1^26 MR. w. E. HOYLE ON THE [Mar. 5, 



Enoploteuthis. The medio-lateral teeth are shorter and less acute 

 than in either of these forms. 



The Anterior Salivary Glands are present and lie in the form of 

 two ramified glands packed away in the floor of the mouth. Their 

 openings are situated one on either side of the median elevation 

 which forms the floor of the mouth anterior to the radula. 



The Posterior Salivary Glands are in contact with the inferior 

 surface of the oesophagus, and sHjihtly overlap the cephalic cartilage ; 

 they form a pyriform mass, the pointed extremity being directed 

 backwards. The entrance of the duct into the oesophagus was not 

 made out. 



The (Esophagus (Plate XIII. fig. 4, oe) is very slightly fusiform just 

 behind the central nervous system ; but it cannot be said that a 

 crop is formed unless the expansion were very much greater than in 

 the examples examined. Another fusiform portion is seen just before 

 it opens into the stomach. 



The Sto?nach (s) is simple and saccular, more elongated in the larger 

 specimen than in the smaller. In one of the examples from the 

 Narwhal's stomach there was a chitinous lining, which had become 

 completely detached. It appeared to have formed a coating over 

 the whole inner surface of the organ, and is much thinner at the 

 posterior extremity than it is a little way behind the oesophageal 

 opening. There were, however, no dentiform prominences such as 

 I hope to describe elsewhere in an account of the genus Taonius. 

 In the same instance it contained a quantity of fragments of Crus- 

 taceans, but not one of them was large enough to give any chance of 

 specific determination. 



The Rectum (r) as usual leaves the stomach close to where the 

 oesophagus enters it, and about the same point is the opening of tlie 

 caecum. It presents no noteworthy features. 



The Ctecum (c) lies upon the anterior part of the ventral aspect 

 of the stomach, somewhat towards the right. It is coiled into a 

 complete spiral and presents a striated appearance which seems to 

 be due to a series of folds in its lining mucous membrane. 



The Digestive Gland (d.y., " liver" of various authors) is large 

 and ovoid and has the usual relations. The structure usually known 

 as "pancreas" {pan.) is situated in the angle between it and the 

 caecum and oesophagus. 



VIII. Circulatory Organs. 



The /^ear^ (Plate XIII. fig. ^,v) is broadly pyriform in shape, the 

 anterior end being somewhat narrower than the posterior ; it is directed 

 as usual almost antero-posteriorly, the anterior end being turned a 

 little towards the right. At two opposite points in its largest dia- 

 meter the heart receives the branchial veins {br.v), which as usual pass 

 along the anterior or free side of those organs. There are only two 

 aortic apertures to the heart, wliich are situated at its anterior and 

 posterior extremities {a.ao, p.ao) ; the former gives off the cephalic 

 aorta, quite in the ordinary manner. As regards the vessel from 



