428 ME. H. M. BEKKABD OX THE CHERNETIDiE. 



described. He seems to have included the chitinous folds of the 

 genital operculum, which greatly confused the sections, as parts 

 of the sexual apparatus. This accounts for his considering the 

 ram's-horn organs and the abdominal " spinning " glands as being 

 directly connected with the sexual organs, whereas, if the above 

 account is correct, all these are distinct— the ram's-horn organs 

 are tracheae without a specialized stigmatic opening, and pro- 

 tected by opening under the genital operculum, and the 

 so-called spinning-glands open on median papillae at the anterior 

 edges of the 2nd and 3rd segments. 



In fig. 11, sections of four out of six (eight ?) glands appear, 

 which open into, and overlie dorsally, a chitin-lined pocket, 

 which, if the specimen be really a male, maybe a seminal vesicle. 



The morphological problems involved in the observations here 

 described will be discussed still more fully in a general work on 

 the morphology of the Arachnida, to be based on an account of 

 the anatomy of Galeodes, which is already near completion. 



JBihliograpTiy. 



1. Bareois. — " Le de'veloppement de Glieliferr Comp. Rend. 



xcix. (1884) p. 1082. 



2. CuoiirEBE£i&. — "Beitrage zur Kenntniss des Baues der Pseu- 



doscorpione." Bull, Soc. Imp. Nat, de Moseou, t. ii., 1888, 

 p. 416. 



3. Ceowebeeg. — " Mundtheile der Arachniden." Arch, fiir 



Naturg. 1880, p. 285. 



4. Daday. — " TJeber den Circulations Apparat der Pseudo- 



seorpione." Term, fiizetek. iv. p. 331 (1881). 



5. MacLeod, — " La structure de I'intestin anterieur des Arach- 



nides." Bull. Acad. Belg. viii. p. 377 (1884). 



6. Menge. — " Ueber die Scheerenspinnen." Neueste Schrift, 



d. Naturf. Gresellschaft. Danzig, Bd. v., parfc 2, 1855. 



7. Metschnikofe. — " Eutwickelungsgeschichte des Chelifers." 



Zeitschr. f. wiss. Zool. Bd. xxi., 1871, p. 513. 



8. Steceee. — •" Anatomisches und histologisches iiber Gihbo- 



cellumr Arch. f. Naturg. 1876, p. 293. 



9. SiECKEE. — " The Development of the Ova of Chtlionius in the 



body of the mother and the formation of the blastoderm." 

 Ann. Mag. Nat. Hist. 4th ser. vol. xviii., 1876, p. 197. 

 10. Trevieantis. — " Clielifer, der Bastard Scorpion." Yer- 

 mischte Schriften, Bd. i. p. 15, 1816. 



