354 Records nv the S.A. MrsErM 



SEPIADARIUM AURITUM Robson, 1914. 



1014. St'/^iiidariiiiii iiiirifiiiii R(i1k(hi. Proc. Zool. Soc. 1914, p. 677. text fig'. .\-E. 



Chart Xo. 10. 



Type LocnHfy. Off Hermite Island. Monte Bcllo Group. Western Australia 

 (Rnbson). 



Recorded Distribution. Known only from the type locality. 



Remarks. This species lias been but briefly characterized, but the figures 

 lead one to belie^•e that it will |)rnve to be distinct from either of the other forms 

 here recognized. The long, narrow fins are especially characteristic. Robson 

 ( i<;i4, p. 677) ap|)ears to consider his species after a manner an intermediate 

 form between Scpiadariitin and .Scpioloidea. but the fin characters mentioned are 

 hardly sufficient for one to recognize it as other than a thorough-going Sepia- 

 dariiim. 



SEPIADARIUM AUSTRINUM sp. nov. 



Chart Xo. 10. 



Diagnosis. Bod\ small, sepioliform. Fins semicircular or semicordate, 

 less ihan half the length of the body, attached well behind the middle. Head 

 large, about as wide as the body. .-Inns nearly as long as body, the two dorsal 

 pairs a little longer than the \entral two. Suckers small, biserial. but sometimes 

 crowded into 4 rows near middle of arm. and almost always in 4 rows at tips 

 where they become much reduced in size. Hectocotylised arm of male with 

 9I-10 pairs of normal suckers on basal portion, these replaced distally by a single 

 series of stiff, somewhat pointed, tongue-shaped lamellae, more or less grooved 

 at the apex in such a way as finally, at the very tip of the arm. to result in the 

 lamellae being split into alternating rows of small papillae ; true marginal webs 

 absent : entire arm strongly recurved dorsally and the resulting concavity exca- 

 vated. Tentacle clubs stronglv keeled and with about 6 rows of small suckers on 

 the widest part, largest ventrally. Total length of type specimen. 3J -o mm. 

 Dorsal length of mantle. 12 3 mm. \\'idth of body, 12-5 mm. 



Type Locality. '>t. \'incent Cnlf. South Australia (A. Zietz. September. 

 18S5). 



Recorded Pistribution. Known only from the type locality. 



Remarks. The most distincti\-e feature of this little squid, as compared with 

 its two congeners, lies in the structure of the hectocotylized arm. Tn general 

 plan the hectocotylus is similar in all three species of Sepiadariuni, but in 



