154 Mr Mac Bride, Mesenchyme cells in Echinid larvae. [May 11, 



Whilst not wishing to go so far as Mr Sedgwick in denying 

 reality to the conception of the cell, I am inclined to hold that 

 the cell structure of the Metazoa is largely due to secondary 

 differentiation, and that a multinucleate Protozoon like Actino- 

 sphserium is to be compared to the Metazoon body, and not to a 

 single unit of the same. 



(3) Crania from Teneriffe. By F. C. Shrubsall, B.A., 

 Clare College. 



When engaged in a course of study at the Vesalianum at 

 Basel, Professor Kollmann pointed out the importance of the 

 Guanches and advised a detailed examination of that race if ever 

 an occasion should offer. This spring, having to spend a short 

 time in Teneriffe, I gladly availed myself of the opportunity to 

 measure and describe all the Guanche skulls of whose existence 

 I could learn in the island. I first examined those in the pos- 

 session of the British Vice-consul, and afterwards worked at 

 various private collections, both in Santa Cruz and Orotava, 

 besides which I have measured the crania in the Vesalianum at 

 Basel, those in the Anatomical museum at Cambridge, and those 

 in the museum of the Royal College of Surgeons, London. To the 

 owners and curators of these collections I must return my sincere 

 thanks for the great kindness and courtesy with which they gave 

 me every facility in their power for my study. 



Altogether I have examined 54 male and 39 female skulls, and 

 some 200 long bones, while in the seriations at the end of the 

 paper I have included the various indices of the skulls in the 

 collection from the Canary archipelago at Las Palmas, a printed 

 copy of the measurements of which was lent me by Don Ramon 

 Gomez of Puerto-Orotava. 



The following are the details of the examination : 



Cranium. 



On taking the cranial capacity of skulls from Teneriffe it is at 

 once apparent that while they can roughly be divided into two 

 series, the large and the small, the classification thus established 

 does not extend to other features, all the variations of face and 

 cranium hereinafter to be described being found in either series. 

 The average capacity of the large male skulls is 1550 cc. (maximum 

 1600 cc, minimum 1425 cc), while that of the series of small male 

 skulls is 1180 cc. (maximum 1250 cc, minimum 1155 cc). The 

 total mean of the male skulls is 1451 cc, and the average capacity 

 of the females is 1375 cc, a mean sexual difference of 75 cc. or Jg 

 of capacity. This at first sight anomalous result being doubtless 



