78 SCIENCE PROGRESS. 



that they go hand in hand with a corresponding phalan- 

 geal formula and minor resemblances of a more detailed kind. 



II. In Review. 



The first of the two monographs which have called forth 

 this article deals with the Cetacea, a group of animals of 

 notoriously aberrant organisation, peculiarly associated with 

 the past history of the science of gross anatomy in our 

 own land ; and not a few of the more striking discoveries 

 which it announces have been made during the author's 

 study of material preserved in our National Museum. The 

 interest which of old centred in these colossal denizens 

 of the deep — the largest of all known animals living or 

 extinct — has of late been materially increased (i.) by the 

 discovery of an apparently herbivorous Dolphin in the 

 Cameroons 38 with its anterior nares prolonged up into a 

 couple of tubes, for which a parallel exists only among 

 the Osteichthyes and certain frugivorous bats, 39 (ii.) by the 

 surmise that, by analogy to certain Mammals and Reptiles 

 of the past, their colossal stature may be indicative of their 

 approaching near extinction, 40 (iii.) by the probable extermi- 

 nation of one species within recent years, 41 (iv.) by the bold 

 generalisation of Albrecht 42 that the living mammalia should 

 be divided into Cetoid and Non-cetoid sub-classes, of which 

 the latter are the more primitive (which, although more 

 sensational than sound, has served the good purpose of 

 stimulating research) ; and last, but not least, (v.) by the 

 series of brilliant preliminary communications, from time 

 to time issued by the author of the work now under review. 



The Kiikenthal monograph embodies the results of 

 seven years' close and laborious investigation, and for 

 the first time puts the study of Delphinology upon a 

 secure embryological basis. It was commenced upon 

 material given its author by Professor Haeckel, and largely 

 continued upon that collected by himself during a couple 

 of expeditions to East Spitzbergen, under the auspices of 

 the Bremen Geographical Society, further famous for the 

 capture of a new variety of Lepidnrus^ and material for 

 the fuller elucidation of the extremely rare Proneomenia 

 Sluirteri. u The work was published in two parts, the first 



