1889.] ON THE ANATOMY OF GONATUS FABRICII. 11/ 



EXPLANATION OF THE PLATES. 

 Plate XL 



Fig. 1, 1 a. Biplommatina lutea, p. 112. 



2, 2 rt. 'platyclicilus,-^.\V2i. 



3, 3 a. rubella, p. 113. 



4, 4«. aurea, p. 113. 



5, ba. crasdlubris, p. 113. 



6, alhata, p. 113. 



10. 10 a, 10 i, 10 c. Hungerfordia pelewensis, p. 115. 



Plate XII. 



Fig. 1,7 a, 7 b. Biplommatina gibboni, p. 114. 



8, 8 a. jKttula, p. 1 14. 



9, 9 a. sfrigafa, var. kororensin, p. 115. 



11. 11 a, 11 b, 11 c. Helix {Endodnnta) /cororends, p. 110. 



12. 12 ft, 126, 12<?. ( ) fusco-zonata, p. 116. 



4. Observations on tlie Anatomy of a rare Cephalopod 

 {Gonatus fabricii). By William E. Hoyle, M.A. 

 (Oxon.)j F.R.S.E. (Commuuicated by Professor G. 

 B. Howes, F.L.S., E.Z.S.) 



[Eeceived Februaiy 27, 1889.] 

 (Plates XIII. & XIV.) 



Contents. 



I. Introduction, p. 117. 

 II. General Disposition of the Organs, p. 119. 



III. Tlie Cartilages, p. 119. 



IV. Tlie Pen, p. 121. 



V. The Muscles, p. 124. 

 VI. The Nervous System and Sense-Organs, p. 124. 

 VII. Digestive Organs, p. 125. 

 VIII. Circulatory Organs, p. 12(5. 

 IX. Eespiratory Organs, p. 127. 

 X. Excretorv and Generative Organs, p. 127. 

 XI. The Funnel-Organ, p. 128. 

 XII. General Conclusions, p. 131. 

 XIII. Explanation of the Plates, p. 134. 



I. Introduction. 



The specimens upon which the following investigation is based 

 were as follows : — 



1. Three immature examples obtained during the 'Valorous' Expe- 

 dition, varying in length from 30 to 50 millim. 



2. A number of fragments, representing about a dozen individuals, 

 taken by my friend Mr. Robert Gray, of Peterhead, from the stomachs 

 of a Bottle-nosed Whale (Hyperoodon rostra(us) and a Narwhal. 

 These were for the most part only arms, from which all the hooks 

 and suckers had been removed, with the buccal mass included 



Proc. Zool. Soc— 1889, No. IX. 9 



