140 



Kosenstadt, B., Beiträge zur Kenntnis der Organisation von Aselhts aquaticus 



und verwandter Isopoden. in; Biolog. Centralbl. 8. Bd. No. 15. p. 452 



— 462. — Abstr. in: Journ. R. Microsc. Soc. London, 1888. P. 6. 



p. 948 — 949. 

 Osborn, Henry L., Elementary histological studies of the Cray-fish. X. With 



1 pi. in: Amer. Monthly Microsc. Journ. Vol. 9. Aug. p. 139 — 143. — 



XL ibid, Oct. p. 179—183. 

 (V. Z. A. No. 287. p. 462.) 

 Mackay, W. J,, The intercoxal lobe of certain Crayfishes, in : Proc. Linn. 



Soc. N. S. Wales, (2.) Vol. 2. P. 4. p. 967 — 969. — Abstr. in: Journ. 



R. Microsc. Soc. London, 1888. P. 4. p. 577. 

 Bergendal, D., Male Appendages on Females. (Crustacea.) Abstr. in: Journ. R. 



Microsc. Soc. London, 1888. P. 5. p. 730. 



(Öfvers. K. Svensk. Ak.) - v. Z. A. No. 287. p. 463. 

 Über abnorme Formen der ersten abdominalen Anhänge bei einigen 



Krebsweibchen. Mit l Taf. (Bihang tili K. Svensk. Vet.-Ak. Handl. 



14. Bd. IV. Afd. No. 3.) Stockholm, 1888. 8«. (35 p.) 

 Starnati, G, Digestion in Cray-fishes. Abstr. in: Journ. R. Microsc. Soc. London, 



1888. P. H. p. 947. 



(Bull. Soc. Zool. France.) — v. Z. A. No. 287. p. 402. 



II. Wissenschaftliche Mittheilimgeii. 



1. Reproductive Organ of Phascolosoma Gouldii. 



By E. A. Andrews, Johns Hopkins University. 



eingeg. 15. Januar 1889. 



Since the publication in 1874 by Ludwig of Semper's view that 

 the organs found by him at the base of the ventral retractors in certain 

 Sipunciilidae were the true reproductive organs the same explanation 

 of the origin of the sexual cells found floating in the coelom has been 

 given by The el in 1S75 for PhascoUon and Phascolosoma and by Cos- 

 movici in 1879 for Phascolosoma, while Koren and Uanielssen 

 in 187 7 observed and figured such organs in six species oi Phascolo- 

 soma, but did not regard them as reproductive organs and Selenka in 

 1883 includes the possession of such organs among the characters of 

 .the group Sipunculidae. 



W^hcther this position of the reproductive organs is common to all 

 the .Sipunculidae is, perliaps, still an open question, though the masses 

 described by Koren and Danielssen as reproductive organs are, 

 I judge, to bo regarded merely as clots of the coelomic fluid and the 

 facts observed by ('lapa rede in 1S51 and by SI u iter in ISSI seem 

 to require more detailed investigation. 



As regards the exact nature of the reproductive organs Avhen 

 found on the retractors much remains to be determined ; an exami- 

 nation of one species Phascolosoma Uouldii Keferstein [Sipunculus 



