140 ARGONAUTA. 



:>. Fornt. of A. nodosa. 

 y A. NODOSA. Sohnidcr. PI. f)*). tio-. Vl\. 



Aiiiinal. body acumiiialiMl l)i>liiiul ; arms more wolibed bc4ow 

 tlian above. muMiual ; in the roUowiiig- order 1. 2, 4, 8; the sec- 

 ond and third pairs kech'tl on tlie outer siih' ; the seeond pair 

 dei)ressed. 



Shell compressed, thin; sides with transverse nn>a'. l)roken 

 uj) into tul)ercles ; tubercles of tlie keels rathei- shai'}). elevated, 

 and sometimes laterally compressed; margin with a si)ine or 

 " ear " on either side. 



A specimen in Coll. A. X. S. is of the form <)bti(mn(nda^ l)ut 

 the ear is usually well developed. The sides of this species art' 

 nior»' convex and the 1)ack broader than in A. Argo. 



Brazil, New Zealand, Indian Ocean, Cape of Oood Hope* 



A. (iENJCLiLA. Gould. 1*1. .")(). tig-. 12;"). 



Described from a single specimen obtained with a seine at 

 Kio Janeiro, it was a female of rather large size, being six 

 inches long, but without a shell. It ditiers from A. Argo in the 

 web between the ujjper and lower pairs of arms being more 

 distinct, the dotting <jf the surface Hni'r. tlu' vela more elongated 

 with the surrounding cui)ules much less definite and extensive. 

 Fioni A. tuherculata {nodosa), it differs in having a much longer 

 siphon, a greater number of cupules and different formed vela. 

 The first paii' of arms are descri])ed as having a joint-like 

 lli'xure (probably accidental), and the general color is greenish, 

 wilh chocolate spots surrounded with golden green annuli. 



Bvazil. 



A. RiJFA, Owen, has not been characterized sutliciently to assign 



it a i)lace among admitted species. 



<S. Pacific Ocean. 



OcvTiioK PUNCTATA. Say, is described fioni a single si)ecimen 

 with its shell found in the stomach of a dolphin, and said to be 

 preserved in the collection of the Academy at Philadelphia. 

 The specimen is no longer extant, and Mr. Say believing the 



* A specimen witli iuiiinal, alive, aiul another specimen of the shell, 

 in perfect condition, came ashore on the New Jersey Coast in 1876 and 

 1877. — LocKwooD, in American Naturalist. 



