, A., Hist. Nat. Europe 

 Meridionale .... Paris, 1826, t. IV, p. 3. — Jatta, G., Fauna 

 u. Flora d. Golfes von Neapel Monogr. XXIII, 1896, p. 217, 

 pis. 6, 23 and 24. — Marchand, W., Studien uber Cephalopo- 

 den I. C. Wiss. Zool., Leipzig, 1907, p. 362. — Naef, A., Fauna 

 e Flora del Golfo di Napoli Monogr. XXXV, Die Cephalo- 

 poden, 1923, 1 Th. Bd. I, lief 2, p. 702.— Robson, G. C., Monogr. 

 Recent Cephalop. of Brit. Mus. N. H., pt. I, 1929, p. 101, figs. 

 27-30 (with extensive synonymy) . 



Octopus (Octopus) ornatus Gould 

 ■f 



Plate 151 



Type: The type of this species was collected by the United 

 States Exploring Expedition at Oahu and Maui, in the Sandwich 

 Islands (Gould). It is deposited in the United States National 

 Museum and, when examined by the writer in 1921, had deterior- 

 ated through neglect to such extent as to be scarcely recognizable. 

 The "Albatross" material of this species, also deposited there, had 

 fared no better. 



Distribution : This species is restricted to the littoral waters 

 of the Hawaiian Islands, there being but three published records 



