INTRODUCTION. Vll 



11 Spindlar fr&n Nikobarerna," etc.* Instead of using the terms 

 Tetrapneumones and Dipneumones for the two suborders of the 

 Order Aranece (or Aranece theraphosce and Aranece verce, as they 

 are now called by M. Simon) f, I call them Parallelodontes and 

 Antiodontes, the backwardly directed parallel fangs of the mandibles 

 being the surest character by which to distinguish the so-called 

 Tetrapneumones from other Spiders £. I have retained the old 

 Latreillean groups or tribus Territelarice, Tubitelarice, etc., with 

 the addition of those lately proposed by Dr. Marx and by myself, 

 and of which only the Cavitelarice (fam. Filistatoidce) and Pseudo- 

 territelarice (Dysderoidce, etc.) are represented in Mr. Oates's 

 collection. Of the Tribus Verticulatce, Thor. (fam. Liphistioidce), 

 and Umbellitelarice, Marx (fam. Hypochiloidce), no representatives 

 have as yet been found in Burma. The reasons why I cannot 

 adopt the division of the Antiodontes into Cribellatce and Ecribellatce 

 are stated in my paper on Dr. Bertkau's classification ; nor am 

 I prepared to adopt the two groups, Haplogynce and Entelogynce, 

 into which M. Simon divides his Aranece verce ecribellatce: these 

 groups are, I think, not very natural, and several Spiders, f. inst. 

 the family Tetragnathoidce, which M. Simon refers to the Entelo- 

 gynse, would seem to belong to the Haplogynae, according to the 

 principal characters of these groups. (Conf. Sim. H. N. d. Araignees, 

 2 e ed. i. no. 1-3 §.) 



As my opinions regarding the rules for zoological nomenclature 

 differ, in some particulars, from those entertained by several modern 

 zoologists, I take this opportunity of making a few remarks on this 

 subject. The rules for nomenclature which I, in this as in my 



* K. Svenska Vet.-Akad. Handl. xxiv. no. 2 (1891). 



t Ann. Soc. Entom. France, 6 e ser. x. (1890) ; Hist. Nat. d. Araignees, 

 2 e ed. i. no. 1 (1892). 



{ Four so-called " lung-sacs " are, as is known, found also in the Spiders 

 belonging to the Tribus Umbellitelarm, Marx ; whereas the claws of the man- 

 dibles are parallel and directed backwards, as in the Parallelodontes, only in 

 some males of other Spiders having, as a secondary sexual character, the 

 mandibles abnormally directed forwards, as is the case in most Salticirus (and 

 in Delozeugma, Cambr. ?). See, moreover, Thor., ' Spindlar fran Java och 

 nargransande oar,' etc., in Bihang till K. Svenska Vet.-Akad. Handl. xx. Afd. iv. 

 no. 4, p. 4, where I have given my reasons for not accepting the names pro- 

 posed by M. Simon for the two suborders. 



§ I have, unfortunately, not had the opportunity of studying more than 

 the first number of this most important work ; I did not receive the third 

 number till the manuscript of the present Catalogue had left my hands. 



